In the tables below you can find the list of possible troubles which you can encounter using your Fujitsu heat pump. The information given there may be helpful in case of your heat pump not working properly.
The types of defects or breakdowns are various. There are detailed descriptions of possible problems and causes of heat pump not cooling or heat pump fan not spinning. Here you can find some questions which give you the idea what to investigate or to check before addressing to the specialists.
The Fujitsu heat pump flash codes given in the tables and their descriptions are meant to give you the key to the possible problems you have with your heat pump. Do not try to do any repair if you are not a specialist!
Fujitsu 112 Heat Pump Troubleshooting
Diode display | Error contents |
---|
1 Flash | Serial forward transfer error. |
2 Flashes | Discharge thermistor error. |
3 Flashes | Pressure sensor error. |
4 Flashes | Heat-exchange thermistor (outlet) error. |
5 Flashes | Heat-exchange thermistor (intermediate) error. |
6 Flashes | Expansion valve thermistor error. |
7 Flashes | Outdoor temperature thermistor error. |
8 Flashes | Compressor thermistor error. |
9 Flashes | Heat sink thermistor (inverter) error. |
10 Flashes | Heat sink thermistor (P.F.C.) error. |
11 Flashes | Discharge temperature protection (permanent stoppage). |
12 Flashes | Compressor temperature protection (permanent stoppage). |
13 Flashes | Current trip (permanent stoppage). |
14 Flashes | Detection of compressor position error (permanent stoppage). |
15 Flashes | Compressor start up error (permanent stoppage). |
16 Flashes | Fan motor (1) error (permanent stoppage). |
17 Flashes | Fan motor (2) error (permanent stoppage). |
18 Flashes | Inverter error. |
19 Flashes | P.F.C. error. |
20 Flashes | Low pressure abnormal. |
21 Flashes | Connection with hydraulic unit error. |
22 Flashes | Hydraulic unit abnormality condition. |
Fujitsu Waterstage WOYG112LCTA Heat Pump Troubleshooting
Outdoor unit Error number | LED 2 (green) | LED 1 (red) | Error contents |
---|
11 | 1 Flash | 1 Flash | Communication error between Hydraulic unit and Outdoor unit. |
23 | 2 Flashs | 3 Flashs | Connection forbidden (series error). |
31 | 3 Flashs | 1 Flash | Indoor unit power supply abnormal. |
32 | 2 Flashs | Serial communication error between Controller /Interface PCBs. |
41 | 4 Flashes | 1 Flash | Heat pump capacity signal error (Open or short). |
42 | 2 Flashes | Hydraulic unit heat-exchange thermistor Error. |
61 | 6 Flashs | 1 Flash | Outdoor unit power supply abnormal. |
62 | 2 Flashs | Outdoor unit main PCB error. |
63 | 3 Flashes | Inverter error. |
64 | 4 Flashes | Active filter error. |
65 | 5 Flashs | Outdoor unit IPM error. |
67 | 7 Flashs | Outdoor unit power short interruption error (protective operation). |
68 | 8 Flashs | Outdoor unit magnetic relay error. |
71 | 7 Flashes | 1 Flash | Discharge thermistor error. |
72 | 2 Flashes | Compressor thermistor error. |
73 | 3 Flashes | Heat-exchange thermistor (outlet / intermediate) error. |
74 | 4 Flashes | Outdoor thermistor error. |
77 | 7 Flashs | Outdoor unit heat sink temp, thermistor error. |
78 | 8 Flashes | Expansion valve thermistor error. |
84 | 8 Flashes | 4 Flashes | Current sensor error. |
86 | 6 Flashes | Pressure sensor error Z Pressure switch error. |
94 | 9 Flashes | 4 Flashes | Current trip. |
95 | 5 Flashes | Detection of compressor position error Z Compressor start up error. |
97 | 7 Flashes | Outdoor unit fan motor error. |
A1 | 10 Flashes | 1 Flash | Discharge temperature protection. |
A3 | 3 Flashes | Compressor temperature protection. |
A4 | 4 Flashs | Outdoor unit pressure error. |
A5 | 5 Flashes | Low pressure abnormal. |
A9 | 9 Flashs | Current overload error. |
Fujitsu AOYA18LALL Heat Pump Troubleshooting
Error number | Error description | Heat pump operation despite the error |
---|
- | No connection | No |
10 | Outdoor sensor | Yes with OT = 0 °C |
33 | Heat pump initial temperature sensor error | Yes |
44 | Heat pump return temperature sensor error |
50 | DHW temperature sensor |
60 | Ambient temperature sensor 1 |
65 | Ambient temperature sensor 2 |
105 | Maintenance message |
121 | Flow temperature for (HC1) not reached |
122 | Flow temperature for (HC2) not reached |
127 | Anti-legionella temperature not reached |
369 | External fault (safety component) | No |
Fujitsu WSYA 065 DA Heat Pump Troubleshooting
Diode display | Erroneous element |
---|
1 Flash | Transmission error, "hydraulic module - outside unit" |
2 Flashes | Abnormal discharge temperature or defective discharge sensor |
3 Flashes | Defective exchanger sensor |
4 Flashes | Defective outside temperature sensor |
5 Flashes | Abnormal compressor temperature or defective compressor temperature sensor |
6 Flashes | HP pressure switch cut off |
7 Flashes | Abnormal current quality |
8 Flashes | Current quality detection circuit defective |
9 Flashes | Active filter error |
10 Flashes | Compressor is not operating |
11 Flashes | External fan error |
12 Flashes | Compressor casing resistance fault |
13 Flashes | Active filter cut off for over-intensity |
Fujitsu AOYA30LBTL Heat Pump Troubleshooting
Diode display | Erroneous element |
---|
0,1 seconds lit and 0,1 seconds unlit | Defective temperature sensor (see hydraulic module) |
0,5 seconds lit and 0,5 seconds unlit | Abnormal intensity detector error |
2 seconds lit and 2 seconds unlit | Electric current circuit breaker error |
5 seconds lit and 5 seconds unlit | Defective fan motor |
0,1 seconds lit and 2 seconds unlit | Position of the compressor's rotor not detected |
5 seconds lit and 0,1 seconds unlit | Abnormal PAM circuit voltage |
1 seconds lit and 0,1 seconds unlit | Timer cut off |
2 seconds lit and 5 seconds unlit | Abnormal compressor temperature |
5 seconds lit and 2 seconds unlit | Active filter error |
Permanently lit | Abnormal discharge temperature |
Fujitsu AOY54LJBYL Heat Pump Troubleshooting
Diode display | Erroneous element |
---|
0,1 seconds lit and 0,1 seconds unlit | Defective temperature sensor (see hydraulic module) |
0,5 seconds lit and 0,5 seconds unlit | Defective I PM card |
2 seconds lit and 2 seconds unlit | Communication serial bus error (terminals 3 outside unit & hydraulic module) |
5 seconds lit and 5 seconds unlit | Defective fan motor |
0,1 seconds lit and 2 seconds unlit | Position of the compressor's rotor not detected |
5 seconds lit and 0,1 seconds unlit | Defective ACTPM card |
Permanently lit | Abnormal discharge temperature |