mdp- packaged units - calor packaged manual_eng.pdf · description of the mdp packaged unit series...
TRANSCRIPT
Interklima S.A
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MDP- PACKAGED UNITS
INSTALLATION AND MAINTENANCE MANUAL
Interklima S.A
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Contents
Contents………………………………………………………………………………………. 2
1. Presentation…………………………………………………………………………. 3 2. Safety precautions…………………………………………………………………. 3 3. Description of the MDP range
3.1. General………………………………………………………………………. 4 3.2. Inspection upon receipt………………………………………………….. 5 3.3. Technical data table………………………………………………………. 6 3.4. Refrigerant charge………………………………………………………... 8
4. Dimensions………………………………………………………………….………. 9 5. Installation instructions
5.1. Handling and positioning……………………………………...…..…….. 14 5.2. Access…………………………………………………..…………...……… 16 5.3. Drain Pipe………………………………………………………………...…. 16 5.4. Electrical connection
5.4.1. Line connection …………………….…………….……………...…... 16 5.4.2. Control cable connection………………………………………...….. 17
Typical wiring diagrams…………………………………………….…………...……. 19 6. Automatic control
6.1. Control description………………………………………………...……… 22 6.2. User interface………………………………………………………...…….. 23
7. Operating instructions 7.1. Before start up……………………………………………………...……… 28 7.2. Starting and operating the unit…………………………...…………..… 28 7.3. To change set points………………………..………………………….... 29
8. Maintenance………………………………………………………………...………. 8.1 General………………………….…………………………………………..…… 30 8.2 Refrigeration circuit…………………………………………………………… 30 8.3 Condenser and evaporator coils …………………………………………… 30 8.4 Fans
8.4.1 Condenser fans …………………………………………………………. 30 8.4.2 Evaporator fans …………………………………………………………. 31
9. Trouble Shooting 9.1. Problems and corrective action in heating mode…………………… 32 9.2. Problems and corrective action in cooling mode…………………… 33 9.3. Table of alarms………………………………………………………….…. 35
Appendix 1……………………………………………………………………………… 36 Menu levels
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1.Presentation The scope of this manual is to provide the customer with all the necessary
instructions for the installation, start up, use and maintenance of the MDP series.
It is advisable to have the unit periodically inspected by one of the manufacturer’ s
service technicians to ensure the unit’s maximum life and reliability.
2. Safety precautions Please read carefully the following text before proceeding with the installation of the
unit.
Attention The installation and the maintenance of the unit must be carried out by competent
persons who have complete knowledge of the safety regulations valid in the place of
installation.
Attention
All electrical connections must be carried out in conformity with local regulations.
Attention Before attempting any electrical connections indicated on the electrical drawing first
make sure that the local electrical characteristics correspond to those indicated on
the unit’ s label.
Attention
The unit must be earthed in order to avoid any danger in case of insulation problems.
Attention The electric cables must never be in contact with any refrigeration lines or any
moving parts such as fans.
Attention Before carrying out the installation or any maintenance operation make sure that the
main power switch is turned off.
Danger Movement of the unit must be carried out using methods suitable for the unit’ s
weight.
Danger Unauthorized persons should never come into contact with the unit.
Danger Electrical parts should never be touched and any work on electrical parts should not
be carried out in the presence of water or humidity.
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Danger Any operation on any part of the unit that contains refrigerant under pressure should
be carried out only by authorized technicians.
Danger Do not touch the fins of the heat exchange coil since they are sharp and may cut
unprotected hands.
3. Description of the MDP PACKAGED unit series 3.1 General The MDP series of air-to-air packaged rooftop units (cooling only or heat pump
version) contains a wide range of units from 20 up to 240 KW.
The new series fulfils both aesthetically and technically the latest market need for
PACKAGED units . The compact appearance of the units is the result of detailed study and design at
Interklima. These units thus offer
• Reduced external dimensions
• Simple construction method providing easy installation and access for
maintenance
• Fittings to enable easy transport and on-site positioning
The equipment is completely factory assembled, tested and ready for installation
The units are constructed in two sections (evaporator – condenser) with a special
rigid steel frame and side panels
The frame is made of hot-dipped galvanized steel profiles externally powder coated
and enamel baked with RAL9002 at 50 – 70 micron
It incorporates a special EPDM. gasket that forms a thermal barrier, specially
developed and patented by Interklima .
. The side panels of the evaporator are of the double skin type with a rigid factory
injected polyurethane insulation of 40mm providing
• excellent thermal insulation
• sound reduction
• good mechanical strength
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The side panels of the condenser are of hot-dipped galvanized steel plate externally
powder coated. The evaporator fans are centrifugal with double width blades –
double inlet , forward curved . All fans are statically and dynamically balanced after
manufacture , thus eliminating any possibility of vibration .
.The 3-phase induction fan motors (380V/3ph/50Hz ) are of the totally enclosed fan-
cooled type (TEFC) with class F insulation and IP54 protection.
The filters are of the cassette type (50mm.), constructed with a Hot-dipped
galvanized steel frame . They are EU4 standard according to ASHRAE Std52-76
and are installed in the inlet .
The refrigeration circuit comprises of one , two or tandem scroll compressors . Each
refrigeration circuit has a thermal expansion valve, bi-flow filter drier, two way valves,
electromagnetic valve, and a four-way valve(if a Heat pump)
The electrical board is sealed (IP 55) and includes everything necessary for the
control and protection of the unit. Control of the unit is via microprocessor, details of
which are in section 6 below.
3.2 Inspection upon receipt Upon receipt of the units, you should check carefully that the items received
correspond to the delivery note.
Also check the unit to make sure that there is no damage due to transportation or
mishandling. In case that there are signs of damage to the unit, the forwarder must
be notified immediately by registered letter. All the necessary quality controls have
been incorporated into the manufacturing procedures thus ensuring that all units
leave the factory in perfect condition. No responsibility is assumed for any damages
that may subsequently occur, due to incorrect handling, storage or transportation of
the units.
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MDP Packaged Air Handling Units (Cooling + Heat pumps) Technical data table
Type MDP-20 MDP-30 MDP-42 MDP-48 MDP-58 MDP-66 kw 19,2 28,8 40,3 46,1 55,7 63,4 RT 5,5 8,2 11,5 13,1 15,8 18 Nominal Cooling Capacity R407c
BTU/H 65.455 98.182 137.455 157.091 189.818 216.000 kw 20 31 41 46 55 62 Nominal Heating Capacity R407c
kcal/h 17.338 26.419 35.501 39.629 47.059 53.664 kw 20 30 42 48 58 66 RT 5,7 8,5 11,9 13,6 16,5 18,8 Nominal cooling capacity R22
BTU/H 68.182 102.273 143.182 163.636 197.727 225.000 kw 21 32 43 48 57 65 Nominal heating capacity R22
kcal/h 18.060 27.520 36.980 41.280 49.020 55.900 Material Galvanized steel Construction Colour Light grey-beige (RAL 9002)
Insulation (evaporator side) 40 mm injected polyurethene-Double wall panels-Thermal barrier frames Compressor type SCROLL Quantity 1 1 1 2 2 2 Capacity steps 1 1 1 2 2 2 Absorbed power (cooling/heating) kw 4,7/4,8 8,7/8,8 10,2/10,3 12,1/12,2 14,4/14,6 16,4/16,6 Nominal operating current A 8,41/8,72 14,5/14,6 17,8/18,0 21,7/21,8 29,0/29,1 30,6/30,8 Maximum operating current Α 12,1 20 27 34 40 44 Carter resistance w 70 70 70 140 140 140 Electrical characteristics 400-3-50 Condenser High capacity cross finned coil with internally finned tubes and louver fins Condenser Fan Type Axial Quantity 1 1 1 2 2 2 Airflow m³/h 9.000 8.900 8.800 17.400 16.800 16.000 Speed RPM 830 830 830 820 820 820 Absorbed power kw 0,46 0,46 0,46 0,94 1 1 Nominal operating current Α 3 3 3 6 6 6 Maximum operating current Α 1 1 1 2 2 2 Electrical characteristics 240-1-50 Evaporator Type Cross finned coil -Copper tubes/Aluminium fins Fin distance mm (fins / 1") 2,5 (10)
Face area m² 0,412 0,67 0,865 1,014 1,248 1,404 Rows 4 4 4 4 4 4 Evaporator Fan Type Centrifugal double inlet , forward curved Size 2x9-9 2x9-9 2x10-10 2x12-12 2x12-12 2x12-12 Number of fans 1 1 1 1 1 1 Nominal airflow m³/h 5.800 7.700 9.100 11.250 12.800 12.800 Speed RPM 1.014 867 714 732 611 621
Absorbed power kw 0,47 0,92 1,35 1,47 1,53 1,87 Available external static pa 100 Type of drive Tapered bush pulleys + V belts Fan Motor type Squirrel cage TEFC , insulation class F , IP55 Installed power kw 1,1 1,5 1,5 2,2 2,2 3 Speed RPM 1.430 1.430 1.430 1.430 1.430 1.425 Nominal operating current Α 2,5 3,4 3,4 5 5 6,6 Electrical characteristics 400-3-50 Total absorbed power (cooling/heating) kw 6,3/6,4 10,7/10,8 12,2/12,3 15,2/15,3 17,6/17,8 20,4/20,6 Total Nominal operating current Α 13,9/6,2 20,4/11,0 23,4/14,4 32,0/12,8 40,0/20,1 42,6/13,4 Total Maximum operating current Α 18 26 33 45 51 57 Power cables cross section mm² 6 10 16 16 16 25 Fuses 3x25 3x32 3x40 3x50 3x63 3x63 Voltage operating limits V 350-450 V Refrigerant circuit Expansion device Thermal expansion valves Refrigerant type R22 or R407c Air Filters Media pleated EU4 50 mm or Aluminium mesh EU3 50 mm Noise level at 3 m dbA 57 59 59 62 62 62
1.304 1.304 1.610 1.916 1.916 1.916 1.996 1.996 2.149 2.149 2.149 2.149
Dimensions 1.424 1.424 1.424 1.424 1.730 1.730 Shipping weight kg 685 685 750 800 900 1.100
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MDP Packaged Air Handling Units (Cooling + Heat pumps) Technical data table
Type MDP-82 MDP-100 MDP-115 MDP-135 MDP-165 MDP-195 MDP-240 kw 78,7 96,0 110,4 129,6 158,4 187,2 230,4 RT 22,4 27,3 31,4 36,8 45,0 53,2 65,5 Nominal cooling capacity
R407C BTU/H 268.364 327.273 376.364 441.818 540.000 638.182 785.455 kw 77 95 109 127 156 188 242 Nominal heating capacity
R407C kcal/h 66.048 81.734 94.118 108.979 133.747 161.818 208.051 kw 82 100 115 135 165 195 240 RT 23,3 28,4 32,7 38,4 46,9 55,4 68,2
Nominal cooling capacity R22 BTU/H 279.545 340.909 392.045 460.227 562.500 664.773 818.182 kw 80 99 114 132 162 196 252
Nominal heating capacity R22 kcal/h 68.800 85.140 98.040 113.520 139.320 168.560 216.720 Material Galvanized steel
Construction Colour Light grey-beige (RAL 9002) Insulation (evaporator side) 40 mm injected polyurethene-Double wall panels-Thermal barrier frames Compressor type SCROLL Quantity 2 2 4 4 4 4 4 Capacity steps 2 2 4 4 4 4 4 Absorbed power (cooling/heating) kw 20,4/20,6 24,6/24,7 28,9/29,1 32,6/32,8 41,2/41,5 49,2/49,4 65,2/66,5 Nominal operating current A 35,6/35,8 43,6/44,0 58,0/58,2 61,2/61,5 71,2/71,4 86,8/87,4 111,2/112,3 Maximum operating current Α 54 64 80 88 108 128 160 Carter resistance w 140 140 280 280 280 280 280 Electrical characteristics 400-3-50 Condenser High capacity cross finned coil with internally finned tubes and louver fins Condenser Fan Type Axial Quantity 4 4 4 6 6 6 8 Airflow m³/h 32.000 32.000 31.000 48.000 52.000 52.000 70.000 Speed RPM 800 800 800 800 800 800 800 Absorbed power kw 2 2 2 3 3 3 4 Nominal operating current Α 12 12 12 18 18 18 24 Electrical characteristics 240-1-50 Evaporator Type Cross finned coil -Copper tubes/Aluminium fins Fin distance mm (fins / 1") 2,5 (10) Face area m² 1,716 2,232 2,604 2,883 3,249 3,591 3,759 Rows 4 4 4 4 4 4 6 Evaporator Fan Type Centrifugal double inlet , forward curved Size 2x15-15 2x18-18 2x18-18 2x18-18 2x500 2x500 2x500 Number of fans 1 1 1 1 1 1 1 1 Nominal airflow m³/h 15.500 15.500 19.400 22.340 26.200 30.000 34.000 38.000 Speed RPM 750 637 641 655 668 640 684 Absorbed power kw 2,93 2,69 3,3 5 6,2 6,55 8,5 Available external static pa 100 Type of drive Tapered bush pulleys + V belts Fan Motor type Squirrel cage TEFC , insulation class F , IP55 Installed power kw 3 4 4 5,5 7,5 9 11 Speed RPM 1.425 1.425 1.425 1430 1.450 1.450 1.450 Nominal operating current Α 6,6 9 9 11,4 15,4 18,5 22,5 Electrical characteristics 400-3-50 Total absorbed power (cooling/heating) kw 25,4/25,6 30,6/30,7 34,9/35,1 41,1/41,3 51,7/52,0 61,2/61,4 80,2/81,5 Total Nominal operating current Α 53,6/24,4 64,0/25,0 79,0/79,2 90,6/90,9 104,6/104,8 123,3/123,9 157,5/158,8 Total Maximum operating current Α 73 85 101 117 141 165 207 Power cables cross section mm² 25 35 50 70 95 120 150 Fuses 3x80 3x100 4x125 4x125 4x160 4x200 4x250 Voltage operating limits V 350-450 V Refrigerant circuit Expansion device Thermal expansion valves Refrigerant type R22 or R407c Air Filters Media pleated EU4 50 mm or Aluminium mesh EU3 50 mm Noise level at 3 m dbA 66 66 66 68 68 68 70
1.916 2.069 2.069 2.069 2.069 2.069 2.069 2.914 3.220 3.373 4.291 4.750 4.750 5.748
Dimensions 1.730 1.883 1.883 2.036 2.342 2.495 2.495 Shipping weight kg 1.370 1.600 1.915 2.230 2.470 2.770 3.100
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Notes 1. Validity of above capacities : Summer 27 °C db/19 °C wb on coil-35 °C ambient Winter 20 °C on coil-7 °C db/80% rh ambient 2. Limits of operation Ambient -10 °C - 45 °C. Nominal air flow +- 10% On coil db 0 °C - 35 °C 3. Given cables cross sections are only indicative. Always consult local regulations 4. Units are shipped factory wired, charged and run tested. 5. All units are microprocessor controlled. Optional connection interface for BMS via modbus protocol is available. 6. Leave at least 1,5 m of distance from condenser inlet(s) and 2 m above condenser fans discharge 7. Do not install ducts and/or air silencers on condenser fans discharge. 8. Options like mixing boxes, return fans, hot water or electric heating coils are not included in the standard version. Always consult the manufacturer for such options, including external static other than 100 pa 3.4 Refrigerant charge All units are factory charged with R22 or alternatively with other types of refrigerant.
The type and quantity of refrigerant charge is clearly marked on the technical
characteristics label on the unit. Quantities of refrigerant charge are given in the table
below.
MDP TYPE MDP-20 MDP-30 MDP-42 MDP-48 MDP-58 MDP-66
REFRIGERATION CIRCUITS NUMBER
1 1 1 2 2 2
R22 CHARGE gr PER CIRCUIT 9000 9000 10000 6500 7500 9000
MDP TYPE MDP-82 MDP-100 MDP-115 MDP-135 MDP-165 MDP-195
REFRIGERATION CIRCUITS NUMBER
2 2 2 2 2 2
R22 CHARGE gr PER CIRCUIT 11000 14000 20000 19000 25000 26000
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4. DIMENSIONS
MDP-020-40 mm
MDP-030 -40 mm
MDP-042-40 mm
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MDP-066-40 mm
MDP-058-40 mm
MDP-048-40 mm
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MDP-082-40 mm
MDP-100-40 mm
MDP-115-40 mm
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MDP-135-40 mm
MDP-165-40 mm
MDP-195-40 mm
MDP-240-40mm
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5. Installation instructions 5.1 Handling and positioning
Units should be handled with care during moving and positioning. Do not push the
unit on irregular ground. Use a forklift or a crane to place the unit in its final
installation position. The base of the unit is specially designed for forklift use. When
using a forklift always leave enough space between the unit and the forklift beam, as
shown in figure 1. Avoid abrupt forklift movements.
figure 1
To position the units by crane pass steel rods through the special holes which are in
the base. Attach belts and use a crane appropriate to the weight (see the technical
data table) and height of the unit.
Important information Before raising the equipment completely it is good practice to lift it slightly to check
the belt and steel bar positioning.
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Important All units of the MDP series are air cooled. Air circulation is therefore highly important
and should not be obstructed in any way. Any obstacles that interfere with the air flow
can dramatically decrease the unit performance, creating situations of unacceptably
high pressures, or even prevent the unit from functioning altogether..
Axial fans, as those installed on the MDP units are not suitable for high external
resistances to air flow. For this reason there must be no obstacles nearer to the unit
than the distance in figure 3.
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5.2 Access Access to the evaporator section is via doors while to the rest of the unit via
removable panels. The doors open in two directions with special chrome plated
fixings and handles. The doors can also be easily completely removed if required.
The removable panels open with special tools. The electrical panel can only be
opened by the use of a special key (provided with the unit).
5.3 Drain- pipe . The following system is proposed for the correct drainage of the unit in order that
condensation from the heat exchange coil does not remain inside the unit.
CONSTRUCTION DETAIL OF DRAIN PIPE
A> NEGATIVE PRESSURE OF COIL SECTIONB> A/2
5.4 Electrical connection 5.4.1 Line connection Before attempting any electrical connection to the unit, make sure that the local
electrical network characteristics ( i.e. voltage, number of phases and frequency )
match those of the unit, as indicated on the technical characteristics label.
To connect the power line do the following :
• First open the electric board of the unit, using the special tool supplied with the
unit.
• Make sure that the main switch of the unit is in the off position.
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• Pass the cable through one of the two plastic cable ports that are installed on the
machine.
• Connect the cable to the main switch terminals and make sure that the
connections are properly tightened. The connections for the cables are clearly
indicated on the unit’ s electrical board.
Important All electrical connections must be made according to the unit’s wiring diagram and
the applicable local regulations. Cable cross-sections indicated on the technical
characteristics table are only indicative. Local regulations should always be
consulted.
Important To ground the unit, use the appropriate terminal on the electrical panel.
Important Line voltage should be within +/- 10% of the voltage indicated. Tolerance of the
voltage between phases should be less than 3%.
5.4.2 Control cable connection The following options are available for remote control as standard:
• Installation of remote on-off switch.
• Installation of remote summer-winter switch ( for heat pump units).
• Installation of remote alarm.
A full remote control panel can be supplied as an option ,upon request. (see section
on automatic control).
To install the control cables, pass the cables inside the unit using the second plastic
gasket, as described above.
Carry out the connections as indicated on the wiring diagram.
Important Connections for remote on-off and summer-winter are voltage free. Never connect
any voltage to those terminals.
Important For connection of the remote error display(LED or Relay) connect 5 A 125VAC/230
VAC
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Important The units are factory programmed for summer-winter switching on the unit keyboard.
If external switching is required, parameter H27 has to be manually changed as
described in the section covering automatic control.
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Typical wiring diagrams
W1 VU W
SF
CSF
CH
CC1 R
VCS T
PE
380
-415V
/3F
/50Ç
zL1
L3
N
L2
FC
SM1
FSF
FCH
ALARM
E01:HIGH PRESSURE CIRCUIT 1E02:LOW PRESSURE CIRCUIT 1E03:THERMAL SWITCH PROTECTION COMP.1E04:COND. FANS 1,2 THERMAL PROTECTION
E41:SUPPLY FAN THERMAL PROTECTION
E07:PROBE ST3 FAULTE40:PROBE ST1 FAULT
E00:REMOTE OFF
MDP 22-42
1
SM1 GENERAL CIRCUIT BREAKERFC1 COMPRESSOR CIRCUIT BREAKERFSF SUPPLY FAN CIRCUIT BREAKERCC1 COMPRESSOR CONTACTORCSF SUPPLY FAN CONTACTORFCH CRANKCASE HEATER COMP. CIRCUIT BREAKERVC VOLTAGE SURVEYOR
PTOT HCM1
V1U1
CC
POWER CIRCUIT
AL
AR
M (
N.C
. C
ON
TA
CT
)
SE
NS
OR
ST
1
SE
NS
OR
ST
3
FA
N 1
TH
ER
MA
L P
RO
TE
CT
ION
CO
MP
. 1
TH
ER
MA
L P
RO
TE
CT
ION
HIG
H P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
1
LO
W P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
1
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.
SS
13
HT
L1
L2
L3
NON-OFF REMOTE ON-OFF AL-AL ALARM SIGNAL(N.O. CONTACT)
MDP 22-42 R
LP
1
HP
1
2
F1 CONTROL CIRCUIT BREAKERF2 LOW VOLTAGE(12 V AC)CIRCUIT BREAKERSF FAN SPEED CONTROLVC VOLTAGE SURVEYORCC COMPRESSOR CONTACTORCSF SUPPLY FAN CONTACTORSV LIQUID LINE SOLENOID VALVEFM CONDENSER UNIT FANTH SUPPLY FAN THERMAL PROTECTION (PTO)TC COMPRESSOR THERMAL PROTECTIONTF COND.FAN THERMAL PROTECTIONHP HIGH PRESSURE PRESSOSTAT CIRCUIT LP1 LOW PRESSURE PRESSOSTAT CIRCUIT S1 SUPPLY FAN TEMPERATURE SENSORS3 COIL TEMPERATURE SENSORTR1 TRANSFORMER 220/12V AC
FROM POWER CIRCUIT
SV CH
SV
SO
LE
NO
ID L
IQU
IT V
ALV
E
Ltc
Off
ON
RE
MO
TE
ON
-OF
F
EMI FILTER
FF
FM
C
3433
SF CONTROL
LF
F1 24
N
F1
T
TH
TC
1
F1
N
CONTROL CIRCUIT
CSF
SU
PP
LY
FA
N T
HE
RM
AL
PR
OT
EC
TIO
N
SV
CC
TF
1
S3
SV
N
TR1 12V220V
ST1
ID1ID2
ST2
ID3
ST3
ID4
ST4
ID5
GND
TK1
GND
12DC
ALL
12AC
12AC
H
P1P1
L
C1
T
S1
H
NC
ID9NC
NC
12
AN2 GND
TK2
GND
ID10
ST6
ID7
T
ID11
ID8 ID6
ST5
CC
1 2 3 4 5 6 7 8 9 10
VC
AL
ENERGY 400
AL
F2
- S +
ON OFF SAL AL 1 S 3 T F1 C1T LH P1 P1 Ltc
RE
MO
TE
ON
-OF
F
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H1 H2 H3
K1
FH1
H4 H6H5
K2
FH2
H8H7 H9
K3
FH3
CM1
V1U1
CC1
W2U2 V2W1
CM2
CC2
CC2
VU W
SF
CSF
CH1 CH2
CC1
R
VCS T
PE
38
0-4
15
V/3
F/5
0Ç
z
L1
L3
N
L2
FC1 FC2
SM1
FSFFCH1
ALARM
E01:HIGH PRESSURE CIRCUIT 1E02:LOW PRESSURE CIRCUIT 1
E03:THERMAL SWITCH PROTECTION COMP.1
E04:COND. FANS 1,2 THERMAL PROTECTION
E23:THERMAL SWITCH PROTECTION COMP.2
E21:HIGH PRESSURE CIRCUIT 2
E22:LOW PRESSURE CIRCUIT 2
E41:SUPPLY FAN THERMAL PROTECTION OR HEATERS SAFETY THERMOSTAT
E07:PROBE ST3 FAULT
E27:PROBE ST6 FAULT
E40:PROBE ST1 FAULT
E00:REMOTE OFF
MDP 48 -100 -3 STEP HEATERS
1
FCH2
POWER CIRCUIT
SM1 GENERAL CIRCUIT BREAKERFC1 COMPRESSOR 1 CIRCUIT BREAKERFC2 COMPRESSOR 2 CIRCUIT BREAKERFSF SUPPLY FAN CIRCUIT BREAKERFH1-3 HEATERS CIRCUIT BREAKERSCC1 COMPRESSOR 1 CONTACTORCC2 COMPRESSOR 2 CONTACTORK1-3 HEATERS CONTACTORSCSF SUPPLY FAN CONTACTORFCH1 CRANKCASE HEATER COMP.1 CIRCUIT BREAKERFCH2 CRANKCASE HEATER COMP.2 CIRCUIT BREAKERVC VOLTAGE SURVEYOR
PTOT H
CH1 CH2
N N
STEP 3
TR112V220V
ST1
ID1ID2
ST2
ID3
ST3
ID4
ST4
ID5
GND
TK1
GND
12DC
ALL
12AC
12AC
H
P1P1
L
P2
H
P2
L
C1
T
S1
H
NC
ID9NC
NC
12
AN2 GND
TK2
GND
ID10
C2
ST6
ID7
T
ID11
ID8
T
ID6
ST5
S4
1 2 3 4 5 6 7 8 9 10
VC
AL
ENERGY 400
AL
F2
- S +
S W SAL AL 1 SS 3 4 T F1 C1F2T TL TH C2P1 P1 H P2 P2L Ltc2Ltc1
RE
MO
TE
SU
MM
ER
-WIN
TE
R
AL
AR
M (
N.C
. C
ON
TA
CT
)
SE
NS
OR
ST
1
SE
NS
OR
ST
4
SE
NS
OR
ST
3
FA
N 1
TH
ER
MA
L P
RO
TE
CT
ION
FA
N 2
TH
ER
MA
L P
RO
TE
CT
ION
CO
MP
. 1
TH
ER
MA
L P
RO
TE
CT
ION
CO
MP
. 2
TH
ER
MA
L P
RO
TE
CT
ION
HIG
H P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
1
LO
W P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
1
HIG
H P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
2
LO
W P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
2
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
2
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
1
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.1
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.2
S
4
SS
13
HT
L1
L2
L3
N ON-OFF REMOTE ON-OFFS-W REMOTE SUMMER-WINTERAL-AL ALARM SIGNAL(N.O. CONTACT)
TC
2LP
2
LP
1
HP
2
HP
1
2
F1 CONTROL CIRCUIT BREAKERF2 LOW VOLTAGE(12 V AC)CIRCUIT BREAKERSF1,2 FANS 1,2, SPEED CONTROLSF3,4 FANS 3,4, SPEED CONTROLVC VOLTAGE SURVEYORCC1 COMPRESSOR 1 CONTACTORCC2 COMPRESSOR 2 CONTACTORCSF SUPPLY FAN CONTACTOR4V1 CIRCUIT 1 4-WAY REVERSING VALVE4V2 CIRCUIT 2 4-WAY REVERSING VALVESV1 CIRCUIT 1 LIQUID LINE SOLENOID VALVESV2 CIRCUIT 2 LIQUID LINE SOLENOID VALVEFM1,2 CONDENSER UNIT FAN 1,2FM3,4 CONDENSER UNIT FAN 3,4TH SUPPLY FAN THERMAL PROTECTION (PTO)TSAF HEATERS SAFETY THERMOSTATTC1 COMPRESSOR 1 THERMAL PROTECTIONTC2 COMPRESSOR 2 THERMAL PROTECTIONTF1,2 COND.FANS 1,2 THERMAL PROTECTIONHP1 HIGH PRESSURE PRESSOSTAT CIRCUIT 1LP1 LOW PRESSURE PRESSOSTAT CIRCUIT 1HP2 HIGH PRESSURE PRESSOSTAT CIRCUIT 2LP2 LOW PRESSURE PRESSOSTAT CIRCUIT 2S1 SUPPLY FAN TEMPERATURE SENSORS3 CIRCUIT 1 COIL TEMPERATURE SENSORS4 CIRCUIT 2 COIL TEMPERATURE SENSORTR1 TRANSFORMER 220/12V AC
FROM POWER CIRCUIT
SV1 CH1
SV1 SV2
CIR
CU
IT 1
LIQ
UID
SO
LEN
OID
VA
LVE
Ltc1,2
Off
ON
RE
MO
TE
ON
-OF
F
EMI FILTER
FF1
FM2
C2
3433
SF1 CONTROL
LF1
F1 24
N
F4
T
TF
1
TC
1
F1
SV2 CH2 N
CONTROL CIRCUIT
CSF
SU
PP
LY
FA
N T
HE
RM
AL
PR
OT
EC
TIO
N
TF
4
SV1
CC1
SV2
CC
1
CC
2
CC2
C1
FM1
W
S
SU
MM
ER
-WIN
TE
RR
EM
OT
E
OFFON
RE
MO
TE
ON
-OF
F
C3
FM3
C4
FM4
F1
LF2
24
N
SF1 CONTROL
33 34
EMI FILTER
FF2
TF
2T
F3
T F3 T F4
FA
N 3
TH
ER
MA
L P
RO
TE
CT
ION
FA
N 4
TH
ER
MA
L P
RO
TE
CT
ION
SV1 SV2
4V
1
4V
2
N N
S3
4V1 4V2
CIR
CU
IT 1
RE
VE
RS
ING
VA
LVE
CIR
CU
IT 2
RE
VE
RS
ING
VA
LVE
CIR
CU
IT 2
LIQ
UID
SO
LEN
OID
VA
LVE
TH
NN
4V1 4V2
Interklima S.A
21
CM3
V3U3
CC3
W4U4 V4W3
CM4
CC4
CC2
VU W
SF
CSF
CH1 CH2
CC1
R
VCS T
PE
L1
L3
N
L2
FC3 FC4
SM1
FSFFCH1
ALARM
E01:HIGH PRESSURE CIRCUIT 1E02:LOW PRESSURE CIRCUIT 1
E03:THERMAL SWITCH PROTECTION COMP.1
E04:COND. FANS 1,2 THERMAL PROTECTION
E23:THERMAL SWITCH PROTECTION COMP.2
E21:HIGH PRESSURE CIRCUIT 2
E22:LOW PRESSURE CIRCUIT 2
E41:SUPPLY FAN THERMAL PROTECTION OR HEATERS SAFETY THERMOSTAT
E07:PROBE ST3 FAULT
E27:PROBE ST6 FAULT
E40:PROBE ST1 FAULT
E00:REMOTE OFF
MDP 115-165 H -3 STEP HEATERS
FCH2
POWER CIRCUIT
SM1 GENERAL CIRCUIT BREAKERFC1 COMPRESSOR 1 CIRCUIT BREAKERFC2 COMPRESSOR 2 CIRCUIT BREAKERFC3 COMPRESSOR 3 CIRCUIT BREAKERFC4 COMPRESSOR 4 CIRCUIT BREAKERFSF SUPPLY FAN CIRCUIT BREAKERFH1-3 HEATERS CIRCUIT BREAKERSCC1 COMPRESSOR 1 CONTACTORCC2 COMPRESSOR 2 CONTACTORCC3 COMPRESSOR 3 CONTACTORCC4 COMPRESSOR 4 CONTACTORK1-3 HEATERS CONTACTORSCSF SUPPLY FAN CONTACTORFCH1-4 CRANKCASE HEATERS COMP.1-4 CIRCUIT BREAKERSVC VOLTAGE SURVEYOR
PTOT H
CH1 CH2
N N
STEP 3
H1 H2 H3
K1
FH1
H4 H6H5
K2
FH2
H8H7 H9
K3
FH3
CH3
N
CH3
CC3
FCH3
CH4
N
CH4
CC4
FCH4
CM1
U1 V1 W1
CM2
W2U2 V2
FC1
CC1 CC2
FC2
STEP 1 STEP 2 STEP 3
TR1 12V220V
ST1
ID1ID2
ST2
ID3
ST3
ID4
ST4
ID5
GND
TK1
GND
12DC
ALL
12AC
12AC
H
P1P1
L
P2
H
P2
L
C1
T
S1
H
NC
ID9NC
NC
12
AN2 GND
TK2
GND
ID10
C2
ST6
ID7
T
ID11
ID8
T
ID6
ST5
S4
1 2 3 4 5 6 7 8 9 10
Z Y
ON-OFF: REMOTE ON-OFFS-W : REMOTE SUMMER-WINTERAL-AL : ALARM SIGNAL(N.O. CONTACT)Ζ-Υ : THERMOSTAT FOR HEATERS OPERATION
FA
N 1
TH
ER
MA
L P
RO
TE
CT
ION
FA
N 2
TH
ER
MA
L P
RO
TE
CT
ION
CO
MP
. 1
TH
ER
MA
L P
RO
TE
CT
ION
CO
MP
. 2
TH
ER
MA
L P
RO
TE
CT
ION
HIG
H P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
1
LO
W P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
1
HIG
H P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
2
LO
W P
RE
SS
UR
E P
RE
SS
OS
TA
T C
IRC
UIT
2
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
2
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
1
S
4
SS
13
WS
L1
L2
L3
N
MDP 115 H-3 STEP HEATERS
TC
2LP
2
LP
1
HP
2
HP
1
F1 CONTROL CIRCUIT BREAKERF2 LOW VOLTAGE(12 V AC)CIRCUIT BREAKERSF1,2 FANS 1,2,3,4 SPEED CONTROLVC VOLTAGE SURVEYORCC1 COMPRESSOR 1 CONTACTORCC2 COMPRESSOR 2 CONTACTORCC3 COMPRESSOR 3 CONTACTORCC4 COMPRESSOR 4 CONTACTORK1 HEATERS STEP 1 CONTACTORK2 HEATERS STEP 2 CONTACTORK3 HEATERS STEP 3 CONTACTORCSF SUPPLY FAN COMMAND CONTACTORSV1 CIRCUIT 1 LIQUID LINE SOLENOID VALVESV2 CIRCUIT 2 LIQUID LINE SOLENOID VALVE4V1 CIRCUIT 1 4-WAY VALVE4V2 CIRCUIT 2 4-WAY VALVEFM1,2 CONDENSER UNIT FANS 1,2FM3.4 CONDENSER UNIT FANS 3.4TC1 COMPRESSOR 1 THERMAL PROTECTIONTC2 COMPRESSOR 2 THERMAL PROTECTIONTC3 COMPRESSOR 3 THERMAL PROTECTIONTC4 COMPRESSOR 4 THERMAL PROTECTIONTF1,2,3,4 COND.FANS 1-4 THERMAL PROTECTIONHP1 HIGH PRESSURE PRESSOSTAT CIRCUIT 1LP1 LOW PRESSURE PRESSOSTAT CIRCUIT 1HP2 HIGH PRESSURE PRESSOSTAT CIRCUIT 2LP2 LOW PRESSURE PRESSOSTAT CIRCUIT 2S1 SUPPLY FAN TEMPERATURE SENSORS3 CIRCUIT 1 COIL TEMPERATURE SENSORS4 CIRCUIT 2 COIL TEMPERATURE SENSORTR1 TRANSFORMER 220/12V AC
4V1CH1
4V1 4V2
CIR
CU
IT 1
RE
VE
RS
ING
VA
LV
E
CIR
CU
IT 2
RE
VE
RS
ING
VA
LV
E
Ltc1,2,3,4
Off
ON
RE
MO
TE
ON
-OF
F
EMI FILTER
CC3 CC4
LF2
F1 24
SF2 CONTROL
33 34
N2
EMI FILTER
FF2
C1
FM1
C3
FM3
C4
FM4
T
TC
3
C3
TC
4
T
C4
S
W
S3
NN
sv1 sv2
C3T T C4
CO
MP
. 4
TH
ER
MA
L P
RO
TE
CT
ION
CO
MP
. 3
TH
ER
MA
L P
RO
TE
CT
ION
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.1
Ltc1 Ltc3
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.3
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.2
Ltc2
22
0 V
FO
R E
LE
CR
ON
IC T
HE
RM
AL
PR
OT
EC
TIO
N C
OM
P.4
Ltc4
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
2
CR
AN
CA
SE
HE
AT
ER
CO
MP
RE
SS
OR
3
CH2CH3
WSALALOFFON
CC
2
4V1 4V2
D
Y
Z
T
Saf
T
TH
T/S
AF
T H T SAFZ Y
TH
ER
MO
ST
AT
FO
R H
EA
TE
RS
OP
ER
AT
ION
RE
MO
TE
SU
MM
ER
-WIN
TE
R
SU
PP
LY
FA
N T
HE
RM
AL
PR
OT
EC
TIO
N
HE
AT
ER
S S
AF
ET
Y T
HE
RM
OS
TA
T
TSV2SV1
SV1 SV2
CIR
CU
IT 1
LIQ
UIT
SO
LE
NO
ID
CIR
CU
IT 2
LIQ
UIT
SO
LE
NO
ID
VC
AL
ENERGY 400
AL
F2
- S +
ON OFF SAL AL 1 SS 3 4 T F1 C1F2T TL TH C2P1 P1 H P2 P2L
RE
MO
TE
ON
-OF
F
AL
AR
M (
N.C
. C
ON
TA
CT
)
SE
NS
OR
ST
1
SE
NS
OR
ST
4
SE
NS
OR
ST
3
FF1
FM2
C2
3433
SF1 CONTROL
LF1
F1 24
N1
F4
T
TF
1
TC
1
F1
T F3 T F4
FA
N 4
TH
ER
MA
L P
RO
TE
CT
ION
FA
N 3
TH
ER
MA
L P
RO
TE
CT
ION
4V2CH2 N
CONTROL CIRCUIT
CSF
TF
2T
F3
TF
4
SV1
CC2
SV2
DDDD
CC
1
CC
3
CC
4
K1
K2
K3
CC1
Interklima S.A
22
6. Automatic control. 6.1 Control description All units are equipped with electronic programmable microprocessor control. This control
ensures complete management of all the functions of the unit and also ensures protection of
all the unit ‘s basic components as well as full diagnostics so that all possible malfunctions
become immediately obvious to the user. The most important features are listed below.
• Fully automatic functioning of the unit by means of compressor control via a special
algorithm, using air return temperature as the controlled variable.
• Full featured protection by controlling high and low pressure, heat exchanger
protection against freeze up and water flow detection.
• Sophisticated defrost control using time and temperature.
• Linear fan speed regulation according to coil temperature or pressure, including fan
silent mode operation.
• Possibility for remote on-off
• Possibility for remote summer-winter
• Possibility for remote display alarm
All above options are provided as standard. There are further features of the electronic control
that can be supplied upon request. Below is a list of these options.
• Full featured remote keyboard, that can be easily connected to the unit by means
of a special connector (supplied with the keyboard) and a 3 wire cable having a
minimum wire cross-section of 0,5 mm. The maximum Cable length is 100m.
See user interface section for connection details.
• Connection to building management systems via modbus. As this involves a
slightly different type of control it should be made known to the factory together
with the order.
Dynamic mode set point. It is possible to program the unit so as to enable the dynamic set
point feature. This can be programmed to operate either via a 4-20 mA proportional signal
according to user setting or by means of an outdoor sensor. The special algorithm built into
the control adjusts the unit set point according to the external request.
The unit control has more than 150 programmable parameters. All units are factory
programmed and ready for operation. In case of accidental erasure of the unit ‘s program for
any reason, it can be easily reprogrammed by means of a special copy card that is connected
to the control board. All parameters are instantly uploaded to the control from the copy card. Caution This operation must be carried out only by technical service authorized by the manufacturer.
Interklima S.A
23
<IMG INFO>
6.2 User interface
The interface on the front panel of the instrument can be used to carry out
all the operations necessary for the use of the instrument, and in particular
to:
• Set operating mode
• Respond to alarm situations
• Check the state of resources
Front panel of the instrument
The instrument can function without the aid of a keyboard
Keys
Selects operating mode:
If the heating mode is enabled, each time the key is pressed the following
sequence occurs:
Stand-by -! cooling ! heating ! stand-by
if heating mode is not enabled:
Stand-by ! cooling ! stand-by
In menu mode, this key acts as a SCROLL UP or UP key (increasing
value).
Resets alarm, and turns the instrument on and off.
Press once to reset all manually reset alarms not currently active; all the alarm
events per hour will also be reset even if the alarms are not active.
Keyboard
Mode
On-off –
Alarms reset
Interklima S.A
24
IMG INFO
Hold down the key for 2 seconds to turn the instrument from on to off or vice
versa. When it is off, only the decimal point remains on the display. In menu
mode this key acts as a SCROLL DOWN or DOWN key (decreasing value).
Pressing the “mode” and “on-off” keys at the same time:
If you press both keys at the same time and then release within 2 seconds, you
will move one level deeper in the display menu.
If you press both keys for more than 2 seconds you will move one level up.
If you are currently viewing the lowest level in the menu and you press both
keys and release within 2 seconds, you will go up one level.
Display
The device can communicate information of all kinds on its status,
configuration, and alarms through a display and a number of leds on its front
panel.
Display
Normal display shows:
• regulation temperature in tenths of degrees celsius or fahrenheit
• the alarm code, if at least one alarm is active. If multiple alarms are
active, the one with greater priority will be displayed, according to the Table of
Alarms.
• If temperature control is not analogue and depends on the status of a digital
input (ST1 or ST2 configured as digital inputs), the “On” or “Off” label
will be displayed, depending on whenther temperature control is active
or not.
• When in menu mode, the display depends on the current position;
labels and codes are used to help the user identify the current
function.
Led
Led 1 compressor 1.
• ON if compressor 1 is active
• OFF if compressor 1 is not active
• Rapid BLINK if safety timing is in progress
• Slow BLINK if compressor is currently set to defrost
Power step 2 led
mode – onoff
keys
Combination
Interklima S.A
25
<IMG INFO>
• ON if power step 2 is active
• OFF if power step 2 is not active
• Rapid BLINK if safety timing is in progress
• Slow BLINK if step 2 is currently defrosting
Power step 3 led
• ON if power step 3 is active
• OFF if power step 3 is not active
• Rapid BLINK if safety timing is in progress
• Slow BLINK if step 3 is defrosting
Power step 4 led
• ON if power step 4 is active
• OFF if power step 4 is not active
• Rapid BLINK if safety timing is in progress
• Slow BLINK if step 4 is defrosting
Electrical heater/boiler led
• ON if at least one internal anti-freeze electrical heater or boiler is
enabled
• OFF if both are off
Heating Led
• ON if the device is in heating mode.
Cooling Led
• ON if the controller is in cooling mode
If neither the HEATING led nor the COOLING led are on, the controller is in
STAND-BY mode.
When it is off, only the decimal point appears on the display.
Wall-mounted keyboard
The remote keyboard on the display is an exact copy of the information
displayed on the instrument, with the same leds;
Interklima S.A
26
Remote keyboard
Α. 0: Standby 1: On
Economy mode
Night Purging
Β.
Fan Cool
Heat Auto D. THERMOSTAT
The knob is used to set a deviation from the set point(according to the heat/ cool mode in use); the deviation is algebraically added to the active set point ; the maximum value (from halfway point to each of the limit switches) is factory-set (+/- 5˚C).
Remote keyboard
<IMG INFO> 282,8 148,35 0
Interklima S.A
27
Ε. Status LED:
This LED indicates the operation mode • GREEN: cooling mode • RED: heating mode • NOT LIT: standby
This LED indicates the state of the evaporation fan: • NOT LIT: fan OFF • GREEN: fan operating correctly • GREEN BLINKING: dirty filters • RED BLINKING: clogged filters • RED: alarm condition- one or more of the alarms
specified in the diagnostic chapter are present
The connection is illustrated below:
PCB CONTROL BOARD BACK VIEW OF REMOTE CONTROL
S + -
S + -
24
25 26
Interklima S.A
28
7. Operation instructions 7.1 Before start up
Before start-up of the unit ensure that everyone involved has fully understood the
safety instructions which are contained in this manual
Before undertaking whatever type of electrical connection make sure that the local
electrical network characteristics (voltage, phases, frequency) are the same with that
written on the technical characteristics table.
Connect the cable to the connection points on the central cut-off switch and ensure
that they are tight. The phase connections and the neutral are clearly marked on the
unit’s electrical board and on the electrical diagram which is located on the inside of
the electrical board access door
Connect the Remote Control wires in accordance with the unit’s electrical diagram
Set the central cut-off switch (SM1) in the “ON” position
Check that the warning light VC is lit, if not change the phase connection.
Set the switch FH1-FCH2-FCH3-FCH4 in the “ON” position for 24 hours in order to
pre-heat the oil in the compressors. Immediately after this period you are ready to
start the unit.
7.2 Starting and operating the unit
Put all the switches on the electrical board in the :ON: position
Immediately you will see that a red light lights up on the Control
To start the unit press and hold down the key for 2 seconds to turn the unit from
“OFF” to “ON” and vice versa. When the unit is “OFF” the control displays a red dot
or E00 if there is a remote on-off contact and it is in the “OFF” position. When the unit
is “ON” the display shows the return water temperature.
If you have a heat pump model you can select cooling or heating mode by means of
the key . Pressing this key you will cycle through stand by – cooling – heating –
Interklima S.A
29
stand by modes. When the unit is set for cooling operation the LED below the symbol
is lit on the screen, and when in heating mode the LED below symbol is lit.
7.3 To change set points To change set points press hold down both keys. When the screen displays “Set”,
repeat to enter the next level. By scrolling up and down the levels “Coo” and “Hea”
appear in sequence. To change the cooling set point, when the display is “Coo”,
press again momentarily and simultaneously both keys to enter the next level. The
factory setting (16ºC) appears on the screen. To change scroll up or down.
When you have the desired value on screen press and hold down both keys for 2
seconds to accept and return to the previous level. Scroll until the label “Hea”
appears on screen and repeat the above procedure to change the heating set point.
When finished return to the first level by pressing and holding down both keys for 2
seconds.
To display other useful temperatures of the system, go to level 1 as described and
scroll down until the label “tp” is displayed on the screen. Repeat the procedure to
step one level down. Scrolling down you will see the labels t02,t03,t06. When the
screen display t02 go to the next level to see the value of return air temperature.
Repeat the same procedure for t03 and t06 to see the coil temperature.
Interklima S.A
30
8. Maintenance 8.1 General Any maintenance or service operation on the units should be carried out by
authorized and competent technical personnel.
In case of repeated energisation of one or more safety devices and alarms it is
necessary to analyze the problem in depth, find the cause for it and eliminate it.
8.2 Refrigeration circuit The simple and robust construction of the refrigerant circuit prevents the majority of
possible problems, as this is the most delicate part of the unit. It is, therefore, not
necessary to execute any preventive maintenance action on the unit, as long as it is
properly operating, without any indications of malfunctions.
We, nevertheless, suggest some preventive maintenance actions, so as to ensure
that the unit continues to perform at all times at a high level.
These actions are of a routine character:
• Check the various operating and safety set points of the unit to verify that they
have the correct values.
• Check all electric and control voltage to verify that they have the correct values.
• Check the water flow, and the water filter.
• Check all the temperatures of the system and verify that they are within normal
limits.
8.3 Condenser and evaporator coils The coils do not require special maintenance. Regular cleaning only of the fins with
low pressure water spray and an appropriate cleaning agent is necessary. A regular
check of the drainage channel for possible clogging should also be undertaken.
8.4 Fans
8.4.1 Condenser fans The condenser fans areaxial The bearings are permanently sealed and
therefore do not require maintenance
Interklima S.A
31
8.4.2 Evaporator fans The evaporator fans are twin centrifugal type. Their bearings are sealed and
do not require maintenance. The belts which join the motor to the fan require regular
checking as to their wear and their tensioning. For their tensioning the motor is
positioned on a special base so that by releasing the nut(as shown in the
photograph) they can be correctly tensioned
In order to calculate the length of the belt of a unit you can use the formula
below:-
L= 2E+1,57(D1+D2)
where: L = the length of the belt in mm
E = the distance between the motor and fan shafts
D1 = the diameter of the fan pulley
D2 = the diameter of the motor pulley
Interklima S.A
32
9. Trouble shooting 9.1 Problems and corrective action in heating mode
No. Problem Probable cause Symptoms Corrective action
A Temperature of air outlet
lower than expected
A1.
Load very high
A1.1
Temperature of air outlet
lower than expected
Return the load to within
allowed operating limits
A2
Very low outside
temperature
See A1.1 Await return of outside
temperature to within operating
limits
A3.
Dirty coil fins
See A1.1 Clean coil
A4.
Coil fins obstructed
See A1.1 Move away obstruction
A5
The fans turn in the wrong
direction(only for 3 phase
fans)
See A1.1 Change the supply cable phase
connections
A6.
Lack of cooling fluid
See A1.1
Low evaporation pressure.
Many bubbles in the fluid
indicator
Check for leaks and refill with
cooling fluid to the correct level
B Cut off due to High
pressure pressostat
alarm (manual reset)
B1
Water temperature setting
is high
B1.1
The compressor stops and
display shows alarm code
E01- compressor 1
E21 – compressor 2
Reset to correct value
B2
Blocked heat exchanger,
low water supply
B2.1
High difference between
water inlet and exit
temperatures
See C1.1
Clean heat exchanger and
water filter and check water
pump
C The unit does not
operate and displays
error code E07
C1
Sensor ST3(coil circuit1)
short-circuited or cut cable
C1.1
The compressor stops and
error display E07
Check sensor and connection.
Possible replacement
D The unit does not
operate and displays
error code E41
D1 Overheating of the outlet
fan or of the heating element
D1.1 the compressor on the
refrigeration circuit stops. On the screen appears the message ALARM CODE :
E41
check the fan and the heating element
E The unit does not
operate and displays
error code E03
E1
Thermal protection switch
for compressor 1
E1.1
The compressor stops and
error display E03
Check load and cooling fluid
level
F The unit does not
operate and displays
error code E13
F1
Thermal protection switch
for compressor 2
F1.1
The compressor stops and
error display E13
Check load and cooling fluid
level
G The unit does not
operate and displays
error code E04
G1
Fan1 thermal protection
switch
G1.1
Fan thermal alarm E04
Check fan
H The unit does not
t d di l
H1 H1.1 Check fan
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operate and displays
error code E24
Fan2 thermal protection
switch
Fan thermal alarm E24
I The unit does not work
and displays error code
E00
I1
Remote “ON_OFF” in OFF
position
I1.1
Unit stops operating and
displays error message
E00
Switch off the remote “on-OFF”
J The unit does not
operate and there is no
error display even if the
main power switch is in
the “ON” position
J01
The fuse is in the “OFF”
position
J1
No display on the screen
Check the control circuit . Put
the fuse in the “ON” position
J2
The 3 faces line voltage
monitors has cut down the
circuit
J2.1
No display shows
Check the electric supply is at
the correct machine operating
level and the phase installation
9.2 Problems and corrective action in cooling mode No Problem Probable cause Symptoms Corrective action A Temperature of
AIRoutlet higher than
expected
A2
Very high load
A2.1
Temperature of AIR outlet
higher than expected
Return the load within allowed
operating limits
A3
Very high outside
temperature
See A2.1 Await return of outside
temperature within operating
limits
A4.
Dirty coil fins
See A2.1 Clean coil
A5.
Coil fins obstructed
See A2.1 Move away obstruction
A6
The fans turn in the wrong
direction(only 3 phase
fans)
See A2.1 Change the supply cable phase
connections
A7.
Lack of cooling fluid
See A2.1
Low evaporation pressure.
Many bubbles in the fluid
indicator
Check for leaks and refill with
cooling fluid to the correct level
B Cut off due to High
pressure pressostat
alarm (manual reset)
B1
One or more fans does not
operate
B1.1
The compressor stops and
display shows alarm code
E01- compressor 1
E21 – compressor 2
Check the thermal of the fan.
Bushel or change the fan
B2 See B1.1 Decrease the outside
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Very high outside
temperature
temperature and manually reset
the unit
B3
Recycle hot air to the coil
B3.1
Air temperature to the coil
higher than the appropriate
Change the position of the unit,
move away any obstruction and
manually reset the unit
B4
See A4
See B1.1 Clean coil and manually reset
the unit
B5
See a5
See B1.1 Move away any obstruction and
manually reset operate the unit
B6
Very high load
B6.1
Outlet water temperature
Return the load within allowed
operating limits and manually
reset the unit
C Cut-off by low pressure
pressostat
C1.
Lack of cooling fluid
C1.1
The compressor stops and
display shows alarm code
E02 compressor 1
E22– compressor 2
Check for leaks and refill with
cooling fluid to the correct level
C2
Low water supply
See C1.1 Check the water flow from the
diagram, clean water filter and
check the hydraulic circuit.
C3
Dirty exchanger’s coil
See C1.1 Clean the coil
C4
Blocked refrigerant filter
See C1.1 Change the filter of refrigerant
circuits
C5
Low condensing pressure
See C1.1 Check the fans
D
The unit does not
operate and displays
error code E07
D1
Sensor ST3(coil circuit1)
short-circuited or cut cable
D1.1
The compressor stops and
error display E07
Check sensor and connection.
Possible replacement
E The unit does not
operate and displays
error code E40
E1 Sensor ST1(otlet fan)
short-circuited or contact broken
E1.1 the compressor on the
refrigeration circuit stops. On the screen appears the message ALARM CODE :
E41
check the connection and the sensor for possible replacement
F The unit does not
operate and displays
error code E41
F1 Overheating of the outlet
fan or of the heating element
F1.1 the compressor on the
refrigeration circuit stops. On the screen appears the message ALARM CODE :
E41
check the fan and heating element
G The unit does not
operate and displays
error code E03
G1
Thermal protection switch
for compressor 1
G1.1
The compressor stops and
error display E03
Check load and cooling fluid
level
H The unit does not
operate and displays
error code E13
H 1
Thermal protection switch
for compressor 2
H1.1
The compressor stops and
error display E13
Check load and cooling fluid
level
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I The unit does not
operate and displays
error code E04
I1
Fan1 thermal protection
switch
I1.1
Fan thermal alarm E04
Check fan
J The unit does not
operate and displays
error code E24
J1
Fan2 thermal protection
switch
J1
Fan thermal alarm E24
Check fan
K The unit does not
operate and displays
error code E00
Remote “ON_OFF” in OFF
position
Unit stops operating and
displays error message
E00
Remote “ON_OFF” in “ON”
position
L The unit does not
operate and there is no
error display even if the
main power switch is in
the “ON” position
The circuit breaker is in the
“OFF” position
No display on the screen Check the control circuit . Put
the circuit breaker in the “ON”
position
9.3 Table of alarms
CODE
MESSAGE
E00 Remote on-off E01 High pressure circuit 1 E02 Low pressure circuit 1 E03 Thermal switch protection compressor 1 E04 Thermal switch protection condenser fan circuit 1 E05 Anti-freeze circuit 1 E07 Probe ST3 fault E13 Thermal switch protection compressor 2 E21 High pressure circuit 2 E22 Low pressure circuit 2 E23 Thermal switch protection condenser fan circuit2 E24 Thermal switch protection condenser fan circuit 2 E25 Anti-freeze circuit 2 E31 High pressure circuit 2 on analog input E32 Low pressure circuit 2 on analog input E40 Probe ST1 fault E41 Thermal switch protection supply fan or resistance
safety thermostat
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Appendix 1 Menu Levels
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Control probe Current alarm
Set point:
Analogue Inp.:
Alarms:
Digital input:
Op. hours:
Password:
Parameters:
Label cooling set:
Label heating set:
Input code.: -
Current alarms Code:
Input code: -
Value heating set
Value cooling set
Configuration par.:
Compressor par.:
Fan control par.:
Alarms par.:
Pump par.:
Antifreeze par.:
Defrost par.:
Par. index -
Para
Number of hours
Para
Para
Para
Para
Para
Para
Comp. hours: -
Password value
Status of digital
Val. analogue
Par. index -
Par. index -
Par. index -
Par. index -
Par. index -
Par. index -
Pump hours: Number of hours
Expansion par.: Par. index. .. Para