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Control panel GEA Omni™ Operating manual E_801550_1

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Control panelGEA Omni™

Operating manualE_801550_1

COPYRIGHTAll Rights reserved.No part of this documentation may be copied orpublished by means of printing, photocopying,microfilm or otherwise without prior written consentof

• GEA Refrigeration Germany GmbHherein after referred to as the manufacturer. Thisrestriction also applies to the drawings and diagramscontained in the documentation.

LEGAL NOTICEThis documentation has been written in allconscience. However, the manufacturer cannot beheld responsible, neither for any errors occurring inthis documentation nor for their consequences.

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SYMBOLS USED IN THIS MANUALDanger!

Stands for an immediate danger whichleads to heavy physical injuries or tothe death.

Warning!

Stands for a possibly dangeroussituation which leads to heavyphysical injuries or to the death.

Caution!

Stands for a possibly dangeroussituation which could lead to lightphysical injuries or to damages toproperty.

Hint!

Stands for an important tip whoseattention is important for thedesignated use and function of thedevice.

Operating manual | GEA Omni™Control panel

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TABLE OF CONTENTS1 SAFETY AND CONFORMITY 7

1.1 Safety Instructions 71.2 Safety note concerning the connection of the GEA Omni™ with the starter panel 81.3 Conformity - CE marking (Europe) 91.4 Conformity - UL marking (USA, Canada) 9

2 USER INTERFACE 102.1 Menu Navigation 112.2 Status Bar 13

2.2.1 Logging In 132.2.2 Current State 152.2.3 Notifications, Warnings and Shutdowns 16

2.3 General Navigation 172.3.1 Tile Navigation 172.3.2 Grid and Chart Navigation 172.3.3 User Adjustable Fields 172.3.4 Keyboard 182.3.5 Keypad 192.3.6 User Non-Adjustable Fields 192.3.7 Drop Down Boxes and Text Edit 19

2.4 OmniView 202.4.1 Main Viewing Application 21

2.5 Compressor 232.5.1 Main Tab 25

2.6 Condenser 262.6.1 Overview tab 272.6.2 Main tab 282.6.3 Schedule tab 30

2.7 Sequencer 342.7.1 Overview tab 352.7.2 Main tab 372.7.3 Schedule Tab 39

2.8 Service 432.8.1 I/O Status Tab 442.8.2 Touch Panel Tab 47

2.9 Panel Settings 482.9.1 Localization Tab 482.9.2 Network Tab 50

3 CONTROL 523.1 Compressor Control Parameters 52

3.1.1 Capacity Control 523.1.2 Control 57

3.2 Compressor Operating Data 593.2.1 Analog Inputs/ Outputs 593.2.2 Standard Calculated Values 613.2.3 Digital Inputs/ Outputs 62

3.3 Normal Operating States 663.3.1 Stopped Description 663.3.2 Starting Description 663.3.3 Running Description 673.3.4 Stopping Description 67

4 ANNUNCIATIONS 684.1 Shutdowns 684.2 Warnings 734.3 Notifications 76

5 LIST OF ABBREVIATIONS 77

Operating manual | GEA Omni™Control panel

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1 SAFETY AND CONFORMITY

1.1 Safety Instructions

The GEA Omni™ is reliable in operation if used as specified.

Hint!

Read the safety instructions in the GEA Omni™ operating manual before startup.

The intended use includes the observance and compliance of the following:

• all notices regarding hazard to persons and damage to property in the operating instructions,

• the country-specific standards and safety regulations,

• the instruction for installation, operation and maintenance,

• the details of certificates,

• the requirements for personnel,

• the obligation to exercise due care.Only compliance with all provisions and guidelines will enable optimum protection of the personnel as well asdangers to the environment and the safe and smooth operation of the GEA Omni™.

Warning!

GEA Omni™ can cause hazard in case of improper or unintended use. A malfunctionindication on the touch screen cannot be ignored.A personal injury or damage to the machine or plant can be the result.For precautions to prevent danger see safety instructions in the operating manual.

Warning of electric shock!Danger of electric shock exists.More than one switch-disconnect may be necessary to isolate all electrical components.Before maintenance work on the control panel, make sure that all electrical components areswitched off.

Danger!

It should be ensured at any time that all are necessary processes for compressor cooling andlubrication in operation as long as the compressor is in operation.This applies esprecially for the case where the compressor is unintentionally in operation. Theunintentionally compressor operation can be determined by observation of the compressormotor feedback, the motor current or the motor speed.

Operating manual | GEA Omni™Control panel

Safety and ConformitySafety Instructions

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1.2 Safety note concerning the connection of the GEA Omni™ with the starter panel

Hint!

It is not permitted to add an external controller between the GEA Omni™ and the power panel;this would compromise the safety interlocks designed for protecting personnel andequipment. All control signals between the GEA Omni™ and the starter panel must beprocessed directly and must not flow indirectly via an external controller. GEA RefrigerationNorth America, Inc. cannot otherwise guarantee the safe operation of the system.

Safety and ConformitySafety note concerning the connection of the GEA Omni™ with the starter panel

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1.3 Conformity - CE marking (Europe)

The CE marking of the GEA Omni™ takes place according to the Low Voltage Directive 73/23/EEC and theEMC Directive 89/336/EEC.By affixing the CE mark, the manufacturer confirms the conformity of the product with the applicable ECDirectives and compliance with the principle requirements stipulated within them.The CE mark is affixed in the cabinet.

fig.1: CE mark

1.4 Conformity - UL marking (USA, Canada)

The UL marking of the GEA Omni™ takes place according to the UL certification process and confirms thecompliance with national standards in the United States and Canada.With affixing the UL marking, the manufacturer confirms the GEA Omni™ is built to the guidelines of UL.The UL mark is affixed in the cabinet.

fig.2: UL mark

Operating manual | GEA Omni™Control panel

Safety and ConformityConformity - CE marking (Europe)

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2 USER INTERFACE

The screen shown below will appear when the GEA Omni™ panel is powered on.The central portion of the screen will change depending on the current display of the panel.The sections along the bottom and left edge contain important information regarding the status of the panel andits devices, as well as options used for navigation between displays. These sections will remain visible at alltimes.

fig.3: Initial Screen

User interface

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2.1 Menu Navigation

fig.4: Main menu bar

The menu bar is used to navigate through the various user interfaces available on the GEA Omni™ panel. Eachoption will display a new screen on the panel. For full information on a given option, see the associated sectionof the document.The options and their corresponding sections are shown in the list below.

OmniView Section 2.4, page 20

Compressor Section 2.5, page 23

Condenser Section 2.6, page 26

Sequencer Section 2.7, page 34

OmniNet

History

Documentation

Service Section 2.8, page 43

File Manager

Configuration

Operating manual | GEA Omni™Control panel

User interfaceMenu Navigation

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Panel Settings Section 2.9, page 48

Panel Info

User interfaceMenu Navigation

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2.2 Status Bar

fig.5: Default status bar

The status bar is displayed regardless of which screen is currently open on the panel. It displays the currentuser, the status of the compressor and any notifications, warnings or shutdowns that have been annunciated.The current date and time is also displayed in the bottom right corner of the bar.

fig.6: Expanded status bar

Touching anywhere on the status bar will bring up the sub-screen displayed above, which allows the user levelto be changed, detailed status information to be viewed, and annunciations to be acknowledged or cleared.

2.2.1 Logging In

fig.7: Default users

The bottom left corner of the panel displays the user who is currently logged in. The icon is also color coded toindicate the permissions each user has access to. When no user is logged in, this section will display LoggedOut and the user icon will be red. Once a user has logged in, the name of the user will be displayed and the iconwill change to green if the user’s access level is Operator or Service, or yellow if the user’s access level isAdmin.

Hint!

Admin level is only for use by GEA certified technicians.

Operating manual | GEA Omni™Control panel

User interfaceStatus Bar

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fig.8: Remote Icon

Additionally, if the panel is currently being viewed remotely through OmniLink, the bottom left hand corner of thedisplay will blink back and forth between the icon for the current user and the remote icon shown above. Theremote icon is always colored blue and displays how many remote devices are currently viewing the paneldisplay.

fig.9: User panel

The section shown to the far left of the sub-screen when the status bar is clicked displays a list of all userscurrently associated with the panel. For more information on adding or deleting users, refer to InstructionManual .If the user selected in the list is the one that is currently logged in, the Logout button will be enabled, which willcause the panel to display the Logged Out message until another user is logged in. The Login button will beenabled whenever a user account other than the one that is currently logged in is selected.When a user not currently signed in is selected, the Login button will be enabled. Touching it will bring up anumeric keypad which will allow the user to enter their password. If the correct password is entered, the selecteduser will be signed in on the panel. If another user is already logged in, logging in as a different user will result inthem being signed out.

The default passwords for the Operator, Service and Admin access levels are displayed in the table shown tothe below. It is advisable to change these passwords once startup is completed.

Access level Default password

Operator 1

Service 123654

Admin 1236547890

User interfaceStatus Bar

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Hint!

The Admin account will only be accessible on new panels if a USB containing the AdminAccess Key file is plugged into the panel. In this case, the Admin password does not need tobe entered.The Admin account will also be accessible for Retrofit panels and panels sold without apackage or skid. In this case, the user will need to enter the Admin password displayed above.The account will remain enabled until the panel is commissioned.

2.2.2 Current State

fig.10: Status panel

The bottom center portion of the panel display shows the status of the compressor controlled by the panel. Ifmultiple devices are controlled from a single panel, the display will cycle between them periodically.The section shown in the middle of the sub-screen when the status bar is clicked displays a list of all devicescontrolled by the panel, such as compressors and evaporators and their current status.

Operating manual | GEA Omni™Control panel

User interfaceStatus Bar

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2.2.3 Notifications, Warnings and Shutdowns

fig.11: Annunciation icons

The bottom right portion of the status bar directly to the left of the date and time block will be clear during normaloperation of the panel. If the panel ever annunciates a notification, warning or shutdown, the correspondingportion of the bar will flash with the number and type of the annunciation.

fig.12: Annunciations panel

The section shown to the far right of the sub-screen when the status bar is clicked displays detailed informationabout each annunciation. Along with an icon detailing the type of the annunciation, the display includes the nameof the annunciation, along with the date and time that it was triggered.The buttons on the right of the display are used to acknowledge and clear annunciations. An annunciation withthe acknowledge button, abbreviated ACK on the display, will not be removed from the list, even if the issue thatcaused the annunciation in the first place is resolved, until the button has been pressed. Other annunciationsmay be cleared using the Clear button, which will immediately remove the annunciation.However, if the condition that caused the annunciation in the first place has not been resolved, the annunciationwill reappear in the list. Any annunciation that is tracked by the Omni Historian will also appear with a Historybutton, which may be pressed to automatically open the historical table.

User interfaceStatus Bar

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2.3 General Navigation

The user interface (UI) for the GEA Omni™ makes use of a number of different navigation methods. Thefollowing is a brief description of each of these methods.

2.3.1 Tile Navigation

fig.13: Sample Tile display(Documentation Screen)

Certain screens, such as the Documentation and Configuration screens, display information divided acrossmultiple tiles. Each tile corresponds to a specific element, such as a compressor or other device in theconfiguration screen or a specific document in the documentation screen. Touching a tile will display theinformation connected to the tile.For specific information regarding specific tiles see the appropriate section below. To return to the tile display,the Close button in the bottom right corner of the display must be clicked.

2.3.2 Grid and Chart Navigation

Grid and chart displays, such as those displayed in the Main compressor screen and the History screen, containdetailed information divided into columns. For detailed information on specific tables, please see the appropriatesection below.A table or grid may be navigated by using touch functionality to scroll through the data, or by touching a row andusing the arrow buttons.

2.3.3 User Adjustable Fields

Fields that may be modified by the user are indicated by a white background. These fields are used for data thatmay need to be modified while the panel is in operation.Exception: List of Control Parameters. Fields that may be modified by the user are indicated by a white or lightblue background.

Operating manual | GEA Omni™Control panel

User interfaceGeneral Navigation

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2.3.4 Keyboard

When a field is selected that allows a text string to be entered by the user, the keyboard shown below will appearin the lower half of the screen.

fig.14: Keyboard display (Letters)

The letter keys may be used in the same manner as a normal keyboard. The &123 button changes the display ofthe keyboard to the one shown below, which is used to add numbers or frequently used symbols to the string.

fig.15: Keyboard Display (Numbers and symbols)

User interfaceGeneral Navigation

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2.3.5 Keypad

When a field is selected that allows only numeric value to be entered by the user, the keypad shown below willappear in the lower half of the screen. The number keys may be used to enter a new value for the field, and the+/- key is used to change the sign of the value.

fig.16: Keypad display

2.3.6 User Non-Adjustable Fields

Fields that may not be modified by the user are indicated by a dark gray background. These fields are used forinformation that is intended to be displayed only.

2.3.7 Drop Down Boxes and Text Edit

Various fields that allow user input are in the form of text boxes and drop down lists.A text box appears as a blank white box and may be used to enter any text string the user desires.Drop down lists are differentiated from text boxes by a downward pointing arrow on the far right. These fieldshave a predetermined list of possible values which appear in a vertical list when the arrow is clicked, from whichthe user may select the desired value.

Operating manual | GEA Omni™Control panel

User interfaceGeneral Navigation

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2.4 OmniView

fig.17: Main OmniView screen

User interfaceOmniView

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2.4.1 Main Viewing Application

The main OmniView screen will display tiles corresponding to each device controlled by the panel. Each tiledisplays the name and pertinent information for the associated device.

Standard Devices

1. Compressor

fig.18: Compressor tile

Tiles corresponding to compressors display the name, set point, status and current values associatedwith the compressor. While the capacity of the compressor is being increased, an upward facing arrowwill be displayed in the lower right hand corner of the tile. Similarly, a downward facing arrow will bedisplayed in the bottom left hand corner of the tile if the compressor capacity is being decreased. Thecolor of the tile is determined by the current status of the compressor. If the compressor is notconnected, the tile will be colored gray. The other colors, in order of precedence, are:

• Red/ light green flash: Illegally Started

• Red: Shutdown

• Light green: Running

• Yellow: Warning

• Dark green: StoppedTouching any tile will open the compressor screen for the selected compressor.Refer to Section 2.5, page 23 for full details on compressor operation.

2. Evaporator

Operating manual | GEA Omni™Control panel

User interfaceOmniView

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3. Condenser Sequencer

fig.19: Condenser sequencer tile

The tile corresponding to the condenser sequencer displays important information relating to the controlof condenser devices. The information displayed, from top to bottom, includes:

– Control value

– Set point

– Status

– Current step

– Fans running

– Pumps runningTouching the condenser sequencing tile will open the overview screen for the condenser. Refer toInstruction Manual for full details on condenser control.

User interfaceOmniView

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4. Control Level (for compressor sequencing)

fig.20: Control level tile

These tiles each correspond to a control level for use in compressor sequencing. The informationdisplayed on each tile, from top to bottom, includes:

– Control value

– Set point

– Status

– Current step

– Compressors running

– Compressors availableTouching any control level tile will open the overview screen for the sequencer. Refer to InstructionManual for full details on compressor sequencing.

5. Pump Package

2.5 Compressor

The Compressor menu is used to control each compressor from the panel. There are multiple tabs which aredetailed below. The bottom of the screen contains the eight standard buttons used to control the compressor.Active buttons are illuminated with black text and a white outline while inactive buttons are darkened with whitetext.

fig.21: Standard compressor buttons

The buttons are:

Operating manual | GEA Omni™Control panel

User interfaceCompressor

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1. STOPThis button is illuminated whenever the compressor is in the stopped state, whether through a normalstoppage or through a shutdown condition. Touching this button will initiate the stopping procedure. Formore information, refer to Section 3.3.4, page 67. Touching the button a second time will cause thecompressor to stop without unloading.

2. STARTThis button is illuminated whenever the compressor is running in local mode. Touching this button willattempt to start the compressor. If the compressor is in the process of starting, this button will flash.Once the compressor has started, the button will be illuminated continuously. If the compressor is inAutomatic Start/Stop mode, this button will display an A in its upper left hand corner and will resumeflashing if it has been automatically stopped to allow pressure to build.

3. REMOTEThis button is illuminated whenever the compressor is set to receive instructions from an externalsource, such as a sequencer. Touching this button will switch the compressor from local to remotecontrol.

4. AUTOThis button is illuminated whenever the compressor is set to control its capacity automatically based onthe control signal. Touching the button will switch the compressor to Automatic mode.

5. HOLDThis button is illuminated when the compressor is set to maintain its current capacity and will not load orunload for any other reason. Touching and holding the button will display a block of additional buttonsbased on the type of the compressor.Alternatively, simply touching the button will cause the compressor to hold at its current capacity slideposition.The example shown below displays the options for a screw compressor, and may be used to select thecapacity slide position at which the compressor should hold.

fig.22: Hold position options

6. LOADThe gray bar on the right of this button represents an LED. Whenever the Load Solenoid of thecompressor is energized, the LED will be illuminated green. Touching and holding the button while thecompressor is running in Local mode will force the compressor to increase capacity unless a limitationfor capacity increase is active. This will also force the compressor into Hold mode.

User interfaceCompressor

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7. UNLOADThe gray bar on the right of this button represents an LED. Whenever the Unload Solenoid of thecompressor is energized, the LED will be illuminated green. Touching and holding the button while thecompressor is running in Local mode will force the compressor to decrease capacity unless a limitationfor capacity decrease is active. This will also force the compressor into Hold mode.

8. EXTERNALTouching the button will force the compressor’s capacity mode into External mode. This button will beilluminated when the capacity of the compressor is being controlled remotely from an external device.

2.5.1 Main Tab

fig.23: Main tab display

This screen contains all of the operational data for the compressor. For panels configured to control a singlecompressor, this screen will be the default display. If multiple compressors are controlled from the panel, this tabwill display information pertaining to the compressor most recently selected in the tile display of the OverviewTab detailed in section "Overview Tab" (not yet available at the moment). If no tile has been selected in theoverview screen, this screen will display the first compressor. The display is divided into three parts:

Operating manual | GEA Omni™Control panel

User interfaceCompressor

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1. Main Compressor DisplayThis portion of the screen displays the current status of the compressor. The color of the display isdependent on the status of the compressor. The colors, in order of precedance, are:Red/ light green flash: Illegally StartedRed: ShutdownLight green: RunningYellow: WarningDark green: Stopped

2. Operating DataThis table contains the current values associated with the compressor.The information in the table is divided into three columns. The left column contains the slice location ofthe value, if applicable. If the row in question does not correspond to a slice location, this column will beblank. The middle column contains the name of the variable. The right column contains the current valueand units of the variable, if applicable.The Edit Grid button in the upper right corner of the table will display a fourth column containing checkboxes which allows the user to toggle which rows are displayed. A checked row is displayed, while anunchecked row is hidden. While the check boxes are displayed, the text of the Edit Grid button willchange to Save Grid. Touching the button a second time will hide the fourth column and display onlyselected rows.Each user may customize the values displayed in this table separately.For details on individual elements of the Operating Data display, refer to Section 3.2, page 59.

3. Control ParametersThis table contains the name and current values of the parameters used to control the compressor.Each parameter may be edited by touching the row and either selecting an option from a list ofpossibilities,or entering a new value using the keypad or keyboard. The color of the text indicateswhether the value may be edited; blue values may be modified, gray values may not. For normaloperation, only the parameters that may be edited by the user are displayed.Touching the Advanced View button will instead display all parameter data. This will also change the textof the button to Basic View, which may be clicked a second time to only display the editable parameterdata. For details on individual control parameters, refer to Section 3.1, page 52.

2.6 Condenser

User interfaceCondenser

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2.6.1 Overview tab

fig.24: Condenser overview tab

This screen contains a tile display which represents the condenser system and devices. The tile in the upper leftcorner represents the condenser sequencer. The sequencer tile, as shown below, displays important informationrelating to the condenser control, including, status, set point, control value, the number of fans running and thenumber pumps running.

fig.25: Condenser sequencer tile

All other tiles shown on the overview display represent different condenser devices. Each tile displays thecurrent status of the device and whether control is currently enabled. For variable speed devices, the currentspeed will also be displayed. The type of device is indicated by the symbol. The different types of devices are:

Fans

Operating manual | GEA Omni™Control panel

User interfaceCondenser

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fig.26: Condenser fan tile

Pumps

fig.27: Condenser water pump tile

Touching any tile will open the Main Tab of the Condenser Screen, detailed in Section 2.6.2, page 28 below.

2.6.2 Main tab

This screen is used to display the current status and control parameters of the compressor sequencer andindividual devices. The display will change depending on whether it is currently showing the status of thesequencer or an individual device.When the sequencer tile is touched, the main tab will display the screen shown below:

User interfaceCondenser

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fig.28: Main condenser tab (Condenser sequencer)

1. Sequencer informationThis tile displays the current status, set point and control value of the sequencer.

2. Device enabledThis switch is used to toggle whether or not the condenser squencing is currently permitted to run.

3. Control parametersThis table contains the parameters used during condenser sequencing. The values may be manuallychanged by touching a row.

When a device tile is touched, the main tab display will instead appear as shown below.

fig.29: Main condenser tab (Condenser device)

Operating manual | GEA Omni™Control panel

User interfaceCondenser

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1. Device informationThis tile displays the name, current status, set point and control value of the selected device. The currentspeed will also be displayed here for variable speed devices.

2. Device enabledThis switch is used to toggle whether or not the device is currently permitted to run.

3. Control parametersThis table contains parameters containing basic information regarding the selected condenser. The valuesmay be manually changed by touching a row.

Touching the Main tab displayed at the top of the screen will bring up the display corresponding to the mostrecently selected tile. If no tile has been previously selected in the Overview tab, the panel will bring up theinformation of the condenser sequencer by default.

2.6.3 Schedule tab

fig.30: Condenser schedule tab

This screen is used to display and modify the condenser sequencer schedule. The main portion of the displaycontains the currently selected control schedule, which is displayed in table format with each condenser deviceassigned to a column and each row corresponding to a different step. The sequencer supports four independentschedules, each containing up to fifty steps. The components of the display are:

1. Schedule informationThis section contains the user defined name for the currently selected schedule, the target set pointand the current condenser status.

2. Control valueThis section displays the current value of the condenser control value.

User interfaceCondenser

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3. Hide/ show timersThis button controls whether or not the three initial columns of the schedule table, containing thetime delays used while the sequencer is running automatically, are displayed.

4. Schedule selectionThis drop down list is used to select which schedule is currently displayed.

Operating manual | GEA Omni™Control panel

User interfaceCondenser

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5. Schedule tableThis table displays all steps that will be executed by the condenser sequencer during normal paneloperation.

fig.31: Condenser schedule table

a. Current stepThis icon indicates which step is currently being executed by the sequencer.

b. Previous timerThis column contains the period of time that the sequencer will wait before changing steps onceit has been instructed to switch to the previous step. This column will not appear if the HideTimers button has been clicked.

c. Soak timerThis column contains the period of time that the sequencer must remain on the current stepbefore determining if it should step ahead to the next step, step back to the previous step, orremain on the current step. This column will not appear if the Hide Timers button has beenclicked.

d. Next timerThis column contains the period of time that the sequencer will wait before changing steps onceit has been instructed to switch to the next step. This column will not appear if the Hide Timersbutton has been clicked.

e. Condenser devicesThese columns each correspond to an individual condenser device. The contents of each celldictate what action the device will take during the associated step. The options are:

– RunThis option is available for single speed fans and pumps. It will cause the device to activateduring the associated step.

– StopThis option is available for all devices. It will cause the device to deactivate during theassociated step.

– Hold

User interfaceCondenser

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This option is only available for variable speed devices. Whenever it is selected, the devicewill continue to run at its current speed during the associated step.

– AutoThis option is only available for variable speed devices. Whenever it is selected, apercentage value may be entered, corresponding to a percent of the device’s maximumspeed. The device adjusts its speed automatically to match the chosen value and continueto make adjustments to maintain the chosen value during the associated step.

6. Control buttons

fig.32: Condenser control buttons

These buttons are used to control the sequencer. The buttons are:

a. AutoAs long as this button is illuminated, the sequencer will run automatically based on the valuesentered in the three timer columns.

b. HoldAs long as this button is illuminated, the sequencer will remain on the currently selected step.

c. NextWhen this button is touched, the sequencer will immediately switch from the current step to thenext step below it in the table. If the sequencer is already on the final step, touching this buttonwill have no effect.

d. PreviousWhen this button is touched, the sequencer will immediately switch from the current step to theprevious step above it in the table. If the sequencer is already on the first step, touching thisbutton will have no effect.

The values in the table display may be modified by touching the appropriate cell of the table.Whenever a cell containing a time is touched, the sub-window below will be displayed.

Operating manual | GEA Omni™Control panel

User interfaceCondenser

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fig.33: Condenser timer control display

The value of the timer may be changed with the number pad, and the units may be changed withthe drop down list in the middle. If the Apply to all Timers box is checked, any change made to onetimer will affect all timers in the same column. The arrow keys may be used to navigate through thetable.Whenever a cell in a condenser device column is touched, the sub window will instead appear asshown below:

fig.34: Condenser device control display

The state the condenser should enter in the given step may be selected in the central options block.For certain options which require a percentage of the maximum capacity to be specified, the secondoptions block will be enabled. A percentage between 0% and 100 %, incremented in values of 5%,may be selected from this list.

2.7 Sequencer

User interfaceSequencer

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2.7.1 Overview tab

fig.35: Sequencer overview tab

This screen contains a tile display which represents the compressor sequencing system. The blue tiles locatedon the left side of the display represent the individual control levels and display the current status, set point,control value, current step and number of compressor devices for each. A sample control level tile is shownbelow.

fig.36: Control level tile

All other tiles represent individual compressors. Each tile contains the compressor name, its current status andthe control value. The number in the upper right hand corner of the tile indicates which control level thecompressor is associated with. A sample compressor tile is shown below.

Operating manual | GEA Omni™Control panel

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fig.37: Compressor device tile

The color of the tile is dependent on the current state of the compressor. The colors are:

Gray This color indicates that the associated compressor is not currently communicatingwith the panel.

Dark green This color indicates that the associated compressor is currently stopped.

Light green This color indicates that the associated compressor is currently running.

Yellow This color indicates that the associated compressor is currently in a Warning state.

Red This color indicates that the associated compressor is currently in a Shutdown state.

Compressor tiles may be added or removed from the display using the buttons in the bottom right hand corner ofthe tile display. Clicking the Add button will bring up the sub window shown below, which may be used toconfigure a new compressor.

fig.38: Add compressor display

1. This panelThis switch is used to select whether the control for the associated compressor is local to the panel or if thesequencer can only control the compressor remotely through a network connection.

2. Brand IDThis drop down list is used to select the type of panel associated with the tile. This field will only be enabledif the This Panel switch is disabled.

User interfaceSequencer

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3. IP addressThis text box is used to enter the network location where the local panel controlling the compressor may befound. This field will only be enabled if the This Panel switch is disabled.

4. Compressor selectionThis drop down list is used to select the number of the compressor. The options are dependent on the typeof panel affiliated with the compressor.

5. LevelThis drop down list is used to select which of the available control levels the compressor will be sequencedon. Any level that is currently enabled will appear in the options.

6. Unit IDThis drop down list is used to select the Modbus ID of the panel. This option will only be used if thesequencer utilizes an Ethernet to Serial communication convertor.

7. Device tagThis drop down list is used to select the name that will be associated with the compressor.

Clicking any tile will open the main tab for the compressor sequencer as detailed in Section 2.7.2, page 37.

2.7.2 Main tab

This screen is used to display the current status and control parameters of the compressor sequencer andindividual devices. The display will change depending on whether it is currently showing the status of a controllevel or a specific compressor.When a control level tile is touched, the main tab will display the screen shown below:

fig.39: Main sequencer tab (Control level)

1. Control level informationThis tile displays the current status, set point, current step and control value of the control level.

Operating manual | GEA Omni™Control panel

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2. Level enabledThis switch is used to toggle whether or not compressors on the selected level are currently permitted to besequenced.

3. Control ParametersThis table contains the parameters used during compressor sequencing. The values may be manuallychanged by touching a row.

4. Arrow ButtonsThese buttons may be used to navigate between the displays for each control level.

When a device tile is touched, the main tab display will instead appear as shown below.

fig.40: Main sequencer tab (Compressor device)

1. Device informationThis tile displays the Name, current status, set point and control value of the selected device. The color ofthe tile is dependent on the current status of the compressor. Refer back to Section 2.7.1, page 35 for a listof the colors and their meanings.

2. Device enabledThis switch is used to toggle whether or not the Device is currently permitted to run.

User interfaceSequencer

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3. Compressor deviceThis section contains the information that was entered when the compressor in question was added to theoverview display. Refer back to Section 2.7.1, page 35 for the functions of each field. The fields are:

• This panel

• Brand ID

• IP address

• Compressor selection

• Level

• Unit ID

• Device Name

4. Arrow buttonsThese buttons may be used to navigate between all compressor devices.

Touching the Main tab displayed at the top of the screen will bring up the display corresponding to the mostrecently selected tile. If no tile has been previously selected in the Overview tab, the panel will bring up theinformation of the compressor sequencer by default.

2.7.3 Schedule Tab

fig.41: Sequencer Schedule Tab

This screen is used to display and modify the control behavior of the compressor sequencer. The main portion ofthe display contains the control schedule, which is displayed in table format with each compressor deviceassigned to a column and each row corresponding to a different step. The sequencer supports up to fifty steps.The components of the display are:

Operating manual | GEA Omni™Control panel

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1. Current LevelThis section contains the user defined name for the currently selected level, the target set point andthe current level status.

2. Control valueThis section displays the current control value of the level.

3. Hide/ show timersThis button controls whether or not the three initial columns of the schedule table, containing thetime delays used while the sequencer is running automatically, are displayed.

4. Level SelectionThis drop down list is used to select which level is currently displayed.

User interfaceSequencer

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5. Schedule tableThis table displays all steps that will be executed by the compressor sequencer on the currentlyselected level during normal panel operation.

fig.42: Sequencer Schedule Table

a. Current stepThis icon indicates which step is currently being executed by the sequencer.

b. Previous timerThis column contains the period of time that the sequencer will wait before changing steps onceit has been instructed to switch to the previous step. This column will not appear if the HideTimers button has been clicked.

c. Soak timerThis column contains the period of time that the sequencer must remain on the current stepbefore determining if it should step ahead to the next step, step back to the previous step, orremain on the current step. This column will not appear if the Hide Timers button has beenclicked.

d. Next timerThis column contains the period of time that the sequencer will wait before changing steps onceit has been instructed to switch to the next step. This column will not appear if the Hide Timersbutton has been clicked.

e. Compressor DevicesThese columns each correspond to an individual compressor on the currently selected level.The contents of each cell dictate what action the device will take during the associated step.The options are:

– StopThis option will cause the compressor to deactivate during the associated step.

– Stop With Wait on Drive TimersThis option will cause the compressor to stop if the period of time determined by the motorstart to start timer has fully elapsed. If the timer has not fully elapsed, the sequencer willwait for the timer to finish before instructing the compressor to stop.

– Load

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This option will cause the compressor to increase its capacity during the associated step.

– UnloadThis option will cause the compressor to decrease its capacity during the associated step.

– AutoThis option will cause the compressor to automatically take steps to maintain a specificpercent capacity. The compressor will automatically load or unload to maintain the chosenvalue during the associated step.

– HoldThis option will cause the compressor to remain at a selected capacity during theassociated step.

– StandbyThis option will cause the compressor to monitor all other compressors on the same level. Ifany monitored compressor enters a shutdown state or cannot be started remotely, thecompressor will start. If multiple compressors are in standby mode at the same time, thecompressor that is most similar to the failed or inaccessible compressor will start.

6. Control buttons

fig.43: Sequencer Control Buttons

These buttons are used to control the operating mode sequencer. The buttons are:

a. AutoAs long as this button is illuminated, the sequencer will run automatically based on the valuesentered in the three timer columns.

b. HoldAs long as this button is illuminated, the sequencer will remain on the currently selected step.

c. NextWhen this button is touched, the sequencer will immediately switch from the current step to thenext step below it in the table. If the sequencer is already on the final step, touching this buttonwill have no effect.

d. PreviousWhen this button is touched, the sequencer will immediately switch from the current step to theprevious step above it in the table. If the sequencer is already on the first step, touching thisbutton will have no effect.

User interfaceSequencer

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The values in the table display may be modified by touching the appropriate cell of the table.Whenever a cell containing a time is touched, the sub-window below will be displayed.

fig.44: Sequencer Timer Control Display

The value of the timer may be changed with the number pad, and the units may be changed withthe drop down list in the middle. If the Apply to all Timers box is checked, any change made to onetimer will affect all timers in the same column. The arrow keys may be used to navigate through thetable.Whenever a cell in a condenser device column is touched, the sub window will instead appear asshown below:

fig.45: Compressor Device Control Display

The state the compressor should enter in the given step may be selected in the central optionsblock. For certain options which require a percentage of the maximum capacity to be specified, thesecond options block will be enabled. A percentage between 0% and 100 %, incremented in valuesof 5%, may be selected from this list.

2.8 Service

The service screen contains five tabs that are used to monitor and maintain the panel.

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2.8.1 I/O Status Tab

fig.46: I/O Status tab display

This tab is used to display the current layout of the I/O system. Additionally, output slices may be forced tospecific values, but this functionality may only be accessed by a user with service level or higher permissions.The current status of the I/O system may be viewed through the LED indicators shown in the upper portions ofeach slice. Slices that do not transmit or receive I/O signals, such as power and end slices are grayed out in thedisplay. Any other slice may be clicked to display a detailed view like the ones shown below.The scopes shown on the outer edges of all the displays illustrate the raw signal received or transmitted by eachpoint.

Warning!

Caution should be exercised when forcing the value of outputs within the I/O status tab.Forcing a module to an improper value may cause harm to personnel or damage toequipment. If in doubt, contact trained personnel.

Hint!

If outputs are forced, the module will return to its original value after a thirty minute interval.

User interfaceService

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fig.47: Sample digital input slice display

The above image displays the detailed view of a digital input slice. Each channel that is configured to receive aninput signal will display its name to the side of the image. Unassigned channels will be blank. A channelreceiving an energized signal will be illuminated green while a de-energized signal will cause the channel toappear gray.

fig.48: Sample digital output slice display

The above image displays the detailed view of a digital output slice. Each channel that is configured to transmitan output signal will display its name to the side of the image. Unassigned channels will be blank. A channeltransmitting an energized signal will be illuminated green while a de-energized signal will cause the channel toappear gray. Output may be controlled automatically through the program or manually by a user with servicelevel or higher permissions. To enable manual control, the switch displayed next to the channel must betouched. While a channel is in manual mode, its state may be changed by touching the LED on the display.

fig.49: Compressor motor start notification

Operating manual | GEA Omni™Control panel

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Compressor Motor Start outputs may not be switched into manual mode, but they may be pulsed using thebutton next to the channel. When the button is touched, the warning shown to the right will appear in the upperright hand corner, which will warn the user to verify that the motor is uncoupled from the compressor before thestarter is pulsed. Touching the button next to the notification will then energize the motor starter for two seconds.

fig.50: Sample analog input slice display

The above image displays the detailed view of an analog input slice. Each channel that is configured to receivean input signal will display its name to the side of the image. Unassigned channels will be blank. The currentvalue read at each input will be displayed below the name of the channel.

fig.51: Sample analog output slice display

The above image displays the detailed view of an analog output slice. Each channel that is configured totransmit an output signal will display its name to the side of the image. Unassigned channels will be blank.Output may be controlled automatically through the program or manually by a user with service level or higherpermissions using the drop down list displayed below the name of the channel. The options in the drop down listinclude Auto and manual output values measured in mA. The manual values range from 0 mA to 20 mA inincrements of 4 mA.

User interfaceService

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2.8.2 Touch Panel Tab

This tab contains a number of functions used for panel maintenance.

fig.52: Touch panel tab display

fig.53: Wash down icon

1. Wash DownThis feature allows the user to clean the screen without accidentally making changes to the panel. Whenthis button is touched, the screen will become blank except for the button displayed above, which willappear in the upper left hand corner of the display. Each time the button is touched, it will move toanother location on the screen. The button will cycle through five locations on the screen. Once thebutton has moved through all of its locations, touching it again will exit the wash down screen and returnthe user to the main Touch Panel screen. Alternatively, the panel will automatically exit the wash downscreen if five minutes have elapsed since the screen was opened.

2. Calibrate Touch ScreenThis feature is used if the touch screen is not properly registering the location touched by the user. Thisfeature may only be accessed by a user with Service level or higher permissions. When this button istouched, the screen become blank and a crosshair will appear in the upper left hand corner. Tapping thecrosshair will cause it to move to a new location. This pattern will continue as the crosshair movesthrough a total of sixteen locations, ending in the bottom right hand corner of the display. A message boxwill then prompt the user to choose whether to save the new calibration data.

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3. Lamp TestHolding this button will turn on all lamps connected to the panel. This function is used to ensure that alllamps and their associated wiring are working properly.

4. Move Commissioned FilesThis button is used during startup once the panel has been installed. When this button is pressed, thepanel will clear out all erroneous data, warning and log reports generated during the installation process.This button may only be used once, and only a user with Service level or higher permissions may accessit.

Hint!

It is mandatory to press the Move Commissioned Files button once installation of thepanel has been completed.

2.9 Panel Settings

The Panel Settings screen is used to customize the appearance and display of the GEA Omni™ panel. Theoptions are divided across four tabs which are detailed below.

2.9.1 Localization Tab

fig.54: Localization tab display

This tab contains options that may be changed to make the panel more convenient to use based on panellocation. There are seven sections as detailed below.

User interfacePanel Settings

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1. LanguageThis section contains a single drop down list containing all supported languages. A change in this field willtrigger a corresponding change to all of the text within the panel.

2. UnitsThis section contains three drop down lists, one each for pressure, temperature and length. The selections inthese fields will change the units displayed after any value of the appropriate type.

3. Date and TimeThis section contains two drop down boxes which may be used to change the current date and timedisplayed in the bottom right hand corner of the panel. The drop down box on the left is used to input thecurrent date and the drop down box on the right is used to enter the current time.

4. Date and Time FormatThis section contains two drop down lists which may be used to select how the date and time is displayed onthe panel. The list on the left is used to select whether the date is displayed mm/dd/yyyy, dd/mm/yyyy oryyyy/mm/dd, and the list on the right is used to select whether the time is displayed in twelve or twenty-fourhour format.

5. ThemeThis section contains a single drop down list which is used to select the color display for the panel. Thedefault choice, Indoor/Dark displays white text on a dark gray background, while Outdoor/Light displaysblack text on a white background.

6. Screen Saver TimeoutThis section contains a single drop down list which is used to select the amount of time that the panel mayremain idle before switching to the screen saver. The options are 1, 5, 10, 15 and 20 minutes. This optionmay only be changed by a user with service level or higher permissions.

7. Historical Trend IntervalThis section contains a single drop down list which is used to select for what amount of time the panel willwait before adding a new set of data to the historical display. The options are 1, 2, 5 and 10 minutes. Thisoption may only be changed by a user with service level or higher permissions.

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2.9.2 Network Tab

fig.55: Network tab display

This tab is used to display the status of the panel’s network connections. It also allows the user to modify certainsettings. These options may only be modified by a user with service level or higher permissions.

1. Customer NetworkThis section displays the current network connection, if applicable. The switch displayed in this section isused to select whether DHCP, Dynamic Host Configuration Protocol, is enabled. If DHCP is enabled, thepanel will automatically search for a network connection and will fill in the IP Address, Subnet Mask,Gateway and DNS Server fields without user input. If DCHP is disabled, the values in these fields must beentered manually. If the panel successfully connects to the chosen network, the title of this section willdisplay Customer Network – Connected. Otherwise, it will display Customer Network – Disconnected.

Hint!

The IP Address Range 192.168.254.0 through 192.168.254.255 is reserved for the I/O Ethernetnetwork Setup. To ensure the functionality of both networks, do not use this range for thecustomer LAN Connection.

2. I/O NetworkThis section is used to display the IP Address and MAC Address of the panel’s I/O network coupler, ifapplicable. These values may not be modified and are only visible for users with access level of Service orhigher. If the panel successfully connects to an appropriate network location, the title of this section willdisplay I/O Network – Connected. Otherwise, it will display I/O Network – Disconnected.

3. VNC Server SettingsThis section is used to select whether a user may remotely log into the panel using VNC and whether apassword is required to do so. This section contains two switches. The switch on the left toggles whetherVNC client access is enabled for the panel and the switch on the right toggles whether a password isrequired. If a password is required, it may be changed by typing a new password into the Password andConfirm Password fields and touching the Change Password button below.

User interfacePanel Settings

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4. Serial Port SettingsThis section allows the user to modify the serial communication settings of the panel. The available protocolsare Motor Starter Communication, Modbus RTU and Allen Bradley DF1. Five additional drop down lists areprovided which allow the user to select the Baud Rate, Parity, Data Bit, Stop Bit and Node Number for thecommunication.

Hint!

The Motor Starter Communication protocol is only available if it has been enabled in theconfiguration.

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3 CONTROL

3.1 Compressor Control Parameters

Control parameters are displayed on the main Omni Compressor screen detailed in Section 2.5.1, page 25.Below is a list of all control parameters and a brief description of their function.

3.1.1 Capacity Control

The panel supports three sets of capacity parameters. For a user with Service level or higher permissions, allthree sets of capacity control parameters will be visible. For a user with Operator level permissions, the setdisplayed is dependent on the Control Mode parameter detailed in the Control group below, and the other twowill be hidden.

Parameter Units Minimum Maximum Default

Name Text Entry – See Description

Control Signal Selection – See Description

Set Point Dependent on Control Signal. Refer to Panel Data Report

Dead Band Dependent on Control Signal. Refer to Panel Data Report

Proportional Band Dependent on Control Signal. Refer to Panel Data Report

Automatic Start/ Stop Selection – See Description

Automatic Start Dependent on Control Signal. Refer to Panel Data Report

Automatic Start Delay Seconds 5 s 1800 s 5 s

Automatic Stop Dependent on Control Signal. Refer to Panel Data Report

Automatic Stop Delay Seconds 5 s 1800 s 5 s

Load Pulse Period Seconds 1 s 20 s 4 s

Unload Pulse Period Seconds 1 s 20 s 4 s

Minimum Capacity Slide Position Percent 0 % See Description 0 %

Maximum Capacity Slide Position Percent See Description 100 % 100 %

Ramp Rate Per Minute Dependent on Control Signal. Refer to Panel Data Report

ControlCompressor Control Parameters

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1. NameThis parameter contains the name used to identify the specific set of capacity control parameters. The usermay modify it by entering a desired text string into this parameter.

2. Control SignalThis parameter is used to set which input will be monitored to control the capacity slide valve of thecompressor. The options are:

• Suction Pressure

• Suction Pressure as Temperature

• Inlet Temperature

• Outlet Temperature

• Discharge Pressure

• Discharge Pressure as Temperature

• Remote Capacity Slide

• Remote Temperature

• Remote Pressure

Hint!

If this parameter is changed to an option with a different unit type, the Set point, Dead Bandand Proportional Band will be reset to their default values.

3. Set PointThis parameter is used to choose the desired value at which the compressor will attempt to maintain thecontrol signal. The user may change this parameter by entering a new value with the keypad. The maximumvalue, minimum value and units of the parameter are dependent on the chosen control signal:

• PressureIndicated in the panel pressure units as selected in the Panel Settings screen.

• TemperatureIndicated in the panel temperature units as selected in the Panel Settings screen.

• Remote Capacity SlideIndicated in percent.

4. Dead BandThis parameter is used to define a range above and below the set point within which no capacity controladjustments will be made. This functionality is illustrated in the Instruction Manual . The maximum value,minimum value and units of the parameter are dependent on the chosen control signal:

• PressureIndicated in the panel pressure units as selected in the Panel Settings screen.

• TemperatureIndicated in the panel temperature units as selected in the Panel Settings screen.

• Remote Capacity SlideIndicated in percent.

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5. Proportional BandThis parameter is used to define a range above and below the set point within which the width of thecapacity control pulses is reduced to avoid overshooting or undershooting the set point. This functionality isillustrated in the Instruction Manual . The maximum value, minimum value and units of the parameter aredependent on the chosen control signal:

• PressureIndicated in the panel pressure units as selected in the Panel Settings screen.

• TemperatureIndicated in the panel temperature units as selected in the Panel Settings screen.

• Remote Capacity SlideIndicated in percent.

6. Automatic Start StopThis parameter is used to select whether the panel is permitted to run and stop the compressor automaticallyto maintain the control signal. While the parameter is set to Enabled, an A will appear in the upper left handcorner of the Start button.

7. Automatic StartThis parameter is used to select the control signal value at which the compressor will attempt to start. Thisparameter is only visible if the Automatic Start Stop parameter is set to Enabled. The maximum value,minimum value and units of the parameter are dependent on the chosen Control Signal:

• PressureIndicated in the panel pressure units as selected in the Panel Settings screen.

• TemperatureIndicated in the panel temperature units as selected in the Panel Settings screen.

• Remote Capacity SlideIndicated in percent.

8. Automatic Start DelayThis parameter is used to select the period of time that must elapse after the conditions to automatically startthe compressor are met before it will be permitted to start. In most circumstances the control signal mustexceed the value of the Automatic Start parameter. The exception is when the control signal is set toDischarge Pressure, where the value must instead remain below the Automatic Start parameter. Thisparameter is only visible if the Automatic Start Stop parameter is set to Enabled. The value is measured inseconds.

ControlCompressor Control Parameters

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9. Automatic StopThis parameter is used to select the control signal value at which the compressor will stop. This parameter isonly visible if the Automatic Start Stop parameter is set to Enabled. The maximum value, minimum value andunits of the parameter are dependent on the chosen control signal:

• PressureIndicated in the panel pressure units as selected in the Panel Settings screen.

• TemperatureIndicated in the panel temperature units as selected in the Panel Settings screen.

• Remote Capacity SlideIndicated in percent.

10. Automatic Stop DelayThis parameter is used to select the period of time that must elapse after the conditions to automatically stopthe compressor are met before it will be permitted to start. In most circumstances the control signal mustremain below the value of the Automatic Start parameter. The exception is when the control signal is set toDischarge Pressure, where the value must instead exceed the Automatic Start parameter. This parameter isonly visible if the Automatic Start Stop parameter is set to Enabled. The value is measured in seconds.

11. Load Pulse PeriodThis parameter is used to select the period of time that will elapse between the start of pulse signals whilethe compressor is loading and the control signal is within the range defined by the proportional band. Theproximity of the control signal value to the set point determines for which portion of the period thecompressor will be loading. The value is measured in seconds.

12. Unload Pulse PeriodThis parameter is used to select the period of time that will elapse between the start of pulse signals whilethe compressor is unloading and the control signal is within the range defined by the proportional band. Theproximity of the control signal value to the set point determines for which portion of the period thecompressor will be unloading. The value is measured in seconds.

13. Minimum Capacity Slide PositionThis parameter is used to select the lowest allowable value for the capacity slide valve during normaloperation. If the value drops below this value, the compressor will load until the minimum position is reachedunless a capacity limitation is active. The maximum value of this parameter is the current value of theMaximum Capacity Slide Position parameter. The parameter may only be manually changed from the panelwhile it is operating in Local mode. If the panel is operating in remote mode, changes to this value must bemade through the sequence control. The value is measured in percent.

14. Maximum Capacity Slide PositionThis parameter is used to select the highest allowable value for the capacity slide valve during normaloperation. If the value rises above this value, the compressor will unload until the maximum position isreached unless a capacity limitation is active. The minimum value of this parameter is the current value ofthe Minimum Capacity Slide Position parameter. The value is measured in percent.

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15. Ramp Rate per MinuteThis parameter is used to select how quickly the set point approaches its chosen value after startup. Thevalue indicates the change per minute, and the maximum value, minimum value and units of the parameterare dependent on the chosen control signal:

• PressureIndicated in the panel pressure units as selected in the Panel Settings screen.

• TemperatureIndicated in the panel temperature units as selected in the Panel Settings screen.

• Remote Capacity SlideIndicated in percent.

ControlCompressor Control Parameters

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3.1.2 Control

Parameter Units Minimum Maximum Default

Control Mode Selection – See Description

Control Mode Select By DigitalInput Selection – See Description

Set Point Location Selection – See Description

Remote Set Point Units Selection – See Description

Maximum Capacity Slide to AllowStart Override Percent 0 % 100 % 70 %

Maximum Capacity Slide to AllowStart Percent 0 % 100 % 5 %

Capacity Slide Failed to UnloadShutdown Timer Seconds 35 s 600 s 180 s

Capacity Control Delay Seconds 0 s 120 s 15 s

Sequencer Overwrite LocalCapacity Parameters Selection – See Description

Zero Load Shutdown Timer Seconds 0 s 600 s 120 s

External Capacity Mode Selection – See Description

External Capacity Control Interface Selection – See Description

Suction Check Valve Close AssistPulse Timer Seconds 5 s 120 s 10 s

Control Mode After Shutdown Selection – See Description

1. Control ModeThis parameter is used to select which set of Capacity Control parameters is used by the panel. Whicheverset of parameters is selected here will be the visible set shown in the Capacity Control section above. Theoptions are:

• Capacity Control 1

• Capacity Control 2

• Capacity Control 3

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2. Control Mode Select By Digital InputThis parameter is used to select whether the capacity control mode is selected using a parameter or a DigitalInput point. If a Digital Input point is used, the compressor will be limited to Capacity Control 1 on a de-energized signal, and Capacity Control 2 on an energized signal. The parameter will only be visible if the SetPoint Selection Digital Input option is enabled in the panel configuration. The options are:

• Enabled

• Disabled

3. Set Point LocationThis parameter is used to select whether the capacity control set point is taken from the selected set ofCapacity Control parameters or from a Remote device. The options are:

• Local

• Remote

4. Remote Set Point UnitsThis parameter is used to select the units of measurement that will be used for remote set point control. Theparameter will only be visible if the Remote Set Point option is enabled in the panel configuration. Theoptions are:

• Pressure

• Temperature

• Slide Valve

5. Maximum Capacity Slide To Allow Start OverrideFor GEA Grasso Small and Medium compressors, if the compressor capacity slide position remains abovethe Maximum Capacity Slide To Allow Start parameter during the period of time dictated by the CapacitySlide Failed to Unload Shutdown Timer, the panel will compare the slide position to this value. If the capacityslide position is greater than this value for the duration of the Capacity Slide Failed to Unload ShutdownTimer, a shutdown will be issued. The value is measured in percent.

6. Maximum Capacity Slide To Allow StartThis parameter is used to select the maximum allowable position of the capacity slide when the compressoris instructed to start. If the capacity slide position is above this parameter when a start signal is received, thecompressor will unload until the slide position has dropped below the parameter before allowing thecompressor to start. The compressor will also unload to this position after the compressor is stopped. Thevalue is measured in percent.

7. Capacity Slide Failed to Unload Shutdown TimerThis parameter is used to select the amount of time the panel will wait for the compressor to unload, eitherbefore starting or after stopping, before a Capacity Slide Failed to Unload Shutdown will be annunciated.The value is measured in seconds.

8. Capacity Control DelayThis parameter is used to select the period of time that will elapse between the compressor starting andcapacity control being enabled. The value is measured in seconds.

9. Sequencer Overwrite Local Capacity ParametersThis parameter is used to select whether the local capacity control parameters may be overwritten byparameters from an external sequencer.

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10. Zero Load Shutdown TimerThis parameter is used to select the period of time that the capacity slide position may remain at the zeroload percentage before a shutdown condition will be annunciated. The value is measured in seconds.

11. External Capacity ModeThis parameter is used to determines if the external capacity exerts direct control over the load/unloadsolenoids or simply communicates the need for increased or decreased capacity to the compressor. Theoptions are:

• Direct Pulse Control

• Indirect Pulse Control

12. External Capacity Control Mode InterfaceThis parameter is used to select the method of communication used between the panel and any remotecapacity control devices. The options are:

• Network

• Hard Wired

13. Suction Check Valve Close Assist Pulse TimerThis parameter is used to select the length of the control pulses used to operate close assist feature of themotorized suction check valve. The parameter will only be visible if the Suction Check Valve Close Assistoption in the compressor configuration is set to Normally Open Pulsed or Normally Closed Pulsed. The valueis measured in seconds.

14. Control Mode After ShutdownThis parameter is used to select whether the compressor will be permitted to resume operation in remotemode following a shutdown condition. The options are:

• Enabled

• Disabled

3.2 Compressor Operating Data

Operating Data is displayed on the main Omni Compressor screen detailed in Section 2.5.1, page 25. Below is alist of standard operating variables and a brief description of their functions.

3.2.1 Analog Inputs/ Outputs

Hint!

The assignment of the data points is dependent on the configuration. Check the electricalconnection diagram to identify the exact layout of the data points.

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Value Description

Suction Pressure This value displays the reading of the suction pressure transducer. The value isdisplayed in the current pressure units of the panel.

Discharge Pressure This value displays the reading of the discharge pressure transducer. The value isdisplayed in the current pressure units of the panel.

Oil Pressure This value displays the reading of the oil pressure transducer. The value isdisplayed in the current pressure units of the panel.

Oil Filter Pressure

This value displays the reading of the oil filter pressure transducer. This point willonly be displayed if the oil filter is configured with a single pressure transducer.Depending on configuration options, this may be either an input or outputtransducer.

Oil Filter Inlet PressureThis value displays the reading of the oil filter pressure transducer. This point willonly be displayed if the oil filter is configured with both an input and outputtransducer. The value is displayed in the current pressure units of the panel.

Oil Filter Outlet Pressure

This value displays the reading of the pressure transducer located at the oil filteroutlet valve. This point will only be displayed if the oil filter is configured with bothan input and output transducer. The value is displayed in the current pressureunits of the panel.

Suction Temperature This value displays the reading of the suction temperature sensor. The value isdisplayed in the current temperature units of the panel.

Discharge Temperature This value displays the reading of the discharge temperature sensor. The value isdisplayed in the current temperature units of the panel.

Oil Temperature This value displays the reading of the oil temperature sensor. The value isdisplayed in the current temperature units of the panel.

Oil SeparatorTemperature

This value displays the reading of the oil separator temperature sensor. The valueis displayed in the current temperature units of the panel.

Capacity Slide PositionThis value displays the current reading of the capacity slide position sensor. Thevalue is displayed in percent. This point may monitor either a 4-20 mA signal or apotentiometer input.

Volume Slide PositionThis value displays the current reading of the volume slide position sensor. Thevalue is measured in percent. This point may monitor either a 4-20 mA signal or apotentiometer input.

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Value Description

Primary Slide Position orSwept Volume in %

This value displays the current reading of the primary slide position or sweptvolume. It is used for applications were an analog output module is provided toretransmit the current reading of the primary slide position sensor. The value ismeasured in percent. The default location for the module is dependent on wherethe panel was configured.

Motor Current

This value displays the current reading of the compressor motor current sensor.The value is measured in Amps. It will not appear on a slice if Motor StarterCommunication is enabled in the configuration. This point may monitor either a4-20 mA signal or a current transformer input.

3.2.2 Standard Calculated Values

Hint!

These entries in the operating data table are not tied to a default position in the I/O system.They are calculated by the system.

Value Description

Loop timeThis value represents the amount of time the system requires to execute allcustom logic once and update all inputs and outputs. The value is measured inseconds.

Oil Filter DifferentialThis value displays the calculated differential in the oil filter. The calculation usedis dependent on the compressor’s configuration. The value is measured in thecurrent pressure units of the panel.

Oil DifferentialThis value displays the calculated oil differential in the compressor. The calculationused is dependent on the compressor’s configuration. The value is measured inthe current pressure units of the panel.

Motor CurrentThis value displays the value of the motor current as read through the motorstarter communication. It will not be visible if Motor Starter communication has notbeen enabled in the configuration. The value is measured in Amps.

Cycle On TimerThis value displays the remaining time before the compressor will restartautomatically. It will only be visible if Automatic Start/Stop is enabled in theconfiguration. The value is measured in seconds.

Cycle Off TimerThis value displays the remaining time before the compressor will stopautomatically. It will only be visible if Automatic Start/Stop is enabled in theconfiguration. The value is measured in seconds.

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Value Description

Motor Start to Start Timer This value displays the remaining time that must elapse after the compressor isstarted before it may be safely started again. The value is measured in seconds.

Motor Stop To Start Timer This value displays the remaining time that must elapse after the compressor isstopped before it may be safely started again. The value is measured in seconds.

Oil Drain TimerThis value displays the remaining time that the compressor must wait for oil todrain from the system before the compressor may be safely started. The value ismeasured in seconds.

Accumulated Run TimeHours

This value displays the total amount of time the compressor has run. The value ismeasured in hours.

Capacity Percentage This value displays the current reading of the capacity slide. The value ismeasured in percent.

kWh Demand This value displays the currently estimated kWh demand of the compressor. Thevalue is measured in kWh.

3.2.3 Digital Inputs/ Outputs

Hint!

The assignment of the data points is dependent on the configuration. Check the electricalconnection diagram to identify the exact layout of the data points.

Value Description

Emergency StopThis input monitors the status of the Emergency Stop switch. It will be energizedfor normal panel operation. If this input ever becomes de-energized, anEmergency Stop shutdown will be triggered. The states are On or Off.

Compressor Interlock

This input monitors the status of the compressor run feedback module. It will beenergized while the compressor is running, and de-energized while thecompressor is stopped. If this input ever becomes de-energized while thecompressor is running, or energized while the compressor is stopped, an interlockalarm condition will be triggered. The states are On or Off.

Oil Pump Interlock

This input monitors the status of the oil pump run feedback module. It will beenergized while the oil pump is running, and de-energized while the oil pump isstopped. If this input ever becomes de-energized while the oil pump is running, orenergized while the oil pump is stopped, an interlock alarm condition will betriggered. The states are On or Off.

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Value Description

External Unload

This input monitors the status of a remote compressor control device. This modulewill only be used if the panel is operating in Remote Mode. It will be energized toremotely instruct the compressor to unload, and de-energized at all other times.The states are On or Off.

External Load

This input monitors the status of a remote compressor control device. This modulewill only be used if the panel is operating in Remote Mode. It will be energized toremotely instruct the compressor to load, and de-energized at all other times. Thestates are On or Off.

External Start/Stop

This input monitors the status of a remote compressor control device. This modulewill only be used if the panel is operating in Remote Mode. It will be energized toremotely instruct the compressor to start, and de-energized to instruct it to stop.The states are On or Off.

Start PermissiveThis input monitors whether the compressor is currently allowed to start. As longas it is energized, the compressor may start normally, otherwise any instruction tostart will be ignored. The states are On or Off.

Low Oil LevelThis input monitors an oil level float switch. It will be energized for normaloperation of the panel, and will only de-energize if the oil level falls below the levelof the switch. The states are On or Off.

Aux Shutdown #1This input monitors a miscellaneous shutdown condition for the compressor. It willbe energized for normal panel operation. If this input ever becomes de-energized,a shutdown annunciation will be triggered. The states are On or Off.

Aux WarningThis input monitors a miscellaneous warning condition for the compressor. It willbe energized for normal panel operation. If this input ever becomes de-energized,a warning annunciation will be triggered. The states are On or Off.

Set Point Select

This input is used to control which set point is currently being used. This modulewill only be enabled if the compressor is configured for multiple set points. Setpoint 2 will be enabled if the module is energized, and set point 1 will be enabled ifit is de-energized. The states are On or Off.

Auxiliary Shutdown #2This input monitors a miscellaneous shutdown condition for the compressor. It willbe energized for normal panel operation. If this input ever becomes de-energized,a shutdown annunciation will be triggered. The states are On or Off.

Aux Warning #2This input monitors a miscellaneous warning condition for the compressor. It willbe energized for normal panel operation. If this input ever becomes de-energized,a warning annunciation will be triggered. The states are On or Off.

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Value Description

Compressor Motor StartThis output activates the starter for the compressor motor. It will energize when thecompressor is instructed to start, and will be de-energized at all other times. Thestates are On or Off.

Oil Pump Motor StartThis output activates the starter for the oil pump motor. It will be energizedwhenever the oil pump is instructed to run, and will be de-energized at all othertimes. The states are On or Off.

Load SolenoidThis output activates the compressor load solenoid. It will be energized wheneverthe compressor is loading the solenoid, and will be de-energized at all other times.The states are On or Off.

Unload SolenoidThis output activates the compressor unload solenoid. It will be energizedwhenever the compressor is unloading the solenoid, and will be de-energized at allother times. The states are On or Off.

Shutdown StatusThis output signalizes whether the panel has entered a shutdown state. It will beenergized for normal panel operation and will de-energize any time a shutdowncondition is annunciated. The states are On or Off.

Ready For RemoteThis output signalizes whether the compressor is currently permitted to run viaexternal control from a remote device. It will be energized when remote mode ispermitted and disabled at all other times. The states are On or Off.

Oil CoolingThis output activates the oil cooing solenoid. It will be energized whenever the oilcooling should be energized as determined by the type of oil cooling system, andde-energized at any other time. The states are On or Off.

Unloaded Start This output activates the solenoid of the compressor unload cycle. The states areOn or Off.

Oil Separator Heater This output activates the heater for the oil separator. It will be energized duringcompressor standstill. The states are On or Off.

Warning StatusThis output signalizes whether the panel has entered a warning state. It will beenergized for normal panel operation and will de-energize any time a warningcondition is annunciated. The states are On or Off.

Motor Start To Start TimerActive

This output signalizes whether the motor start to start timer is currently active. Itwill be energized while the timer is running and de-energized at all other times.The states are On or Off.

Green/White Lamp This output activates the white lamp on the panel light stack. The states are On orOff.

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Value Description

Yellow LampThis output activates the yellow lamp on the panel light stack. If the panel hasannunciated a warning condition, this point will be energized. Otherwise, it will bede-energized. The states are On or Off.

Red LampThis output activates the red lamp on the panel light stack. If the panel hasannunciated a shutdown condition, this point will be energized. Otherwise, it will bede-energized. The states are On or Off.

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3.3 Normal Operating States

This section details the four normal compressor states which the compressor may be in while a shutdowncondition has not been annunciated.

3.3.1 Stopped Description

This mode of operation indicates that the compressor is not running and automatic start is disabled. While thepanel is in this mode, the red STOP button will be solidly illuminated.

3.3.2 Starting Description

This mode of operation indicates that the compressor is in the process of starting. During this period, thecompressor will unload to its minimum position. The compressor will remain in this mode as long as theconditions required for the compressor to start are not met and the compressor has not entered a shutdowncondition. While the panel is in this mode, the green START button will be blinking.The starting sequence follows the steps displayed below:

1. Check Oil Pump Circulation (optional)During this step, the panel will check that the oil temperature is greater than or equal to the value of the OilPump Circulation Temperature Set Point. If the oil temperature does not meet this condition, the oil pump willrun to attempt to bring the temperature reading up to the appropriate value. If the temperature has notreached the selected value after a period of time specified in the Oil Pump Circulation Shutdown Timerparameter, a shutdown will be annunciated. This step will only be displayed if the Oil Pump Circulation Modeparameter is set to Temperature.

2. Check Drive ConditionsDuring this step, the panel will check that the time periods specified for example in the Motor Start To StartTimer and Motor Stop To Start Timer parameters have elapsed.

3. Check Oil Drain TimerDuring this step, the panel will check whether the compressor must be drained of oil before being permittedto start. If the oil must be drained, the compressor will wait until the time period specified in the Oil DrainTimer parameter has elapsed.

4. Check Control Signal CyclingDuring this step, the panel will check the conditions of the compressor to ensure that the control value is in avalid state to start. This step will only be displayed if the Automatic Start Stop parameter is set to Enabled.

5. Check Permissive StartDuring this step, the panel will wait for the permissive start signal to become energized.

6. Check Pump Down Build To PressureDuring this step, the compressor will wait until the compressor suction pressure has risen to an acceptablevalue. This step will only be displayed if the Pump Down Mode is set to Automatic in the configuration.

7. Check Discharge Check ValveDuring this step, the panel will check to ensure that the motorized discharge check valve, if applicable, hasopened within an acceptable period of time.

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8. Check Slide PositionDuring this step, the panel will ensure that the position of the capacity slide is below the value of theCapacity Slide Allowed To Start parameter.

9. Retrofit Oil Drain Input EnergizedDuring this step, the panel will wait for the compressor Oil Drain Input to become energized. This step willonly be displayed if the compressor Brand is set to a Hall with Internal/No Pump in the configuration.

10. Check Prelube Timer (optional)During this step, the oil pump will be run for a period of time specified in the Oil Pump Prelube Timerparameter. This step will not be displayed if the compressor is set to a Grasso in the configuration.

11. Check Oil DifferentialDuring this step, the panel will check to ensure that the oil differential pressure is at an acceptable value.

12. Send Motor Start SignalDuring this step, the panel will energize the compressor motor starter output.

13. Check InterlockDuring this step, the panel will check to ensure that the motor starter interlock has become energized withinan appropriate amount of time and that the motor current reading is at an acceptable value.

3.3.3 Running Description

This mode of operation indicates that the compressor has successfully started. As long as it remains in thismode, the compressor will operate normally as dictated by the capacity control parameters. While in this mode,the green START button will be solidly illuminated.

3.3.4 Stopping Description

This mode of operation indicates that the compressor is in the process of stopping. During this period, thecompressor will unload to its minimum position before stopping the compressor. While the panel is in this mode,the STOP button will be blinking.The stopping sequence follows the steps displayed below:

1. Check Slide PositionDuring this step, the panel will ensure that the position of the capacity slide is below the value of theCapacity Slide Allowed To Start parameter.

2. Send Motor Stop SignalDuring this step, the panel will send the command to stop the compressor.

3. Check InterlockDuring this step, the panel will check to ensure that the motor starter interlock has become de-energizedwithin an appropriate amount of time and that the motor current reading is at an acceptable value.

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4 ANNUNCIATIONS

4.1 Shutdowns

Shutdown annunciations are triggered when a condition occurs that requires the system to be disabled to protectone or more of its components. Once a shutdown is annunciated, the user may acknowledge it at any time. Anacknowledged shutdown will clear if the issue that triggered it is resolved, but a shutdown that has not beenacknowledged will persist until a user marks it as acknowledged.

List and Description of Shutdowns

Shutdown Explanation

Loss of Communications I/ONetwork

This annunciation will be triggered if the panel loses its connection to an I/OBus Coupler.

Watchdog IO Network This annunciation will be triggered if the panel is connected properly to anI/O Bus Coupler, but one or more of the connected slices are not functioningproperly.

High Motor Current Shutdown This annunciation will be triggered if the compressor motor current exceedsthe value entered in the High Motor Current Shutdown parameter for a periodof time defined in the High Motor Current Shutdown Timer parameter.

Sensor Failure Shutdown This annunciation will be triggered if the reading of a sensor is outside itsdefined range. This annunciation will only be triggered if the failed sensor iscritical to the safe operation of the compressor.

High Motor Speed Shutdown This annunciation will be triggered if the compressor motor speed exceedsthe value entered in the High Motor Speed Shutdown parameter.

Low Motor Speed Shutdown This annunciation will be triggered if the compressor motor speed falls belowthe value entered in the Low Motor Speed Shutdown’ parameter.

Low Motor Current Shutdown This annunciation will be triggered if the compressor motor current fallsbelow the value entered in the Low Motor Current Shutdown parameter for aperiod of time defined in the Low Motor Current Shutdown Timer parameter.

Capacity Slide Failed ToUnload

This annunciation will be triggered if, either before starting or after stopping,the compressor has not unloaded to its minimum position for a time period inexcess of the value selected in the Capacity Slide Failed To UnloadShutdown Timer parameter.

Low Suction PressureShutdown

This annunciation will be triggered if the suction pressure reading of thecompressor drops below the value entered in the Low Suction PressureShutdown parameter.

AnnunciationsShutdowns

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List and Description of Shutdowns

Shutdown Explanation

High Discharge TemperatureShutdown

This annunciation will be triggered if the discharge temperature reading ofthe compressor exceeds the value entered in the High DischargeTemperature Shutdown parameter.

High Discharge PressureShutdown

This annunciation will be triggered if the discharge pressure reading of thecompressor exceeds the value entered in the High Discharge PressureShutdown parameter.

High Oil SeparatorTemperature Shutdown

This annunciation will be triggered if the oil separator temperature readingexceeds the value of the High Oil Separator Temperature Shutdownparameter. This shutdown will only be annunciated if the compressor is in thestarting or running states.

Low Oil Separator TemperatureShutdown

This annunciation will be triggered if the oil separator temperature readingfalls below the value of the Low Oil Separator Temperature Shutdownparameter. This shutdown will only be annunciated if the compressor is in thestarting or running states.

Low Oil Level Shutdown This annunciation will be triggered if the Low Oil Level Input becomes de-energized for a period of time in excess of the value entered in the Low OilLevel Shutdown Timer.

High Oil TemperatureShutdown

This annunciation will be triggered if the oil temperature reading exceeds thevalue of the High Oil Temperature Shutdown parameter. This shutdown willonly be annunciated if the compressor is in the starting or running states.

Low Oil Temperature Shutdown This annunciation will be triggered if the oil temperature reading falls belowthe value of the Low Oil Temperature Shutdown parameter. This shutdownwill only be annunciated if the compressor is in the starting or running states.

High Oil Differential PressureShutdown

This annunciation will be triggered if the oil differential pressure readingexceeds the value of the High Oil Differential Pressure Shutdown parameter.This shutdown will only be annunciated if the compressor is in the starting orrunning states.

Low Oil Differential PressureShutdown

This annunciation will be triggered if the oil differential pressure reading fallsbelow the value of the Low Oil Differential Pressure Shutdown parameter.This shutdown will only be annunciated if the compressor is in the starting orrunning states.

High Oil Filter DifferentialShutdown

This annunciation will be triggered if the oil filter differential pressure readingexceeds the value of the High Oil Filter Differential Pressure Shutdownparameter. This shutdown will only be annunciated if the compressor is in thestarting or running states.

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List and Description of Shutdowns

Shutdown Explanation

Oil Pump Illegal InterlockShutdown

This annunciation will be triggered if the oil pump interlock input becomesenergized while the oil pump start output is de-energized..

Oil Pump 1 Illegal InterlockShutdown

This annunciation will be triggered if the interlock input of the lead oil pump ina dual pump system becomes energized while the lead pump start output isde-energized. This annunciation will only be enabled if the compressor isconfigured with dual oil pumps.

Oil Pump 2 Illegal InterlockShutdown

This annunciation will be triggered if the interlock input of the lag oil pump ina dual pump system becomes energized while the lag pump start output isde-energized. This annunciation will only be enabled if the compressor isconfigured with dual oil pumps.

Oil Pump Loss of InterlockShutdown

This annunciation will be triggered if the oil pump interlock input becomes de-energized while the oil pump start output is energized.

High Oil Separator LevelShutdown

This annunciation will be triggered if the level in the oil separator remainsabove the high level float switch for a period of time greater than the High OilSeparator Shutdown Timer parameter.

Compressor Illegal InterlockShutdown

This annunciation will be triggered if the compressor run status inputbecomes energized while the compressor start output is de-energized.

Illegal Compressor MotorCurrent Shutdown

This annunciation will be triggered if the motor current of the compressor ishigher than the percentage of the motor FLA as indicated by the value of theIllegal Compressor Motor Current Shutdown while compressor should bestopped.

Compressor Loss ofCompressor Interlock

This annunciation will be triggered if the compressor run status inputbecomes de-energized while the compressor start output is energized.

Analog Input Count MismatchShutdown

This annunciation will be triggered if the number of Analog Input slicesdetected by the panel is different from the number called for in theconfiguration.

Analog Output Count MismatchShutdown

This annunciation will be triggered if the number of Analog Output slicesdetected by the panel is different from the number called for in theconfiguration.

Digital Input Count MismatchShutdown

This annunciation will be triggered if the number of Digital Input slicesdetected by the panel is different from the number called for in theconfiguration.

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List and Description of Shutdowns

Shutdown Explanation

Digital Output Count MismatchShutdown

This annunciation will be triggered if the number of Digital Output slicesdetected by the panel is different from the number called for in theconfiguration.

Analog Slice Not RecognizedShutdown

This annunciation will be triggered if a slice in the I/O system is not of a typesupported by the GEA Omni™ panel

Low Suction SuperheatShutdown

This annunciation will be triggered if the calculated suction superheat valuefalls below the value of the Low Suction Superheat Shutdown parameter.This shutdown will only be issued if superheat annunciations have beenenabled through the Superheat Annunciations parameter.

High Suction SuperheatShutdown

This annunciation will be triggered if the calculated suction superheat valueexceeds the value of the High Suction Superheat Shutdown parameter. Thisshutdown will only be issued if superheat annunciations have been enabledthrough the Superheat Annunciations parameter.

Low Discharge SuperheatShutdown

This annunciation will be triggered if the calculated suction superheat valuefalls below the value of the Low Discharge Superheat Shutdown parameter.This shutdown will only be issued if superheat annunciations have beenenabled through the Superheat Annunciations parameter.

High Discharge SuperheatShutdown

This annunciation will be triggered if the calculated discharge superheatvalue falls below the value of the High Discharge Superheat Shutdownparameter. This shutdown will only be issued if superheat annunciationshave been enabled through the Superheat Annunciations parameter.

Low Outlet TemperatureShutdown

This annunciation will be triggered if the outlet temperature reading fallsbelow the value of the Low Outlet Temperature Shutdown parameter. Thisshutdown will only be annunciated if the compressor is in the starting orrunning states.

Zero Load Shutdown This annunciation will be triggered if the compressor is running and thecapacity slide remains below the zero load position for a set period of time.

No Oil Flow Detected Shutdown This annunciation will be triggered if the flow switch in the compressorhousing becomes de-energized while the compressor is running, or if theswitch does not become energized within a set period of time once thecompressor is started. This annunciation will only be enabled for Sabroecompressors.

Emergency Stop Shutdown This annunciation will be triggered if the Emergency Stop input becomes de-energized or the Emergency Stop button is pressed.

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List and Description of Shutdowns

Shutdown Explanation

Power Reset Abort Shutdown This annunciation will be triggered if the duration of a power outage exceedsthe value of the Power Failure Restart Abort Timer. This annunciation willonly be issued if the Power Failure Restart Mode parameter is not toDisabled.

Pump Down Too LongShutdown

This annunciation will be triggered if the compressor remains in Pump Downmode for a period of time in excess of the value entered in the Pump DownMaximum Time parameter.

Discharge Check Valve FailedTo Open Shutdown

This annunciation will be triggered if the discharge valve did not open wheninstructed to do so by the panel. This annunciation will only be enabled if thecompressor is equipped with a motorized discharge check valve.

Discharge Check Valve FailedTo Close Shutdown

This annunciation will be triggered if the discharge valve did not close wheninstructed to do so by the panel. This annunciation will only be enabled if thecompressor is equipped with a motorized discharge check valve.

Oil Drain Failed To ClearShutdown

This annunciation will be triggered if the Oil Drain input does not de-energizewithin a set period of time after the compressor is instructed to start. Thisannunciation will only be enabled for Hall compressors.

Auxiliary Shutdown This annunciation will be triggered if the Auxiliary Shutdown input becomesde-energized. This shutdown will only be issued if the Auxiliary Shutdownoption has been enabled in the configuration.

AnnunciationsShutdowns

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4.2 Warnings

Warning annunciations are triggered when a condition occurs that is outside the normal operating conditions ofthe system and should be brought to a user’s attention, but is not severe enough that the entire system shouldbe shut down. All warning annunciations are momentary and will only remain triggered for as long as thecondition that caused them persist.

List and Description of Warnings

Warning Explanation

Math Block Units MismatchWarning

This annunciation will be triggered if the inputs of a Math block in the logicdiagram are expressed in different units.

Sensor Failure Warning This annunciation will be triggered if the reading of a sensor is outside itsdefined range. This annunciation will be triggered if the compressor cancontinue to run safely without the failed sensor.

High Motor Current Warning This annunciation will be triggered if the motor current reading exceeds thevalue obtained by subtracting the High Motor Current Warning Offsetparameter from the High Motor Current Shutdown parameter.

High Suction Pressure Warning This annunciation will be triggered if the suction pressure reading exceedsthe value obtained by subtracting the High Suction Pressure Warning Offsetparameter from the High Suction Pressure Warning parameter.

High Discharge TemperatureWarning

This annunciation will be triggered if the discharge temperature readingexceeds the value obtained by subtracting the High Discharge TemperatureWarning Offset parameter from the High Discharge Temperature Shutdownparameter.

High Discharge PressureWarning

This annunciation will be triggered if the discharge pressure reading exceedsthe value obtained by subtracting the High Discharge Pressure WarningOffset parameter from the High Discharge Pressure Shutdown parameter.

High Oil SeparatorTemperature Warning

This annunciation will be triggered if the oil separator temperature readingexceeds the value obtained by subtracting the High Oil SeparatorTemperature Warning Offset parameter from the High Oil SeparatorTemperature Shutdown parameter.

Low Oil Separator TemperatureWarning

This annunciation will be triggered if the oil separator temperature readingfalls below the value obtained by adding the Low Oil Separator TemperatureWarning Offset parameter to the Low Oil Separator Temperature Shutdownparameter.

High Oil Separator LevelWarning

This annunciation will be triggered if the oil separator high level inputbecomes de-energized for a period of time that exceeds the value of theHigh Oil Separator Level Warning Timer.

Operating manual | GEA Omni™Control panel

AnnunciationsWarnings

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List and Description of Warnings

Warning Explanation

High Oil Temperature Warning This annunciation will be triggered if the oil separator temperature readingexceeds the value obtained by subtracting the High Oil SeparatorTemperature Warning Offset parameter from the High Oil SeparatorTemperature Shutdown parameter.

Low Oil Temperature Warning This annunciation will be triggered if the oil temperature reading falls belowthe value obtained by adding the Low Oil Temperature Warning Offsetparameter to the Low Oil Temperature Shutdown parameter.

High Oil Filter DifferentialWarning

This annunciation will be triggered if the calculated oil filter differentialexceeds the value obtained by subtracting the High Oil Filter DifferentialWarning Offset parameter from the High Oil Filter Differential Shutdownparameter.

Illegal Oil Filter DifferentialPressure Warning

This annunciation will be triggered if the calculated value of the Oil FilterDifferential falls below -2 PSID.

Oil Pump Loss of InterlockAuxiliary 1 Warning

This annunciation will be triggered if the interlock input of the lead oil pump ina dual pump system becomes de-energized while the pump is supposed tobe running. This annunciation will only be enabled if the compressor isconfigured with dual oil pumps, and the first pump is selected as the leadpump. An annunciation will cause the lag pump to start.

Oil Pump Loss of InterlockAuxiliary 2 Warning

This annunciation will be triggered if the interlock input of the lead oil pump ina dual pump system becomes de-energized while the pump is supposed tobe running. This annunciation will only be enabled if the compressor isconfigured with dual oil pumps, and the second pump is selected as the leadpump. An annunciation will cause the lag pump to start.

Low Suction Pressure Warning This annunciation will be triggered if the compressor suction pressureexceeds the value obtained by subtracting the Low Suction PressureWarning Offset’ parameter from the Low Suction Pressure Shutdownparameter.

High Inlet TemperatureWarning

This annunciation will be triggered if the inlet temperature reading exceedsthe value of the High Inlet Temperature Warning parameter.

Low Inlet Temperature Warning This annunciation will be triggered if the inlet temperature reading falls belowthe value of the Low Inlet Temperature Warning parameter.

High Outlet TemperatureWarning

This annunciation will be triggered if the outlet temperature reading exceedsthe value of the High Outlet Temperature Warning parameter.

AnnunciationsWarnings

Operating manual | GEA Omni™Control panel

74 GEA Refrigeration North America, Inc. | E_801550_1 | Generated 10.04.2015

List and Description of Warnings

Warning Explanation

Low Outlet TemperatureWarning

This annunciation will be triggered if the outlet temperature reading fallsbelow the value of the Low Outlet Temperature Warning parameter.

High Oil Differential PressureWarning

This annunciation will be triggered if the calculated oil differential pressureexceeds the value obtained by subtracting the High Oil Differential PressureWarning Offset parameter from the High Oil Differential Pressure Shutdownparameter.

Low Oil Differential PressureWarning

This annunciation will be triggered if the calculated oil differential pressurefalls below the value obtained by adding the Low Oil Differential PressureWarning Offset parameter to the Low Oil Differential Pressure Shutdownparameter.

Low Oil Differential PressureRunning Dual Pump Warning

This annunciation will be triggered if the calculated oil differential pressurefalls below the value obtained by adding the Low Oil Differential PressureWarning Offset parameter to the Low Oil Differential Pressure Shutdownparameter. This annunciation will only be triggered if the compressor isconfigured with dual oil pumps and the compressor is in the running state. Anannunciation will cause the lag pump to start.

Low Oil Differential PressureStarting Dual Pump Warning

This annunciation will be triggered if the calculated oil differential pressurefalls below the value obtained by adding the Low Oil Differential PressureWarning Offset’ parameter to the Low Oil Differential Pressure Shutdownparameter. This annunciation will only be triggered if the compressor isconfigured with dual oil pumps and the compressor is starting. Anannunciation will cause the lag pump to start.

Lost Communication WithSequencer

This annunciation will be triggered if the panel loses its connection to thesequencer after a valid connection has been established.

Loss Of Remote Start Signal This annunciation will be triggered if the compressor is unable to find a validremote start signal when it is switched to remote mode after being manuallystarted.

Auxiliary Warning This annunciation will be triggered if the auxiliary warning input becomes de-energized. This warning will only be issued if the Auxiliary Warning optionhas been enabled in the configuration.

Operating manual | GEA Omni™Control panel

AnnunciationsWarnings

GEA Refrigeration North America, Inc. | E_801550_1 | Generated 10.04.2015 75

4.3 Notifications

List and Description of Notifications

Notifications Explanation

Need Updated Drawings This annunciation will be triggered if any change is made to the panel orconfiguration that will necessitate a change to the electrical drawings.

Upcoming Service RequiredNotification

This annunciation will be triggered if the panel is scheduled for maintenancewithin one hundred hours, as entered on the Maintenance chart in theService screen. This annunciation will only trigger if the compressor hasbeen running for at least five hundred hours. This notification will not beannunciated if service notifications have been disabled.

Past Due Service RequiredNotification

This annunciation will be triggered if the current service interval has not beenmarked as complete and one hundred hours have passed since the intervalin question came due. If this notification is cleared, the panel will wait for thecompressor to run for another one hundred hours and, if the service intervalstill has not been completed, will annunciate the notification again. Thenotification will continue to be annunciated in one hundred hour incrementsuntil the service interval is marked as completed. This notification will not beannunciated if service notifications have been disabled.

Service Required Notification This annunciation will be triggered once the runtime of the panel has reachedthe next required service interval, as entered on the Maintenance chart in theService screen. This notification will not be annunciated if servicenotifications have been disabled.

AnnunciationsNotifications

Operating manual | GEA Omni™Control panel

76 GEA Refrigeration North America, Inc. | E_801550_1 | Generated 10.04.2015

5 LIST OF ABBREVIATIONS

A ADMIN Administrator

ACK Acknowledge

C CT Current Transformer

CV Control Value

D DB Dead Band

E ESP Electronic Slide Position

I ICTD Integrated Circuit Temperature Detector(electronic temperature sensor whose current output is linearly proportional totemperature)

I/O Input/Output

L LD Compressor Loading

LP Load Pulse

LPI Linear Position Indicator

P PB Proportional Band

PI Proportional Integral Control

PLC Process Loop Control

PP Pulse Period

PS Parallel Slide

PSID Pounds per Square Inch Differential

PSIG Pounds per Square Inch Gauge

R RPM Revolutions per Minute

RT Real Time

RTD Resistance Temperature Detector

Operating manual | GEA Omni™Control panel

List of Abbreviations

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RTU Real Time Automation

S SP Set Point

T TS Tandem Slide

U UI User Interface

UL Compressor Unloading

UP Unload Pulse

V VI Volume Index

VNC Virtual Network Computing

List of Abbreviations

Operating manual | GEA Omni™Control panel

78 GEA Refrigeration North America, Inc. | E_801550_1 | Generated 10.04.2015

Operating manual | GEA Omni™Control panel

List of Abbreviations

GEA Refrigeration North America, Inc. | E_801550_1 | Generated 10.04.2015 79