Fujitsu Air Conditioner Error Codes Fujitsu error codes normally appear on the air conditioner’s display to let you know when something has gone awry. But before you can even pinpoint the exact cause of the issue, you will need to know the error code definition and what it means for your unit.
Fujitsu Air Conditioner Error Code Solutions
Contents:
- Fujitsu Ducted Air Conditioning
- Fujitsu Wall Mounted Air Conditioner
- Fujitsu Ceiling Cassette Air Conditioner
- Service manual, installation manual pdf
This model is non-insulated PCB that doesn’t take the insulated structure on the PCB from this fiscal year. Be careful that it is likely to get a hock when it touches the charge part when checking. Moreover, there is a possibility of getting a shock even if it touches the secondary circuit of the display PCB or the stepping motor, etc.
Fujitsu AC Wired Remote Controller Error Codes
When EE:EE is displayed on remote control , press “Energy Save” & “Zone Control” buttons simultaneously for longer than 3 secs. The error code will then be displayed on the LCD.
| Error Codes | Meaning |
|---|---|
| E0:00 | Coms error – indoor to remote |
| E1:00 | Coms error – indoor to outdoor |
| E2:00 | Return air thermistor open circuit |
| E3:00 | Return air thermistor short circuit |
| E4:00 | Indoor coil thermistor open |
| E5:00 | Indoor coil thermistor shorted |
| E6:00 | Outdoor coil thermistor open |
| E7:00 | Outdoor coil thermistor shorted |
| EA:00 | Outdoor ambient thermistor open |
| Eb:00 | Outdoor ambient thermistor shorted |
| Ec:00 | Discharge pipe themistor open |
| Ed:00 | Discharge pipe thermistor shorted |
| EE:00 | High Pressure problem |
| EF:00 | Discharge pipe temp. Problem – too high = short of gas |
| OO | ID to RC Comms Fail |
| O1 | ID to OD Comms Fail |
| O2 | ID Air Sensor Open |
| O3 | ID Air Sensor Close |
| O4 | ID Pipe Sensor Open |
| O5 | ID Pipe Sensor Close |
| O6 | OD Pipe Sensor Fail |
| O8 | Power Source Connection Failure |
| O9 | Drain Problem Float switch operated |
| OA | OD Air Sensor Fail |
| OC | Discharge sensor Fail |
| OE | Outdoor High Pressure Heatsink error |
| 11 | OD PCB Fail |
| 12 | ID Fan Fail |
| 13 | OD Signal Abnormal ID signal error |
| 14 | OD EEPROM Fail |
| 15 | Compressor Temp Failure |
| 16 | Pressure Switch Error |
| 17 | IPM Error |
| 18 | CT Error |
| 19 | Active Filter Module Error |
| 1A | Compressor Failure |
| 1B | OD Fan Failure |
| 1C | Inverter to PCB Comms Fail |
| 1D | 2 Way Valve sensor Fail |
| 1E | Expansion Valve Error |
| 1F | Connection ID Unit Error |
| 20 | Indoor manual switch abnormal |
| 24 | Excessive high pressure protection on cooling |
| 25 | PFC circuit error |
| 26 | Indoor signal error |
| 27 | Indoor signal error |
| 28 | Indoor heat exchanger temperature error |
| 29 | Outdoor heat exchanger temperature (middle) error |
| 2A | Power supply frequency detection error |
| 2B | Compressor temperature error |
| 2C | Four-way valve abnormal |
Press “Energy Save” & “Zone Control” buttons simultaneously for longer than 3 secs to return to normal operating mode.
Fujitsu Air Conditioner Operation Light Flashing
| Red Light Operation | Green Light Timer | Current Models |
|---|---|---|
| Off | 2 Flashes | Reverse Comms Fail at Startup |
| Off | 3 Flashes | Reverse Comms Fail In Use |
| Off | 4 Flashes | Forward Comms Fail at Startup |
| Off | 5 Flashes | Forward Comms Fail In Use |
| Off | 8 Flashes | Wired Remote Control Failure |
| 2 Flashes | 2 Flashes | Indoor Air Sensor Fail |
| 2 Flashes | 3 Flashes | Indoor Pipe Sensor Fail |
| 2 Flashes | 4 Flashes | Indoor heat exchanger sensor error |
| 2 Flashes | 6 Flashes | Float switch operated |
| 3 Flashes | 2 Flashes | OD Disch Sensor Fail |
| 3 Flashes | 3 Flashes | OD Pipe Sensor Fail |
| 3 Flashes | 4 Flashes | OD Air Sensor Fail |
| 3 Flashes | 7 Flashes | Heatsink Sensor Error |
| 3 Flashes | 8 Flashes | Compressor Temp Sensor Fail |
| 4 Flashes | 2 Flashes | Forced Auto Switch Welded |
| 4 Flashes | 3 Flashes | Main Relay Welded |
| 4 Flashes | 4 Flashes | Power Failure |
| 4 Flashes | 7 Flashes | VDD Permament Stop Protection |
| 4 Flashes | 8 Flashes | Reverse VDD Permament Stop |
| 5 Flashes | 2 Flashes | IPM Protection |
| 5 Flashes | 3 Flashes | CT Abnormal |
| 5 Flashes | 5 Flashes | Compressor Failure |
| 5 Flashes | 6 Flashes | Outdoor Fan Failure |
| 6 Flashes | 2 Flashes | ID Fan Motor Locked |
| Flashes | 3 Flashes | ID Fan Motor Rotation Error |
| 7 Flashes | 2 Flashes | High Discharge Temperature |
| 7 Flashes | 3 Flashes | High Pressure |
| 7 Flashes | 4 Flashes | 4-Way valve abnormal |
| 7 Flashes | 5 Flashes | Pressure Switch Fail |
| 7 Flashes | 6 Flashes | Compressor Temperature error |
| 8 Flashes | 2 Flashes | Active Filter AFM Fail 1st Time |
| 8 Flashes | 3 Flashes | Active Filter AFM Fail 2nd Time |
| 8 Flashes | 4 Flashes | PFC Circuit Error |
| Blinking | Blinking | PCB Failure |
If you use a wired type remote controller, error codes will appear on the remote controller display. If you use a wireless remote controller, the lamp on the photodetector unit will output error codes by way of blinking patterns. See the lamp blinking patterns and error codes in the table below. An error display is displayed only during operation.
Fujitsu Air Conditioner Troubleshooting
In the event of a malfunction (burning smell, etc.), immediately stop operation, disconnect the Power Supply Plug, and consult authorized service personnel. Merely turning off the unit’s power switch will not completely disconnect the unit from the power source. Always be sure to disconnect the Power Supply Plug or turn off your circuit breaker to ensure that power is completely off.
Before requesting service, perform the following checks:
Symptom: Doesn’t operate immediately
Problem:
- If the unit is stopped and then immediately started again, the compressor will not operate for about 3 minutes, in order to prevent fuse blowouts.
- Whenever the Power Supply Plug is disconnected and then re- connected to a power outlet, the protection circuit will operate for about 3 minutes, preventing unit operation during that period.
Symptom: Noise is heard
Problem:
- During operation and immediately after stopping the unit, the sound of water flowing in the air conditioner’s piping may be heard. Also, noise may be particularly noticeable for about 2 to 3 minutes after starting operation (sound of coolant flowing).
- During operation, a slight squeaking sound may be heard. This is the result of minute expansion and contraction of the front cover due to temperature changes.
- During Heating operation, a sizzling sound may be heard occasional. This sound is produced by the Automatic Defrosting operation.
Symptom: Smells
Problem: Some smell may be emitted from the indoor unit. This smell is the result of room smells (furniture, tobacco, etc.) which have been taken into the air conditioner.
Symptom: Mist or steam are emitted
Problem:
- During Cooling or Dry operation, a thin mist may be seen emitted from the indoor unit. This results from the sudden Cooling of room air by the air emitted from the air conditioner, resulting in condensation and misting.
- During Heating operation, the outdoor unit’s fan may stop, and steam may be seen rising from the unit. This is due to Automatic Defrosting operation.
Symptom: Airflow is weak or stops
Problem:
- When Heating operation is started, fan speed is temporarily very low, to allow internal parts to warm up.
- During Heating operation, if the room temperature rises above the thermostat setting, the outdoor unit will stop, and the indoor unit will operate at very low fan speed. If you wish to warm the room further, set the thermostat for a higher setting.
- During Heating operation, the unit will temporarily stop opera- tion (between 7 and 15 minutes) as the Automatic Defrosting mode operates. During Automatic Defrosting operation, the OPERATION Indicator Lamp will flash.
- The fan may operate at very low speed during Dry operation or when the unit is monitoring the room’s temperature.
- During SUPER QUIET operation, the fan will operate at very low speed
- In the monitor AUTO operation, the fan will operate at very low speed.
Symptom: Water is produced from the outdoor unit
Problem: During Heating operation, water may be produced from the outdoor unit due to Automatic Defrosting operation.
Symptom: The AIR CLEAN Indicator Lamp (green) will begin to slowly flash (as shown in the figure):
Problem: After approximately 400 hours of Air Cleaning Mode use, the AIR CLEAN Indicator Lamp will begin to flash slowly (as shown in the figure). When this occurs, please stop the system, remove the mains socket and carry out maintenance on the dust collecting unit’s air filter.
Symptom: The AIR CLEAN Indicator Lamp (green) will begin to flash quickly (as shown in the figure):
Problem: After approximately 500 hours of Air Cleaning Mode use, the AIR CLEAN Indicator Lamp will begin to flash quickly (as shown in the figure). At this point, Air Cleaning will stop functioning. Please stop the system, remove the mains socket and carry out maintenance on the dust collecting unit’s air filter.
Symptom: Doesn’t operate at all
Problem:
- Is the Power Supply Plug disconnected its outlet?
- Has there been a power failure?
- Has a fuse blown out, or a circuit breaker been tripped?
- Is the timer operating?
Symptom: Poor Cooling performance
Problem:
- Is the Air Filter dirty?
- Air the air conditioner’s intake grille or outlet port blocked?
- Did you adjust the room temperature settings (thermostat) cor- rectly?
- Is there a window or door open?
- In the case of Cooling operation, is a window allowing bright sun- light to enter? (Close the curtains.)
- In the case of Cooling operation, are there heating apparatus and computers inside the room, or are there too many people in the room?
- Is the unit set for SUPER QUIET operation?