wall mounted j series pcb & algorithm

WM-JWM-J

Wall Mounted J series Wall Mounted J series

PCB & AlgorithmPCB & Algorithm

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PCB Layout

WM-J (10/15)

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PCB Connection Diagram (WM-J)

CN3CN3

CN

_D

ISP

IR ReceiverIR Receiver

LED Display BoardLED Display Board

++

Outdoor coil sensorOutdoor coil sensor

Indoor coil sensorIndoor coil sensor

Fan motor

AS motor 4WV

OD fan

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1. Features

2. Operating Modes

3. Protections

Content

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1. Features 1. Features 1.1 Mode Selection1.1 Mode Selection

1.2 Power Up Settings1.2 Power Up Settings1.3 Unit ON / OFF1.3 Unit ON / OFF1.4 Temperature Range and Settings1.4 Temperature Range and Settings1.5 Sleep Function1.5 Sleep Function1.6 Indoor Fan control1.6 Indoor Fan control1.7 Louver Control1.7 Louver Control1.81.8 Fan Speed SelectionFan Speed Selection1.9 Turbo Function1.9 Turbo Function1.1.0 Silent Function1.1.0 Silent Function

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Modes can be selected via the value of resistor RMODEModes can be selected via the value of resistor RMODE

MODES AUTO COOL DRY FAN HEAT DEFROST MODES AUTO COOL DRY FAN HEAT DEFROST RMODERMODE

APAP XX X X X X XX X C2.4 versionX C2.4 version7.5k7.5k

ECEC X X XX XX openopen

XX : Modes Available: Modes Available

1. Features1. Features

1.1 Mode Selection1.1 Mode Selection

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1. Features

1.2 Power Up1.2 Power Up SettingsSettings• The system is configured to memorize settings prior to

power down

• System will save updated settings into memory 10 seconds after changes are confirmed

• However, it will take 3 seconds to update memory if unit changes from on to off state

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1. Features

1.3 Unit ON / OFF1.3 Unit ON / OFF3 ways to turn on / off the system:3 ways to turn on / off the system:

(a) On/Off Triggering(a) On/Off Triggering

• Emergency On/Off ButtonEmergency On/Off Button

- System mode setting will rotate in the following - System mode setting will rotate in the following

sequencesequence

AP ….>OFF>AUTO (25°C,AUTO FAN)>OFF>…..AP ….>OFF>AUTO (25°C,AUTO FAN)>OFF>…..

EC ….>OFF>COOL (25°C,AUTO FAN)>OFF>…..EC ….>OFF>COOL (25°C,AUTO FAN)>OFF>…..

• On/Off button on wired (not applicable at the moment) On/Off button on wired (not applicable at the moment) / wireless controller/ wireless controller

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1. Features

1.3 Unit ON / OFF1.3 Unit ON / OFF

(b) Delay timer(b) Delay timer

• Pressing the On/Off will reset the timer to 0 hour (not Pressing the On/Off will reset the timer to 0 hour (not applicable at the moment)applicable at the moment)

(c) Real time On/Off Timer(c) Real time On/Off Timer

• Based on internal real time clockBased on internal real time clock

• The timer settings are kept so that similar switches can The timer settings are kept so that similar switches can occur 24 hours lateroccur 24 hours later

• If emergency ON/OFF switch being press, then the timer If emergency ON/OFF switch being press, then the timer will be deactivatedwill be deactivated

Operation ON/OFF LED and buzzer respond in different way during mode change

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1. Features

1.4 Temperature Range and Settings1.4 Temperature Range and Settings

• operating temperature range is 16°C to 30°Coperating temperature range is 16°C to 30°C

• temperature setting is allowed in COOL, DRY, HEAT and temperature setting is allowed in COOL, DRY, HEAT and AUTO modesAUTO modes

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1. Features

1.5 Sleep Function1.5 Sleep Function• Only available for COOL, HEAT & AUTO mode Only available for COOL, HEAT & AUTO mode

• This function will increase 2°C(cooling mode) or This function will increase 2°C(cooling mode) or decrease 3°C (Heating mode) of the set temperature with decrease 3°C (Heating mode) of the set temperature with timetime

• Change to another modes will inhibit SLEEP function and Change to another modes will inhibit SLEEP function and reset the timerreset the timer

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1. Features

1.5 Sleep Function (Cool Mode) 1.5 Sleep Function (Cool Mode)

Tr

Ts+1/2

Ts+1

Ts+2

1/2 1 2

t (hr)Ts

0

Hours since sleep set

SLEEP set on SLEEP set off

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1. Features

1.5 Sleep Function (Heat Mode) 1.5 Sleep Function (Heat Mode)

Tr

Ts-2

Ts-3

1/2 1 2 t (hr)Ts

1/2 1 20 Hours since sleep set

SLEEP set on SLEEP set off

Ts-1

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• Indoor fan speeds are Indoor fan speeds are SILENT,SILENT, LOW, MED, HIGH, TURBO LOW, MED, HIGH, TURBO or or

AUTO FANAUTO FAN in in COOL COOL andand HEAT HEAT modes modes

• In In FAN modeFAN mode, only , only HI, MEDHI, MED and and LO LO speeds are allowedspeeds are allowed

1. Features

1.6 Indoor Fan Control1.6 Indoor Fan Control

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• Stepper motor will only run when indoor fan runs

• Louver is set at max. closing position when unit is turned off

• If unit switches from OFF mode to ON mode, the louver will

stop at the last position when it goes from ON to OFF mode.

1. Features

1.7 Louver Control1.7 Louver Control

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• In COOL and HEAT, the indoor fan speeds are

SILENT, LO, MED, HIGH, TURBO or AUTO FAN

• In FAN mode, only HI, MED and LO speeds are allowed

1. Features

1.8 Fan Speed Selection1.8 Fan Speed Selection

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• Available in COOL and HEAT modes

• When Turbo function is set, indoor fan will force to Turbo

fan for 20 minutes and working temperature for

- Cooling Cycle is offset Ts – 2˚C

- Heating Cycle is offset Ts + 2˚C

1. Features

1.9 Turbo Function1.9 Turbo Function

• If Turbo & Sleep function are activated at the same time, Sleep

mode timer will reset until Turbo function is clear

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• Available in COOL and HEAT modes only

• When Silent function is set, indoor fan will force to Silent

fan

1. Features

1.1.0 Silent Function1.1.0 Silent Function

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2. Operating Mode 2. Operating Mode

2.1 Cool Mode 2.1 Cool Mode

2.2 Dry Mode2.2 Dry Mode

2.3 Fan Mode2.3 Fan Mode

2.4 Heat Mode2.4 Heat Mode

2.5 Defrost Mode2.5 Defrost Mode

2.6 Auto Mode2.6 Auto Mode

2.7 Off Mode2.7 Off Mode

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• Cold start if: Units restarts 2 hours after it has stopped OR during power-on reset start

• Not available in sleep mode, only available in heat and cool mode• In cooling mode, offset temperature is -2°C• In heating mode, offset temperature is +2• After 20 minutes running or compressor cut-off (whichever earlier),

cold start will be terminated and resume to user setting

2. Operating Modes

Cold Start Cold Start

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• Compressor will cut in if Tr – Ts > 0.5˚C

• Compressor will cut out if Tr < Ts – 1.0˚C

Note: Tr = Room Temperature

Ts = Set Temperature

2. Operating Modes

2.1 Cool Mode 2.1 Cool Mode

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2.2 Dry Mode 2.2 Dry Mode

During the 1During the 1stst 12 minutes of the DRY mode run from: 12 minutes of the DRY mode run from:

i) Cold start ORi) Cold start ORii) Mode change from HEAT, FAN or AUTO HEATii) Mode change from HEAT, FAN or AUTO HEAT

• DRY mode must run under COOL mode with Auto Fan DRY mode must run under COOL mode with Auto Fan Speed for 12 minutesSpeed for 12 minutes OROR

• Run Until TRun Until Trr < T < Tss – 1°C – 1°C

After the 1After the 1stst 12 minutes 12 minutes

• DRY mode will run either Zone A, B, C or D (depend on DRY mode will run either Zone A, B, C or D (depend on temp. condition)temp. condition)

2. Operating Modes2. Operating Modes

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ZONE AZONE A : if T: if Trr - T - Tss > 2 > 2 o o CC

12 Minutes12 Minutes


CompressorCompressor

Low FanLow Fan

ONON

OFFOFF

ONON

OFFOFF

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ZONE BZONE B : : if 0°C < Tif 0°C < Trr - T - Tss < 1°C < 1°C

8 min8 min 4 min4 min

30 sec30 sec 30 sec30 sec

ONON

OFFOFF

ONON

OFFOFF




Low FanLow Fan

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ZONE CZONE C : : if 1°C < Tif 1°C < Tss - T - Trr < 2°C < 2°C

30 sec30 sec 30 sec30 sec12 Minutes12 Minutes

6 min6 min 6 min6 min


ONON

OFFOFF

ONON

OFFOFF


Low FanLow Fan

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ZONE DZONE D : : if if TTss - T - Trr > 3°C > 3°C

Low FanLow Fan


30 sec30 sec


ONON

OFFOFF

ONON

OFFOFF


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• Only Only HI, MED and LOHI, MED and LO speeds are allowed speeds are allowed

• The compressor and the outdoor fan will stopThe compressor and the outdoor fan will stop

• The 4-way valve will turn off alsoThe 4-way valve will turn off also


2.3 Fan Mode 2.3 Fan Mode

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2.4 Heat Mode 2.4 Heat Mode

2. Operating Modes

• Compressor will cut in if Tr < Ts + 1.0˚C

• Compressor will cut out if Tr –Ts > 3.5˚C

Note: Tr = Room Temperature

Ts = Set Temperature

2.4.1 Heat Pump Model2.4.1 Heat Pump Model

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• The indoor fan speed modulate according to the Tin coil:

- If Tin coil > 40˚C, indoor fan run at user set speed

- If Tin coil < 18˚C, indoor fan stop

- If Tin coil crosses 30˚C, indoor fan change to silent fan

speed

Note : TNote : Tin coilin coil = Indoor Coil Temperature = Indoor Coil Temperature

2. Operating Modes


2.4.2 Hot Start2.4.2 Hot Start

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When compressor cuts out, the indoor fan will runs When compressor cuts out, the indoor fan will runs according according

to hot keep optionsto hot keep options

There are only 1 option of Hot Keep:There are only 1 option of Hot Keep:

Fan Off Option Fan Off Option

2. Operating Modes


2.4.3 Hot Keep2.4.3 Hot Keep

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Fan Off OptionFan Off Option

• If TIf Tin coilin coil > 40˚C, indoor fan run at set speed > 40˚C, indoor fan run at set speed

• If TIf Tin coilin coil crosses 37˚C, indoor fan run at silent speed crosses 37˚C, indoor fan run at silent speed

• If TIf Tin coilin coil < 30˚C, indoor fan stop < 30˚C, indoor fan stop



2.4.3 Hot Keep2.4.3 Hot Keep

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• To run heat mode, 4-way valve MUST turn ONTo run heat mode, 4-way valve MUST turn ON

• 4-way valve can only be changed from ON to OFF or vice-4-way valve can only be changed from ON to OFF or vice-versaversa

150 seconds after the compressor has cut out150 seconds after the compressor has cut out

• Then the compressor cut in after 4 secThen the compressor cut in after 4 sec



2.4.4 4-Way valve Changing2.4.4 4-Way valve Changing

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• Defrost mode can only be declared under heat modeDefrost mode can only be declared under heat mode

• Defrost timer start counting when OD coil temperature < Defrost timer start counting when OD coil temperature < +3°C+3°C

• Upon crossing over +5°C or higher more than 150 sec, timerUpon crossing over +5°C or higher more than 150 sec, timer

will resetwill reset

• Temperature sensing can be done only when compressor Temperature sensing can be done only when compressor

run time > 2 minrun time > 2 min


2.5 Defrost Mode 2.5 Defrost Mode

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P12

P14

P16

0

+2+3

0P13

P15P17

To

time

A

B

C

°C

Defrost mode if more than 3 minutes

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i)i) 30 mins to 60 mins below +30 mins to 60 mins below +3°C, if OD coil temperature is <=-3°C, if OD coil temperature is <=-8°C8°C

for > 3 min (compressor ON)for > 3 min (compressor ON)

ii)ii) 60 mins to 120 mins below +60 mins to 120 mins below +3°C, if OD coil temperature is <=-3°C, if OD coil temperature is <=-4°C4°C


iii)iii) >120 mins below +3°C, if OD coil temperature is <=-2°C>120 mins below +3°C, if OD coil temperature is <=-2°C


If unit in OD fan forced off mode, defrost mode is not allowed to If unit in OD fan forced off mode, defrost mode is not allowed to

declaredeclare



Defrost mode will start if compressor run time is :Defrost mode will start if compressor run time is :

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• RMODE 7.5k ohm resistorRMODE 7.5k ohm resistor

• Indoor fan, auxiliary heater, outdoor fan, 4WV cut off while Indoor fan, auxiliary heater, outdoor fan, 4WV cut off while

compressor remain on compressor remain on

• Defrost mode terminate whenDefrost mode terminate when

1) OD coil temperature > 101) OD coil temperature > 10°C or°C or

2) minimum 10 minutes compressor run time2) minimum 10 minutes compressor run time

• Compressor cut out at the end of defrost cycle, 4WV on Compressor cut out at the end of defrost cycle, 4WV on afterafter

50 seconds50 seconds

• Compressor can cut in after 10 secondsCompressor can cut in after 10 seconds


Defrost Cycle Defrost Cycle

C2.4 versionC2.4 version

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Under Auto mode, COOL & HEAT mode can be changed Under Auto mode, COOL & HEAT mode can be changed

automatically depending on room & set temperatureautomatically depending on room & set temperature


2.6 Auto Mode 2.6 Auto Mode

COOLCOOL HEATHEAT

I)I) TTrr <= T <= Tss mode- 3.5°C AND mode- 3.5°C AND

II)II) The compressor has cut out for at least 10 minsThe compressor has cut out for at least 10 mins

IFIF

(a) If the present Auto mode is COOL,(a) If the present Auto mode is COOL, ( Mode Set Temperature = User Set Temperature)( Mode Set Temperature = User Set Temperature)

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2.6 Auto Mode 2.6 Auto Mode

(b) If the present Auto mode is HEAT,(b) If the present Auto mode is HEAT, ( Mode Set Temperature < User Set Temperature-1.5°C)( Mode Set Temperature < User Set Temperature-1.5°C)

HEATHEAT COOLCOOL

IFIF

(i) T(i) Trr > T > Tss mode + 3°C mode + 3°C ANDAND

(ii) The compressor has cut out for at least 10 mins(ii) The compressor has cut out for at least 10 mins


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2.7 Off Mode 2.7 Off Mode


• No LED indication when unit is turned off

• All relays is turned off immediately after ON/OFF triggering except 4-way valve (subject to 4WV switching time protection)

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3. Protections 3. Protections

3.1 Compressor 3.1 Compressor

3.2 Outdoor Fan Speed Control3.2 Outdoor Fan Speed Control

3.3 Indoor Anti Freeze3.3 Indoor Anti Freeze

3.4 Gas Leak (Outdoor unit abnormal)3.4 Gas Leak (Outdoor unit abnormal)

3.5 Fan Lock3.5 Fan Lock

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3. Protections

3.1 Compressor 3.1 Compressor (a) 3 minutes Minimum OFF time(a) 3 minutes Minimum OFF time

• Compressor can only cut in after a minimum period of 3 mins Compressor can only cut in after a minimum period of 3 mins from the time it cuts off except during valve changeover from the time it cuts off except during valve changeover sequencessequences

• There shall have a minimum delay timer of 2 sec between There shall have a minimum delay timer of 2 sec between outdoor fan & compressor when both turn onoutdoor fan & compressor when both turn on

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3. Protections


(b) Compressor Random Restart(b) Compressor Random Restart

• With memory backup selection, compressor cut in 0-64 sec With memory backup selection, compressor cut in 0-64 sec after power up again after power up again

•Compressor cut in is subjected to thermostat cut in modeCompressor cut in is subjected to thermostat cut in mode

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3. Protections


(c) Compressor Minimum Run Time(c) Compressor Minimum Run Time

• Compressor can only cut out after minimum 3 mins of Compressor can only cut out after minimum 3 mins of running in current moderunning in current mode

• Compressor can cut out at any time is system is switched to Compressor can cut out at any time is system is switched to other modes or other protection sequencesother modes or other protection sequences

(d) Compressor Overload Protection (d) Compressor Overload Protection

• Method to detect compressor overload is by coil sensor Method to detect compressor overload is by coil sensor detectiondetection

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3. Protections


Cooling CycleCooling Cycle

OD coil tempOD coil temp

Comp & OD FanComp & OD Fan

68 68 o o CC

ONON

OFFOFF

Heating CycleHeating Cycle

ID coil tempID coil temp

Comp, OD FanComp, OD Fan& 4WV& 4WV

68 68 o o CC

ONON

OFFOFF

(e) Coil Sensors Detection

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(a) Heating Mode(a) Heating Mode

• Outdoor fan will cut off, if indoor coil temperature > 55˚COutdoor fan will cut off, if indoor coil temperature > 55˚C

• Outdoor fan will resume, if indoor coil temperature < 50˚COutdoor fan will resume, if indoor coil temperature < 50˚C

(b) Cooling Mode(b) Cooling Mode

• Outdoor fan will run when compressor has cut inOutdoor fan will run when compressor has cut in

3. Protections3. Protections

3.2 Outdoor Fan Speed Control 3.2 Outdoor Fan Speed Control

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3. Protections

3.3 Indoor Coil Anti Freeze 3.3 Indoor Coil Anti Freeze Available in COOL mode onlyAvailable in COOL mode only

• IFIF ID Coil Temp reaches 1°C and below for at least 1 min ID Coil Temp reaches 1°C and below for at least 1 min

ANDAND compressor has run for at least 10 minutes compressor has run for at least 10 minutes

11ooCCComp & OD FanComp & OD Fan OFFOFF

ONON

1010ooCC

Comp & OD FanComp & OD Fan

OFFOFF

ONON

• IFIF ID Coil Temp reached 10˚C and above for at least 1 min ID Coil Temp reached 10˚C and above for at least 1 min

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3. Protections

3.4 Gas Leak (Outdoor unit abnormal) 3.4 Gas Leak (Outdoor unit abnormal) This option is selected via resistor RGLThis option is selected via resistor RGL

• Gas leak is declared if ID coil temp. is >25°C in cooling Gas leak is declared if ID coil temp. is >25°C in cooling cycle cycle OR OR < 20°C< 20°C in heating cyclein heating cycle

• System will check the gas leak mode if compressor run System will check the gas leak mode if compressor run time of 30 mins achievedtime of 30 mins achieved

• If these condition is met, the system will reconfirm ID coil If these condition is met, the system will reconfirm ID coil temperature for 5 mins in cool mode temperature for 5 mins in cool mode OROR 5 mins in heat 5 mins in heat mode before declaring gas leak modemode before declaring gas leak mode

• No gas leak checking during outdoor defrost. Compressor No gas leak checking during outdoor defrost. Compressor run timer is resetrun timer is reset

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3. Protections

3.5 Fan Lock3.5 Fan Lock• When there is no feedback from ID fan, unit will wait for 10 When there is no feedback from ID fan, unit will wait for 10 secsec

• After 10 sec, counter in the software will increase by oneAfter 10 sec, counter in the software will increase by one

• Then LED will start blinking to indicate error of the unit Then LED will start blinking to indicate error of the unit while the compressor and OD fan are allowed to on depend while the compressor and OD fan are allowed to on depend on thermostat cycleon thermostat cycle

• If there is no fan speed feedback error continue for If there is no fan speed feedback error continue for another 30 sec, compressor and OD fan will be forced offanother 30 sec, compressor and OD fan will be forced off

• LED will continue blinking and louver is allowed to LED will continue blinking and louver is allowed to operateoperate

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Thank YouThank You

wall mounted j series pcb & algorithm

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