Fujitsu Waterstage Comfort Series Technical manual

Maintenance
Document
intended for professionals
To be saved for
future consultation
Comfort Serie
Document n° 1792-1 ~ 04/05/2016
Air to Water Heat Pump
Fujitsu General (Euro) GmbH
Werftstrasse 20
40549 Düsseldorf - Germany
Subject to modications without notice.
Non contractual document.
Outdoor unit
WOYA060LFCA
WOYA080LFCA
WOYA100LFTA
Hydraulic unit
WSYA050DG6
WSYA100DG6
WGYA050DG6
WGYA100DG6
EN EN IT NL DE

Contents
Control of Electric Backups . . . . . . . . . . . . . . 4 Sensor and Input Test Mode . . . . . . . . . . . . .4
Fault. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fault List. . . . . . . . . . . . . . . . . . . . . . . . 5
Hydraulic Unit Fault. . . . . . . . . . . . . . . 5
Outdoor Unit Fault . . . . . . . . . . . . . . .7
Outdoor Unit Clearing . . . . . . . . . . . . . . . . . 8
Failures with Error Code . . . . . . . . . . . .8
Failures With No Error Code . . . . . . . . . 28
Sensor Values . . . . . . . . . . . . . . . . . . . . 32
Outdoor Unit Temperature Sensors. . . . . . 32
Hydraulic Unit Temperature Sensors . . . . . 32
Service parts information . . . . . . . . . . . . . . 33
Service parts information 1 : Compressor . .33
Service parts information 2 : Inverter compressor 33
Service parts information 3 : Outdoor unit
electronic expansion valve (EEV). . . . . . . 34
Service parts information 4 : Outdoor unit
solenoid valve (SV) . . . . . . . . . . . . . . 35
Service parts information 5 : Outdoor unit fan motor 36
Service parts information 6 : Active lter module
(Only for WO*A080LFCAand WO*A100LFTAmodels) 36
Service parts information 7 : IPM
(mounted on Transistor PCB, Only for
WO*A080LFCA and WO*A100LFTA models) 37
Operating Limits . . . . . . . . . . . . . . . . . . . 38
Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Hydraulic, Electric and Refrigeration Systems . . .39
Hydraulic System . . . . . . . . . . . . . . . 39
Electrical System . . . . . . . . . . . . . . . 40
Refrigeration System . . . . . . . . . . . . . 41
Compressor Operating Checks . . . . . . . . . . . 43
Refrigeration Circuit Leak Test . . . . . . . . . . . 43
Troubleshooting . . . . . . . . . . . . . . . . . . . 43
Control and test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
" This device requires for its installation, the intervention of qualied personnel with a certicate of
capacity for handling refrigerants.
Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
General . . . . . . . . . . . . . . . . . . . . . . .44
Function Table. . . . . . . . . . . . . . . . . . . . 45
Adjustment Function Details. . . . . . . . . . . . . 61
Date and Time Functions. . . . . . . . . . . 61
User Interface Functions . . . . . . . . . . . 61
Time Program Functions (heating circuit 1 & 2,
DHW, cooling) . . . . . . . . . . . . . . . .62
Heating Circuit 1 & 2 Functions. . . . . . . . 63
Cooling Circuit 1 Function . . . . . . . . . .70
DHW Functions (with DHW kit
or with integrated DHW models). . . . . . . . . . . 74
Swimming Pool Functions . . . . . . . . . .75
Heat Pump Functions. . . . . . . . . . . . . 75
Supplementary source . . . . . . . . . . . . 77
DHW Tank Functions (with DHW kit or with
integrated DHW models) . . . . . . . . . . . 78
Conguration Functions . . . . . . . . . . . 79
Error Functions . . . . . . . . . . . . . . . . 80
Maintenance / Special Operating Mode Functions 83
Input / Output Testing Functions . . . . . . . 85
Status Functions . . . . . . . . . . . . . . . 86
Generator Diagnosis Functions. . . . . . . . 88
Consumer Diagnosis Functions . . . . . . .88
Domestic Hot Water (with DHW kit or with
integrated DHW models) . . . . . . . . . . . 89
Hydraulic checks . . . . . . . . . . . . . . . . . .91
Maintenance of the DHW tank (Integrated DHW models) 91
Emptying the hot water tank . . . . . . . . . 91
Descaling . . . . . . . . . . . . . . . . . . . 91
Checking the outdoor unit . . . . . . . . . . . . . . 91
Electrical checks. . . . . . . . . . . . . . . . . . . 91
Maintenance services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Maintenance document "1792 - EN"
Split system single phase type
- 2 -
(Only for WOYA080LFCAand WOYA100LFTA models)
WOYA080LFCA and WOYA100LFTA models)

Emptying the hydraulic unit . . . . . . . . . . . . . 92
Distribution valve . . . . . . . . . . . . . . . . . .92 ACI check . . . . . . . . . . . . . . . . . . . . . . 92
Maintenance (integrated DHW models). . . . . . . . . . . . . . . . . . . . 92
Disassembly Process of Outdoor Unit . . . . . . . . . . . . . . . . . . . . 93
WO*A060LFCA and WO*A080LFCA . . . . . . . . 93
Appearance. . . . . . . . . . . . . . . . . . 93
TOP PANEL removal . . . . . . . . . . . . . 93
FRONT PANEL removal . . . . . . . . . . .94
VALVE COVER removal . . . . . . . . . . . 94
MAIN PCB, TRANSISTOR PCB, and ACTPM
removal . . . . . . . . . . . . . . . . . . . . 94
FAN MOTOR removal . . . . . . . . . . . .97
CABINET RIGHTASSY removal . . . . . . . 97
THERMISTOR removal. . . . . . . . . . . . 98
SOLENOID COIL removal . . . . . . . . . .99
EEV COIL removal . . . . . . . . . . . . . . 99
PRESSURE SENSOR removal. . . . . . . . 99
COMPRESSOR removal . . . . . . . . . . 100
WO*A100LFTA . . . . . . . . . . . . . . . . . . 102
Appearance. . . . . . . . . . . . . . . . . 102
SERVICE PANEL removal . . . . . . . . . 102
TOP PANEL removal . . . . . . . . . . . . 102
VALVE COVER removal . . . . . . . . . . 103
MAIN PCB and POWER PCB removal. . . 103
TRANSISTOR PCB andACTPM PCB removal 104
FAN MOTOR removal . . . . . . . . . . . 105
RIGHT PANEL removal. . . . . . . . . . . 105
THERMISTOR removal. . . . . . . . . . . 106
SOLENOID COIL removal . . . . . . . . . 107
COMPRESSOR removal. . . . . . . . . . 108
Precautions for exchange of refrigerant-cycle-parts.110
Maintenance document "1792 - EN" - 3 -
Split system single phase type
WOYA060LFCA and WOYA080LFCA WOYA100LFTA

1 Control and test
H 33 EX 1 EX 2 EX 3
Outdoor
Unit Fault Load-shedding (EJP) Off-peak/peak hours External fault (369)
(370) 0 V 230 V 230 V 0 V 230 V 0 V 230 V
EJP lock signal
(l 2920) "released" "locked" ON "locked"
HEAT PUMP OFF ON ON OFF ON ON ON OFF
DHW auxiliary ON (1) ON OFF OFF ON OFF ON OFF
1st stage elec.
auxiliary ON (2) ON OFF OFF ON ON ON OFF
2nd stage elec.
auxiliary ON (2) ON OFF OFF ON ON ON OFF
Boiler backup ON (2) ON ON ON ON ON ON OFF
1.1 Control of Electric Backups
1.2 Sensor and Input Test Mode
(1) subject to authorization by EX2
(2) provided the outdoor temperature is less than the setting on "2884 or 3700" (+2° from the beginning)
LINE SENSOR INPUT OUTPUT WATERSTAGE
7700 QX Relay test
7710 UX1 Output test
7712 UX1 PWM-Signal
7722 DO2 Cooling mode
7723 D3 Heat pump
7724 UX3 Output test ("Inverter" command)
7725 UX3 Voltage signal (Ux3)
7820 BX1 Sensor temp (HP ow temperature)
7821 BX2 Sensor temp (HP return temperature)
7822 BX3 Sensor temp (DHW temperature)
7823 BX4 Sensor temp (Outside temperature)
7911 EX1 Input (Power shedding, EJP)
7912 EX2 Input (Tariffs day/night)
7913 EX3 Input (External fault)
7973 BX31 Sensor temp (Mixing circuit temp.)
7976 BX34 Sensor temp (Swimming pool exchanger temperature)
7996 H33 Contact state
Maintenance document "1792 - EN"
Split system single phase type
- 4 -

2 Fault
2.1 Fault List
2.1.1 Hydraulic Unit Fault
Faults which occur on the Hydraulic Unit are shown by
the symbol . Press the info key for details on the cause
of the fault. The following information is displayed :
• Description of the error
• Location of the error (sensor or contact)
•
Reset. Depending on its type, the fault can be manually
or automatically deleted:
•
Manual delete: the text displayed when pressing the info
key shows "reset ?". Press OK once, the yes ashes;
press again to conrm deletion of the fault.
•
Faults whose deletion is automatic are automatically
reset.
• Heat pump op: shows whether or not the heat pump
operates despite the fault.
No.: Designation of error Location (connection) Reset HP op
Manual Auto
10: Outdoor sensor X86 No No Yes
33: Flow sensor HP X70 No No Yes
44: Return sensor HP X70 No No Yes
50: DHW sensor 1 X84 No No Yes
60: Room sensor 1 No No Yes
65: Room sensor 2 No No Yes
105: Maintenance message No No Yes
121: Flow temp HC1 (too low) No No Yes
122: Flow temp HC2 (too low) No No Yes
127: Legionella temp No No Yes
369: External fault (safety component) No No
370: Thermodynamic source* No No No
No connection the polarity of the room
sensor is not respected. - No
* Afault in the outdoor unit is indicated by LED located on the Hydraulic Unit interface board.
Maintenance document "1792 - EN" - 5 -
Split system single phase type

DIP SW
Interface card
LED2
(green)
LED1
(red)
OFF
ON
gure 1 - Location of DIP switches and diodes
on the hydraulic unit interface card
LED display Error contents
LED 2 (green) LED 1 (red)
1 Flash 1 Flash Communication error between Hydraulic unit and Outdoor unit.
2 Flashs 3 Flashs Connection forbidden (series error).
3 Flashs 1 Flash Indoor unit power supply abnormal.
3 Flashs 2 Flashs Serial communication error between Controller /Interface PCBs.
4 Flashes 1 Flash Heat pump capacity signal error (Open or short).
4 Flashes 2 Flashes Hydraulic unit heat-exchange thermistor Error.
6 Flashs 1 Flash Outdoor unit power supply abnormal.
6 Flashs 2 Flashs Outdoor unit main PCB error.
6 Flashes 3 Flashes Inverter error.
6 Flashes 4 Flashes Active lter error.
6 Flashs 5 Flashs Outdoor unit IPM error.
6 Flashs 7 Flashs Outdoor unit power short interruption error (protective operation).
6 Flashs 8 Flashs Outdoor unit magnetic relay error.
7 Flashes 1 Flash Discharge thermistor error.
7 Flashes 2 Flashes Compressor thermistor error.
7 Flashes 3 Flashes Heat-exchange thermistor (outlet / intermediate) error.
7 Flashes 4 Flashes Outdoor thermistor error.
7 Flashs 7 Flashs Outdoor unit heat sink temp. thermistor error.
7 Flashes 8 Flashes Expansion valve thermistor error.
8 Flashes 4 Flashes Current sensor error.
8 Flashes 6 Flashes Pressure sensor error / Pressure switch error.
9 Flashes 4 Flashes Current trip.
9 Flashes 5 Flashes Detection of compressor position error / Compressor start up error.
9 Flashes 7 Flashes Outdoor unit fan motor error.
10 Flashes 1 Flash Discharge temperature protection.
10 Flashes 3 Flashes Compressor temperature protection.
10 Flashs 4 Flashs Outdoor unit pressure error.
10 Flashes 5 Flashes Low pressure abnormal.
10 Flashs 9 Flashs Current overload error.
Continuous ashing (1 sec On / 1 sec Off) Pump down operation.
Continuous lighting Off Defrosting.
Maintenance document "1792 - EN"
Split system single phase type
- 6 -

gure 2 - Typical Wiring of External Devices
EX1
EX2
EX3
X86
L
X84
X11
654
56
M B9
1
12 1 3 2
654
13 2
Power shedding or EJP
(peak day removal)
Tariffs, peak times/off-peak times,
day / night
External fault
** Room
thermostat
T55
** Room
thermostat
radio T58
Outdoor
sensor
** Room
control unit
T75
** Room control
unit radio
T78
External component
contact*
(faults, load
shedder, power meter)
or or or
* If the control device does not provide a potential-free contact,
the contact must be relayed to create equivalent wiring.
In all cases, please refer to the instruction manuals for the external
components (load shedder, power meters) to create the wiring.
** Option
T75 : The connection of terminal 3 of the room control unit T75 is
not mandatory (lighting of the room control unit.
* If the control device does not provide a potential-free contact,
the contact must be relayed to create equivalent wiring.
In all cases, please refer to the instruction manuals for the external
components (load shedder, power meters) to create the wiring.
** Option
The connection of terminal 3 of the remote control is not mandatory
(lighting of the remote control).
Faults external to the heat pump
Any safety device (e.g. thermostat pressure switch) wired to input Ex3 (E20) allows external problems to be reported
and the heat pump to be immediately stopped. For example, a safety thermostat on the heating oor can be wired
to input Ex3 (E20) to avoid excessively high temperatures in the oor.
2.1.2 Outdoor Unit Fault
When the system is switched back on after a power outage, the Hydraulic Unit may display fault 370 for a few tens
of seconds. This is not a serious problem. It simply means that the outdoor unit is running its tests. Once the tests
have been completed, the fault should disappear.
Faults are coded by LED located on the hydraulic unit interface board (see gure 1)
Maintenance document "1792 - EN" - 7 -
Split system single phase type

2.2 Outdoor Unit Clearing
2.2.1 Failures with Error Code
This section describes the techniques which can be used to identify the failure.
Clear 1: Serial reverse transfer error (WO*A060LFCA)
Hydraulic Unit LED: Green 1 ash / Red 1 ash
Outdoor Unit LED: Off
Probable causes
Misconnection.
• External cause.
• Main PCB failure.
• Outdoor unit Fan motor failure.
Check:
1-1. Stop the system and start it again (disconnection time 1min):
Is the error still displayed?
YES NO
3. Check the power supply voltage:
- Check that an AC 198 – 264 V voltage exists between terminals N and L
on the outdoor unit terminal block.
OK
4. Check the serial signal:
- Check the voltage between terminals 1 and 3 of the outdoor terminal block. The
voltage must fluctuate between AC 70 V and AC 130 V.
- If it is abnormal, Check outdoor unit fan motor (Parts Information 5).
- If outdoor fan motor is abnormal, replace Outdoor unit fan motor and main PCB.
- If outdoor fan motor is normal, replace main PCB.
OK
1-2. Check for external causes:
- Check the system's overall isolation.
- Check for any equipment generating harmonic
waves which interfere with the communication
between the hydraulic unit and the outdoor unit.
(Neon light bulb or any electric equipment which
causes harmonic waves).
2. Check the connections:
- Check the connection between the hydraulic
unit and the outdoor unit.
- If there is an abnormal condition, correct it
by referring to Installation manual.
Clear 1
Maintenance document "1792 - EN"
Split system single phase type
- 8 -
(WOYA060LFCA)

Clear 1: Serial reverse transfer error (WO*A080LFCA, WO*A100LFTA)
Hydraulic Unit LED: Green 1 ash / Red 1 ash
Outdoor Unit LED: Off
Probable causes:
• Misconnection.
• External cause.
• Main PCB failure.
• Active lter module failure.
• Transistor PCB (IPM) failure.
• Filter PCB failure.
• Outdoor unit Fan motor failure.
Check :
1-1. Stop the system and start it again (disconnection time 1min):
Is the error still displayed?
YES NO
3. Check the power supply voltage:
- Check that an AC 198 – 264 V voltage exists between terminals N and L
on the outdoor unit terminal block.
OK
4. Check the serial signal:
- Check the voltage between terminals 1 and 3 of the outdoor terminal block. The
- If outdoor fan motor is abnormal, replace Outdoor unit fan motor and main PCB.
- If active filter module or IPM is abnormal, replace it.
- If the parts are normal, replace Main PCB.
voltage must fluctuate between AC 70 V and AC 130 V.
- It it is abnormal, check the parts as follows :
- Outdoor unit fan motor (Parts information 5)
- Active filter module (Parts information 6)
- Transistor PCB (IPM) (Parts information 7)
- Filter PCB (Check the wire of CN110)
OK
1-2. Check for external causes:
- Check the system's overall isolation.
- Check for any equipment generating harmonic
waves which interfere with the communication
between the hydraulic unit and the outdoor unit.
(Neon light bulb or any electric equipment which
causes harmonic waves).
2. Check the connections:
- Check the connection between the hydraulic
unit and the outdoor unit.
- If there is an abnormal condition, correct it
by referring to Installation manual.
- Check the connections between the outdoor
unit main board and the active filter board.
Clear 1
Maintenance document "1792 - EN" - 9 -
Split system single phase type
(WOYA080LFCA, WOYA100LFTA)

Clear 2: Serial forward transfer error
Hydraulic Unit LED: Green 1 ash / Red 1 ash
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• External cause.
• Interface PCB failure.
Check:
1-1. Stop the system and start it again (disconnection time 1min):
Is the error still displayed?
YES NO
3. Check the power supply voltage:
- Check that an AC 198 – 264 V voltage exists between terminals N and L
on the outdoor unit terminal block.
OK
4. Check the serial signal:
- Check the voltage between terminals 1 and 3 of the outdoor terminal block. The
- If the parts are normal, replace Main PCB.
voltage must fluctuate between AC 70 V and AC 130 V.
OK
1-2. Check for external causes:
- Check the system's overall isolation.
- Check for any equipment generating harmonic
waves which interfere with the communication
between the hydraulic unit and the outdoor unit.
(Neon light bulb or any electric equipment which
causes harmonic waves).
2. Check the connections:
- Check the connection between the hydraulic
unit and the outdoor unit.
- If there is an abnormal condition, correct it
by referring to Installation manual.
- Check the connections between the outdoor
unit main board and the active filter board.
Clear 1
Maintenance document "1792 - EN"
Split system single phase type
- 10 -

Clear 4: Heat pump capacity signal error
Hydraulic Unit LED: Green 4 ashes / Red 1 ash
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor failure.
• Interface PCB failure.
Check:
Clear 4:
1. Check connection interface PCB and Heat pump regulator PCB:
-See if the connector has been disconnected.
-See if the connection is correct.
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Check resistance value:
3 pin of CN22 – M < 10Ω
OK
3. Replace interface PCB:
If check point 1 and 2 do not improve the symptom, replace Interface PCB.
OK
Maintenance document "1792 - EN" - 11 -
Split system single phase type

Clear 5: Hydraulic Unit Heat exchanger thermistor error
Hydraulic Unit LED: Green 4 ashes / Red 2 ashes
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor failure.
• Interface PCB failure.
Check:
Clear 5:
1. Check the sensor connection:
-See if the connector has been removed
-See if the connection is correct
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Remove the sensor and check its resistance value :
- Check the resistance value.
Temperature (°C) 0 5 10 15 20 25 30 35 40 45 50
Resistance (k) 176 134 103 80,3 62,9 49,7 39,6 31,7 25,6 20,8 17,1
- If the thermistor is faulty, replace it.
OK
3. Check the electronic board voltage:
- Make sure circuit diagram of hydraulic unit and check terminal voltage at thermistor
(DC5.0V)
- If there is no voltage, replace Interface PCB.
OK
Gray
Gray
Black
Maintenance document "1792 - EN"
Split system single phase type
- 12 -

Clear 7: Discharge thermistor error
Hydraulic Unit LED: Green 7 ashes / Red 1 ash
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor failure.
• Main PCB failure.
Check:
Clear 7:
1. Check the sensor connection:
-See if the connector has been disconnected.
-See if the connection is correct.
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Remove the sensor and check its resistance value:
- Check the resistance value
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 168 130 101 79 63 40 26,3 17,8
Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 12,3 8,7 6,3 4,6 3,4 2
- If the thermistor is faulty, replace it.
OK
OK
WO*A060LFCA WO*A080LFCA WO*A100LFTA
3. Check the electronic board voltage:
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
EXP VALVE
DISCHARGE PIPE
OUTDOOR TEMP
COMPRESSOR
TEMP COMPRESSOR
TEMP
EXP VALVE
OUTDOOR
TEMP
DISCHARGE
PIPE
PIPE
EXP VALVE
COMPRESSOR
TEMP
OUTDOOR
TEMP
PIPE
DISCHARGE
PIPE
- If there is no voltage, replace Main PCB.
Maintenance document "1792 - EN" - 13 -
Split system single phase type
WOYA060LFCA WOYA080LFCA WOYA100LFTA

Clear 8: Heat-exchange thermistor (outlet) error :
Hydraulic Unit LED: Green 7 ashes / Red 3 ashes
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor fault.
• Main PCB failure.
Check:
Clear 8:
1. Check the sensor connection:
-See if the connector has been disconnected.
-See if the connection is correct.
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
OK
OK
2. Remove the sensor and check its resistance value :
- Check the resistance value.
Temperature (°C) -20 -10 -5 0 5 10 15 20 30 40 50 60 70
Resistance (kΩ) 115 62,3 46,6 35,2 26,9 20,7 16,1 12,6 7,97 5,18 3,45 2,36 1,65
- If the thermistor is faulty, replace it.
3. Check the electronic board voltage:
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
WO*A060LFCA WO*A080LFCA WO*A100LFTA
- If there is no voltage, replace Main PCB.
EXP VALVE
PIPE
DISCHARGE PIPE
OUTDOOR TEMP
COMPRESSOR
TEMP COMPRESSOR
TEMP
EXP VALVE
OUTDOOR
TEMP
DISCHARGE
PIPE
PIPE
EXP VALVE
COMPRESSOR
TEMP
OUTDOOR
TEMP
PIPE
DISCHARGE
PIPE
Maintenance document "1792 - EN"
Split system single phase type
- 14 -
WOYA060LFCA WOYA080LFCA WOYA100LFTA

Clear 9:
1. Check the sensor connection :
-See if the connector has been disconnected.
-See if the connection is correct.
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Remove the sensor and check its resistance value :
- Check the resistance value.
Temperature (°C) -20 -10 -5 0 5 10 15 20 30 40 50 60 70
Resistance (kΩ) 115 62,3 46,6 35,2 26,9 20,7 16,1 12,6 7,97 5,18 3,45 2,36 1,65
- If the thermistor is faulty, replace it.
OK
OK
3. Check the electronic board voltage:
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
WO*A060LFCA WO*A080LFCA WO*A100LFTA
- If there is no voltage, replace Main PCB.
EXP VALVE
PIPE
DISCHARGE PIPE
OUTDOOR TEMP
COMPRESSOR
TEMP COMPRESSOR
TEMP
EXP VALVE
OUTDOOR
TEMP
DISCHARGE
PIPE
PIPE
EXP VALVE
COMPRESSOR
TEMP
OUTDOOR
TEMP
PIPE
DISCHARGE
PIPE
Clear 9: Outdoor temperature thermistor error
Hydraulic Unit LED: Green 7 ashes / Red 4 ashes
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor failure.
• Main PCB failure.
Check:
Maintenance document "1792 - EN" - 15 -
Split system single phase type
WOYA060LFCA WOYA080LFCA WOYA100LFTA

Clear 11: Compressor thermistor error
Hydraulic Unit LED: Green 7 ashes / Red 2 ashes
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor failure.
• Main PCB failure.
Check:
Clear 11:
1. Check the sensor connection:
-See if the connector has been removed
-See if the connection is correct
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Remove the sensor and check its resistance value :
- Check the resistance value.
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 168 130 101 79 63 40 26,3 17,8
Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 12,3 8,7 6,3 4,6 3,4 2
- If the thermistor is faulty, replace it.
OK
OK
3. Check the electronic board voltage:
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
WO*A060LFCA WO*A080LFCA WO*A100LFTA
- If there is no voltage, replace Main PCB.
EXP VALVE
PIPE
DISCHARGE PIPE
OUTDOOR TEMP
COMPRESSOR
TEMP COMPRESSOR
TEMP
EXP VALVE
OUTDOOR
TEMP
DISCHARGE
PIPE
PIPE
EXP VALVE
COMPRESSOR
TEMP
OUTDOOR
TEMP
PIPE
DISCHARGE
PIPE
Maintenance document "1792 - EN"
Split system single phase type
- 16 -
WOYA060LFCA WOYA080LFCA WOYA100LFTA

Clear 14: Expansion valve thermistor error
Hydraulic Unit LED: Green 7 ashes / Red 8 ashes
Outdoor Unit LED: ash
Probable causes:
• Misconnection.
• Sensor failure.
• Main PCB failure.
Check:
Clear 14:
1. Check the sensor connection:
-See if the connector has been removed
-See if the connection is correct
-Check for any damage on the sensor cable.
After solving the misconnection problem, switch the heat pump back on.
2. Remove the sensor and check its resistance value :
- Check the resistance value.
Temperature (°C) 0 5 10 15 20 30 40 50
Resistance (kΩ) 168 130 101 79 63 40 26,3 17,8
Temperature (°C) 60 70 80 90 100 120
Resistance (kΩ) 12,3 8,7 6,3 4,6 3,4 2
- If the thermistor is faulty, replace it.
OK
OK
3. Check the electronic board voltage:
Make sure circuit diagram of outdoor unit and check terminal voltage at thermistor (DC5.0V)
WO*A060LFCA WO*A080LFCA WO*A100LFTA
- If there is no voltage, replace Main PCB.
EXP VALVE
PIPE
DISCHARGE PIPE
OUTDOOR TEMP
COMPRESSOR
TEMP COMPRESSOR
TEMP
EXP VALVE
OUTDOOR
TEMP
DISCHARGE
PIPE
PIPE
EXP VALVE
COMPRESSOR
TEMP
OUTDOOR
TEMP
PIPE
DISCHARGE
PIPE
Maintenance document "1792 - EN" - 17 -
Split system single phase type
WOYA060LFCA WOYA080LFCA WOYA100LFTA

Clear 15: Current trip (permanent stoppage)
Hydraulic Unit LED: Green 9 ashes / Red 4 ashes
Outdoor Unit LED: ash
Probable causes:
• Connection failure.
• Outdoor Heat Exchanger clogged.
• Outdoor Fan operation failure.
• Compressor failure.
• Main PCB failure.
• Transistor PCB (IPM) (only for WO*A080LFCA, WO*A100LFTA model)
Check:
Clear 15:
1. Check connections condition in control unit:
- Check if the terminal connection is loose.
- Check if connector is removed.
- Check if connector is erroneous connection.
- Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
OK
3. Check Outdoor Fan:
- Check Outdoor Fan Motor. (Refer to Clear 18)
If the Fan Motor is failure, replace it.
OK
4. Check transistor PCB (IPM) (only for 080 and 100 model) :
- Check IPM. (PARTS INFORMATION 7)
If it is abnormal, replace compressor PCB.
OK
2. Check Outdoor Heat Exchanger:
- Is there any obstructing the air flow route?
- Is there any clogging of outdoor unit Heat Exchanger?
If clogged, clear the clog.
5. Check Main PCB :
6. Replace compressor :
If Check Point 1 ~ 4 do not improve the symptom, replace main PCB.
If Check Point 1 ~ 5 do not improve the symptom, replace compressor.
OK
OK
Maintenance document "1792 - EN"
Split system single phase type
- 18 -
(only for WOYA080LFCA, WOYA100LFTAmodel)

Clear 16: Current sensor error
Hydraulic Unit LED: Green 8 ashes / Red 4 ashes
Outdoor Unit LED: ash
Probable causes:
• Defective connection of electric components.
• External cause.
• Main PCB failure.
Check:
1-1. Reset power supply and operate : 1-2. Check external cause at indoor and outdoor
(voltage drop or noise) :
Does error indication show again ?
2. Check connections of outdoor unit electrical
components :
- Check if the terminal connection is loose.
- Check if connector is removed
- Check erroneous connection
Upon correcting the removed connector or
mis-wiring, reset the power.
3. Replace main PCB :
If checkpoints 1 and 2 do not improve the symptom, change main PCB
No
Ok
• Instant drop
Check if there is a large load electric
apparatus in the same circuit.
• Momentary power failure
Check if there is a defective contact or leak
current in the power supply circuit.
• Noise
- Check if there is any equipment causing
harmonic wave near electric line.
(Neon bulb or electric equipment that
may cause harmonic wave)
- Check the complete insulation
of grounding.
Yes
Maintenance document "1792 - EN" - 19 -
Split system single phase type

Clear 17: Compressor startup error (permanent stoppage)
Defection of compressor position error
Hydraulic Unit LED: Green 9 ashes / Red 5 ashes
Outdoor Unit LED: ash
Probable causes:
• Misconnection of the various electrical components.
• Main PCB failure.
• Compressor failure.
• Transistor PCB (IPM) failure (only for 080 and 100 model)
Check:
Clear 17:
2. Check transistor PCB (IPM) (only for 080 and 100 model) :
1. Check connections of around the compressor components :
- Check IPM (PARTS INFORMATION 7)
If IPM is abnormal, replace transistor PCB.
3. Check Compressor:
4. Replace the electronic board :
Refer to “Service parts information 2 : Inverter compressor
If it is abnormal, replace compressor.
- If steps 1~3 do not solve the problem, replace Inverter PCB.
OK
OK
- Check if the terminal connection is loose.
- Check if connector is removed.
- Check if connector is erroneous connection.
- Check if cable is open.
Upon correcting the removed connector or mis-wiring, reset the power.
OK
Maintenance document "1792 - EN"
Split system single phase type
- 20 -