What does your Fujitsu General fault code mean?
Pick the code showing on your remote, wall controller or indoor unit and see what it means, what commonly causes it, and what is safe to check yourself. This page covers 67 Fujitsu General fault codes for units sold in Australia, compiled from official Australian manufacturer and distributor documentation, the same references our own technicians carry.
Heads up: Fujitsu General uses the same code with different meanings on different product ranges, so check the model range shown next to the code.
Every Fujitsu General fault code at a glance
Some models show faults as a flashing-light pattern instead of a code; documented lamp patterns are listed alongside their codes.
| Code | What it means | Severity |
|---|---|---|
| 00 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series)) | The wired wall controller cannot communicate with the indoor unit. | Fault – service needed |
| 01 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series)) also shown as 26, 27 |
A communication fault inside the system, between the indoor and outdoor units or between the indoor unit’s own circuit boards. | Fault – service needed |
| 02 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series); the short circuit variant 03 is documented for the older ART ducted systems (ART-LUAD and ART-LUAK series)) also shown as 03 |
The sensor that reads the room air temperature has failed (code 02 is an open circuit; on older ART ducted systems code 03 indicates the same sensor short circuited). | Fault – service needed |
| 04 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series); the short circuit variant 05 is documented for the older ART ducted systems (ART-LUAD and ART-LUAK series)) also shown as 05 |
The temperature sensor in the middle of the indoor coil has failed (code 04 is an open circuit; on older ART ducted systems code 05 indicates the same sensor short circuited). | Fault – service needed |
| 06 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series); the short circuit variant 07 is documented for the older ART ducted systems (ART-LUAD and ART-LUAK series)) also shown as 07 |
The temperature sensor at the outlet of the outdoor coil has failed (code 06 is an open circuit; on older ART ducted systems code 07 indicates the same sensor short circuited). | Fault – service needed |
| 08 (Older ART ducted systems (ART-LUAD and ART-LUAK series)) | The power supply to the unit is connected incorrectly, such as a missing or wrongly wired phase. | Fault – service needed |
| 09 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series); on J Series multi systems E:09 instead means a room temperature sensor fault) also shown as E:09 |
The float switch has tripped because condensate water is not draining away. | Fault – service needed |
| 0A (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series); the short circuit variant 0b is documented for the older ART ducted systems (ART-LUAD and ART-LUAK series)) also shown as 0b |
The sensor that reads the outside air temperature has failed (code 0A is an open circuit; on older ART ducted systems code 0b indicates the same sensor short circuited). | Fault – service needed |
| 0C (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series); the short circuit variant 0d is documented for the older ART ducted systems (ART-LUAD and ART-LUAK series)) also shown as 0d |
The temperature sensor on the compressor discharge pipe has failed (code 0C is an open circuit; on older ART ducted systems code 0d indicates the same sensor short circuited). | Fault – service needed |
| 0F (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series)) | The compressor discharge temperature climbed too high, which can mean the system is low on refrigerant. | Fault – service needed |
| 11 (Current splits, ducted, multi-head and cassette systems (varies by series); on older ducted systems (ART-LUAD/LUAK, ABTF and ARTC72/90 series) 11 instead means a model information error, and on J Series multi systems E:11 means a drain fault) also shown as E:11, Operation LED 1 flash + Timer LED 1 flash, Economy LED continuous flash |
The indoor and outdoor units have stopped communicating with each other. | Fault – service needed |
| 12 (Current splits, ducted, multi-head and cassette systems with a wired wall controller) also shown as E:12, Operation LED 1 flash + Timer LED 2 flashes, Economy LED continuous flash |
The wired wall controller has lost communication with the indoor unit. | Fault – service needed |
| 15 (Current splits, multi-head and cassette systems (cassette confirmed on AUTG54LRLA; varies by series)) also shown as Operation LED 1 flash + Timer LED 5 flashes, Economy LED continuous flash |
The installer’s commissioning test run was never completed, so the system will not run normally. | Minor fault |
| 21 (Multi-head systems, branch-box setups and simultaneous-multi cassettes (AUTG54LRLA and similar); on J Series multi systems E:21 instead means a parallel communication error) also shown as Operation LED 2 flashes + Timer LED 1 flash, Economy LED continuous flash |
The wiring and pipework between the units does not match what the system expects. | Fault – service needed |
| 22 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:22, Operation LED 2 flashes + Timer LED 2 flashes, Economy LED continuous flash |
The connected indoor unit’s capacity does not match what the outdoor unit expects. | Fault – service needed |
| 23 (Multi-head systems; older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as Operation LED 2 flashes + Timer LED 3 flashes, Economy LED continuous flash |
The combination of indoor units connected is not one the outdoor unit supports. | Fault – service needed |
| 24 (Multi-head systems and branch-box setups; older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as Operation LED 2 flashes + Timer LED 4 flashes, Economy LED continuous flash |
The system has detected the wrong number of indoor units or branch boxes connected. | Fault – service needed |
| 27 (Current simultaneous-multi cassette and ducted systems (AUTG54LRLA and similar); on older ARTA/AUTA/ABTA systems 27 instead indicates an indoor signal (display PCB) communication error – see code 01) also shown as E:27, Operation LED 2 flashes + Timer LED 7 flashes, Economy LED continuous flash |
The master and slave unit set-up of a simultaneous multi system is wrong or has been lost. | Fault – service needed |
| 28 (Older ducted, cassette and floor console systems (ARTA, AUTA, ABTA and similar series)) | The temperature sensor at the inlet of the indoor coil has failed. | Fault – service needed |
| 31 (Ducted systems (ARTG series) and larger wall splits (ASTG34LFCA and similar); on older three phase ducted and cassette systems (ARTC-LCTU, AUTA54LCLU) 31 instead means a master and slave unit set-up error) also shown as E:31, Operation LED 3 flashes + Timer LED 1 flash, Economy LED continuous flash |
Power to the system was interrupted while it was running. | Minor fault |
| 32 (Current splits, ducted, multi-head and cassette systems (varies by series); on older three phase ducted systems (ARTC-LCTU, AUTA54LCLU) 32 instead means an indoor unit number set-up error, and on J Series multi systems E:32 means an outdoor unit fault; older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:32, Operation LED 3 flashes + Timer LED 2 flashes, Economy LED continuous flash |
The main circuit board inside the indoor unit has failed or lost its stored settings. | Fault – service needed |
| 35 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:35, Operation LED 3 flashes + Timer LED 5 flashes, Economy LED continuous flash |
The manual auto button on the indoor unit is stuck or faulty. | Minor fault |
| 39 (Ducted systems (ARTG series) and larger wall splits (ASTG34LFCA and similar)) also shown as E:39, Operation LED 3 flashes + Timer LED 9 flashes, Economy LED continuous flash |
The circuit that drives the indoor fan motor has failed. | Fault – service needed |
| 41 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:41, Operation LED 4 flashes + Timer LED 1 flash, Economy LED continuous flash |
The sensor that reads the room air temperature has failed. | Fault – service needed |
| 42 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:42, Operation LED 4 flashes + Timer LED 2 flashes, Economy LED continuous flash |
The temperature sensor on the indoor coil (heat exchanger) has failed. | Fault – service needed |
| 51 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:51, Operation LED 5 flashes + Timer LED 1 flash, Economy LED continuous flash |
The indoor fan motor has failed or cannot spin properly. | Fault – service needed |
| 53 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:53, Operation LED 5 flashes + Timer LED 3 flashes, Economy LED continuous flash |
The system has detected a condensate drainage problem, usually water not draining away. | Fault – service needed |
| 57 (Cassette and ducted systems with motorised dampers (varies by series); older AWT wall splits (AWT14/17LSAZ) instead use 57 for a fan communication fault) also shown as E:57, Operation LED 5 flashes + Timer LED 7 flashes, Economy LED continuous flash |
A damper inside the indoor unit is not moving correctly. | Minor fault |
| 59 (Ducted systems (ARTG series) and larger wall splits (ASTG34LFCA and similar)) also shown as E:59, Operation LED 5 flashes + Timer LED 9 flashes, Economy LED continuous flash |
The second indoor fan motor in the ducted unit has failed. | Fault – service needed |
| 5U (Ducted systems (ARTG series) and larger wall splits (ASTG34LFCA and similar)) also shown as E:5U, Operation LED 5 flashes + Timer LED 15 flashes, Economy LED continuous flash |
The indoor unit has reported a general fault. | Fault – service needed |
| 62 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:62, Operation LED 6 flashes + Timer LED 2 flashes, Economy LED continuous flash |
The main circuit board in the outdoor unit has failed or has the wrong model information stored. | Fault – service needed |
| 63 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:63, Operation LED 6 flashes + Timer LED 3 flashes, Economy LED continuous flash |
The inverter, which controls the compressor speed, has failed in the outdoor unit. | Fault – service needed |
| 64 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:64, Operation LED 6 flashes + Timer LED 4 flashes, Economy LED continuous flash |
The active filter or PFC power circuit in the outdoor unit has failed. | Fault – service needed |
| 65 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:65, Operation LED 6 flashes + Timer LED 5 flashes, Economy LED continuous flash |
The IPM, the power module that drives the compressor, has reported a fault. | Fault – service needed |
| 6A (Current cassette and ducted systems with wired controllers (varies by series)) also shown as E:6A, Operation LED 6 flashes + Timer LED 10 flashes, Economy LED continuous flash |
The display panel and the main circuit board inside the indoor unit have stopped talking to each other. | Fault – service needed |
| 71 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:71, Operation LED 7 flashes + Timer LED 1 flash, Economy LED continuous flash |
The temperature sensor on the compressor discharge pipe has failed. | Fault – service needed |
| 72 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:72, Operation LED 7 flashes + Timer LED 2 flashes, Economy LED continuous flash |
The temperature sensor on the compressor body has failed. | Fault – service needed |
| 73 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:73, Operation LED 7 flashes + Timer LED 3 flashes, Economy LED continuous flash |
A temperature sensor on the outdoor coil (heat exchanger) has failed. | Fault – service needed |
| 74 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:74, Operation LED 7 flashes + Timer LED 4 flashes, Economy LED continuous flash |
The sensor that reads the outside air temperature has failed. | Fault – service needed |
| 75 (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:75, Operation LED 7 flashes + Timer LED 5 flashes, Economy LED continuous flash |
The temperature sensor on the suction gas pipe has failed. | Fault – service needed |
| 76 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:76, Operation LED 7 flashes + Timer LED 6 flashes, Economy LED continuous flash |
A temperature sensor on a refrigerant valve in the outdoor unit has failed. | Fault – service needed |
| 77 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:77, Operation LED 7 flashes + Timer LED 7 flashes, Economy LED continuous flash |
The temperature sensor on the outdoor unit’s heat sink has failed. | Fault – service needed |
| 82 (Larger wall splits (ASTG24, ASTG34 and similar series) and cassettes (AUTG54LRLA); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:82, Operation LED 8 flashes + Timer LED 2 flashes, Economy LED continuous flash |
A temperature sensor on the sub-cool heat exchanger gas pipe has failed. | Fault – service needed |
| 83 (Larger wall splits (ASTG24, ASTG34 and similar series) and cassettes (AUTG54LRLA); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault) also shown as E:83, Operation LED 8 flashes + Timer LED 3 flashes, Economy LED continuous flash |
The temperature sensor on the liquid refrigerant pipe has failed. | Fault – service needed |
| 84 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:84, Operation LED 8 flashes + Timer LED 4 flashes, Economy LED continuous flash |
The sensor that measures how much current the compressor is drawing has failed. | Fault – service needed |
| 86 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:86, Operation LED 8 flashes + Timer LED 6 flashes, Economy LED continuous flash |
A refrigerant pressure sensor or the high pressure safety switch has reported a fault. | Fault – service needed |
| 94 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:94, Operation LED 9 flashes + Timer LED 4 flashes, Economy LED continuous flash |
The outdoor unit shut down after detecting too much electrical current. | Fault – service needed |
| 95 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:95, Operation LED 9 flashes + Timer LED 5 flashes, Economy LED continuous flash |
The compressor motor could not start or run correctly, so the system shut down. | Fault – service needed |
| 97 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:97, Operation LED 9 flashes + Timer LED 7 flashes, Economy LED continuous flash |
The outdoor fan motor has failed or cannot spin properly. | Fault – service needed |
| 98 (Ducted systems (ARTG series) and larger wall splits (ASTG34LFCA and similar)) also shown as E:98, Operation LED 9 flashes + Timer LED 8 flashes, Economy LED continuous flash |
The second outdoor fan motor has failed or cannot spin properly. | Fault – service needed |
| 99 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:99, Operation LED 9 flashes + Timer LED 9 flashes, Economy LED continuous flash |
The 4-way valve, which switches the system between heating and cooling, is not working correctly. | Fault – service needed |
| 9A (Current cassette and ducted systems with wired controllers (varies by series)) also shown as E:9A, Operation LED 9 flashes + Timer LED 10 flashes, Economy LED continuous flash |
The electronic expansion valve coil in the outdoor unit is faulty or disconnected. | Fault – service needed |
| A1 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:A1, Operation LED 10 flashes + Timer LED 1 flash, Economy LED continuous flash |
The compressor discharge temperature climbed too high, so the system shut down to protect itself. | Fault – service needed |
| A3 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:A3, Operation LED 10 flashes + Timer LED 3 flashes, Economy LED continuous flash |
The compressor body temperature climbed too high, so the system shut down to protect itself. | Fault – service needed |
| A4 (Current cassette and ducted systems with wired controllers (varies by series)) also shown as E:A4, Operation LED 10 flashes + Timer LED 4 flashes, Economy LED continuous flash |
Refrigerant pressure on the high side climbed too far, so the system shut down to protect itself. | Fault – service needed |
| A5 (Current splits, ducted, multi-head and cassette systems (varies by series)) also shown as E:A5, Operation LED 10 flashes + Timer LED 5 flashes, Economy LED continuous flash |
Refrigerant pressure on the low side has dropped too far, often a sign of a gas leak. | Fault – service needed |
| E0:00 (Older systems with hardwired wall controllers) | The wall controller has lost communication with the indoor unit. | Fault – service needed |
| E1:00 (Older systems with hardwired wall controllers) | The indoor and outdoor units have stopped communicating with each other. | Fault – service needed |
| E2:00 (Older systems with hardwired wall controllers) also shown as E3:00 |
The return air temperature sensor is not reading correctly (E2:00 open circuit, E3:00 short circuit). | Fault – service needed |
| E4:00 (Older systems with hardwired wall controllers) also shown as E5:00 |
The indoor coil temperature sensor has failed (E4:00 open circuit, E5:00 short circuit). | Fault – service needed |
| E6:00 (Older systems with hardwired wall controllers) also shown as E7:00 |
The outdoor coil temperature sensor has failed (E6:00 open circuit, E7:00 short circuit). | Fault – service needed |
| EA:00 (Older systems with hardwired wall controllers) also shown as Eb:00, EB:00 |
The outdoor air temperature sensor has failed (EA:00 open circuit, Eb:00 short circuit). | Fault – service needed |
| EC:00 (Older systems with hardwired wall controllers) also shown as Ec:00, Ed:00, ED:00 |
The discharge pipe temperature sensor has failed (Ec:00 open circuit, Ed:00 short circuit). | Fault – service needed |
| EE:00 (Older systems with hardwired wall controllers) | The system shut down on a high refrigerant pressure problem. | Fault – service needed |
| EE:EE (Systems with wired wall controllers (splits, ducted, multi-head, cassette)) also shown as E:EE, EE |
The system has locked out because it detected a fault; the controller is holding the actual error code in memory for a technician to retrieve. | Fault – service needed |
| EF:00 (Older systems with hardwired wall controllers) | The discharge pipe temperature climbed too high, which often means the system is short of refrigerant gas. | Fault – service needed |
| J2 (Multi-head systems with branch boxes (Flexible Multi)) also shown as E:J2, Operation LED 13 flashes + Timer LED 2 flashes, Economy LED continuous flash |
A branch box in the multi-head system has a fault or has stopped communicating. | Fault – service needed |
The most serious Fujitsu General fault codes explained
What does Fujitsu General fault code 11 mean? (Current splits, ducted, multi-head and cassette systems (varies by series); on older ducted systems (ART-LUAD/LUAK, ABTF and ARTC72/90 series) 11 instead means a model information error, and on J Series multi systems E:11 means a drain fault)
The indoor and outdoor units have stopped communicating with each other.
Likely causes:
- Damaged or loose interconnecting cable between indoor and outdoor units
- Power interruption or surge damage to a circuit board
- Indoor or outdoor unit PCB failure
Safe checks before you call:
- Check the outdoor unit isolator switch is on
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 12 mean? (Current splits, ducted, multi-head and cassette systems with a wired wall controller)
The wired wall controller has lost communication with the indoor unit.
Likely causes:
- Loose or damaged controller cable
- Wall controller fault
- Indoor unit PCB fault
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 21 mean? (Multi-head systems, branch-box setups and simultaneous-multi cassettes (AUTG54LRLA and similar); on J Series multi systems E:21 instead means a parallel communication error)
The wiring and pipework between the units does not match what the system expects.
Likely causes:
- Interconnecting wiring and refrigerant pipes crossed between rooms during installation
- Wiring altered after installation
- Unit number or refrigerant circuit address setting error on simultaneous multi systems
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 22 mean? (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault)
The connected indoor unit’s capacity does not match what the outdoor unit expects.
Likely causes:
- Mismatched indoor and outdoor unit pairing
- Indoor unit PCB fault or wrong model information
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 23 mean? (Multi-head systems; older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault)
The combination of indoor units connected is not one the outdoor unit supports.
Likely causes:
- Unsupported mix of indoor unit sizes on a multi-head outdoor unit
- Indoor unit swapped for an incompatible model
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 24 mean? (Multi-head systems and branch-box setups; older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault)
The system has detected the wrong number of indoor units or branch boxes connected.
Likely causes:
- An indoor unit or branch box is not powered or not communicating
- Wiring fault between units
- Set-up error during installation
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 32 mean? (Current splits, ducted, multi-head and cassette systems (varies by series); on older three phase ducted systems (ARTC-LCTU, AUTA54LCLU) 32 instead means an indoor unit number set-up error, and on J Series multi systems E:32 means an outdoor unit fault; older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault)
The main circuit board inside the indoor unit has failed or lost its stored settings.
Likely causes:
- Indoor unit main PCB failure
- EEPROM (stored model data) corruption, often after a power surge
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 39 mean? (Ducted systems (ARTG series) and larger wall splits (ASTG34LFCA and similar))
The circuit that drives the indoor fan motor has failed.
Likely causes:
- Fan motor drive circuit failure on the indoor PCB
- Fan motor fault overloading the circuit
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 41 mean? (Current splits, ducted, multi-head and cassette systems (varies by series))
The sensor that reads the room air temperature has failed.
Likely causes:
- Failed room air thermistor
- Loose sensor plug or damaged wiring
- Indoor PCB fault
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 42 mean? (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault)
The temperature sensor on the indoor coil (heat exchanger) has failed.
Likely causes:
- Failed indoor coil thermistor
- Loose sensor plug or damaged wiring
- Indoor PCB fault
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
What does Fujitsu General fault code 51 mean? (Current splits, ducted, multi-head and cassette systems (varies by series))
The indoor fan motor has failed or cannot spin properly.
Likely causes:
- Seized or failed indoor fan motor
- Fan blocked by an object or heavy dust build-up
- Fan motor drive circuit fault
Safe checks before you call:
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
- Clean the return air filters if they are visibly clogged
What does Fujitsu General fault code 53 mean? (Current splits, ducted, multi-head and cassette systems (varies by series); older AWT wall splits (AWT14/17LSAZ) use the same number for a different fault)
The system has detected a condensate drainage problem, usually water not draining away.
Likely causes:
- Blocked condensate drain line
- Failed drain pump (ducted and cassette units)
- Float switch stuck or faulty
Safe checks before you call:
- Look at the drain outlet where it exits the wall and clear any visible leaves or dirt at the opening
- Turn the system off at the isolator or breaker for 5 to 10 minutes, then restart
Fault confirmed? Here is what to do next
A fault code is the starting point, not the fix. Start here:
- Air conditioner repairs – how we diagnose and fix Fujitsu General faults across Adelaide. Our fault find covers the full diagnosis, and it is on us if you go ahead with the repair.
- Repair or replace calculator – whether fixing your current system is the smarter money.
- Service and maintenance – regular servicing prevents most of the faults on this page.
- Air conditioner fault code lookup – all 15 brands in one place.
- All calculators and tools
Call us on 08 8296 7888 or book online and we will call or text you back ASAP.
Sources for this page
Every Fujitsu General code above is checked against these Australian documents. Open them yourself to verify anything on this page:
- 6010619353 (assist.fujitsugeneral.com.au)
- fujitsu air conditioner error codes (valleyairconditioning.com.au)
- Fujitsu error codes (PDF) (arma.org.au)
- fujitsu error codes (fujitsuairconditioningperth.com.au)
- fujitsu error codes (aircaresolutionsnsw.com.au)
Fujitsu General fault code FAQs
Where do I find the fault code on a Fujitsu General air conditioner?
Check the remote or wall controller display first. Some models flash the indoor unit’s lamps in a pattern instead; the table above lists documented lamp patterns alongside their codes. If nothing is showing, the code may only appear while the fault is active.
Can I clear a Fujitsu General fault code myself?
You can reset the system by turning it off at the isolator or breaker for five minutes. If the code stays gone, it was a one-off. If it returns, the fault is real and needs a licensed technician, and repeated resets can cause further damage on compressor or refrigerant faults.
Does a Fujitsu General fault code mean I need a new air conditioner?
Usually not. Most codes point to repairable faults like sensors, fan motors or drainage. Our fault find gives you an honest verdict either way, and the fee is credited if you repair with us.
Are these Fujitsu General fault codes correct for Australian models?
Yes. Every code on this page was checked against Australian documentation (assist.fujitsugeneral.com.au, valleyairconditioning.com.au, arma.org.au), not overseas lists, because the same code can mean different things in different markets. Meanings still vary between model series, so treat this page as reference and cross-check your unit’s manual.
Written by Oliver Hastings, T&K Airpower. Last updated 01/08/2026. Compiled from Australian sources including assist.fujitsugeneral.com.au, valleyairconditioning.com.au, arma.org.au, fujitsuairconditioningperth.com.au, so you can check every code against the official documentation. Fault code meanings vary between model series and controllers, so treat this page as reference only and never remove panels or work on the refrigeration or electrical parts of the system yourself.
