When your Fujitsu system stops and shows a code, that code is the system telling you roughly where the problem is. Roughly is the key word. A fault code points in a direction, it rarely names the exact fix. Find your system below, tap your code, and it will take you straight to what it means and what to do.
Before you try anything: the only DIY steps that are ever safe are switching the system off at the isolator (and waiting 20 to 30 minutes), cleaning or checking filters, checking the controller settings and batteries, and keeping the outdoor unit clear. Anything behind a panel, anything electrical, and anything involving refrigerant or gas is licensed work. If a code below says switch off and call, please take it at its word.
How to read the tables: 🟢 means there is a safe first step worth trying. 🟡 means book a service, the system needs a technician. 🔴 means switch the system off at the isolator and call us on (02) 4760 0100.
Systems with the Fujitsu hardwired (wired) remote controller – older ducted and commercial splits
Where the code shows: Wired remote controller LCD. The controller first shows EE:EE; hold the Energy Save and Zone Control buttons together for more than 3 seconds to reveal the underlying code (same button combo returns it to normal)..
| Code | What it means | What to do |
|---|---|---|
| E0:00 | The indoor unit and the wall controller have stopped talking to each other. Communications error, indoor unit to remote controller. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E1:00 | The indoor and outdoor units have stopped talking to each other. Communications error, indoor unit to outdoor unit. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E2:00 | The sensor that reads the air returning to the indoor unit has failed (open circuit). Return air thermistor open circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E3:00 | The sensor that reads the air returning to the indoor unit has failed (short circuit). Return air thermistor short circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E4:00 | The indoor coil's temperature sensor has failed (open circuit). Indoor coil thermistor open circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E5:00 | The indoor coil's temperature sensor has failed (short circuit). Indoor coil thermistor short circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E6:00 | The outdoor coil's temperature sensor has failed (open circuit). Outdoor coil thermistor open circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E7:00 | The outdoor coil's temperature sensor has failed (short circuit). Outdoor coil thermistor short circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| EA:00 | The sensor that reads the outside air temperature has failed (open circuit). Outdoor ambient thermistor open circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| Eb:00 | The sensor that reads the outside air temperature has failed (short circuit). Outdoor ambient thermistor short circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| Ec:00 | The sensor on the compressor's discharge pipe has failed (open circuit). Discharge pipe thermistor open circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| Ed:00 | The sensor on the compressor's discharge pipe has failed (short circuit). Discharge pipe thermistor short circuit. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| EE:00 | Refrigerant pressure in the system has gone too high and the unit has protected itself. High pressure problem. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EF:00 | The compressor's discharge pipe is running too hot, which usually points to the system being short of refrigerant gas. Discharge pipe temperature too high; source doc notes this typically means short of gas. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
Fujitsu VRF (V-II series compendium; Airstage family) – indoor unit faults
Where the code shows: Two-character code on the simple/wired remote controller (also shown on group/central/touch-panel controllers); indoor unit signals the same fault with Operation/Timer LED flash counts plus continuous Filter LED flashing; outdoor unit 7-segment display shows E.5U.1 for any indoor fault..
| Code | What it means | What to do |
|---|---|---|
| 12 | The indoor unit has lost contact with its wired remote controller. Remote controller communication error (also raised if the indoor controller PCB's communication circuit fails). Indoor LEDs: Operation 1 flash / Timer 2 flashes. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 14 | The indoor unit has dropped off the system's communication network – it hasn't heard from the outdoor unit for over 90 seconds. Network communication error. Indoor LEDs: Operation 1 flash / Timer 4 flashes (list) – detailed section shows 1/6. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 16 | Indoor units wired together in a group have stopped talking to each other. Indoor unit parallel communication error. Indoor LEDs: Operation 1 flash / Timer 6 flashes. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 31 | The indoor unit is unhappy with the frequency of its incoming power supply. Indoor unit power frequency abnormal. Indoor LEDs: Operation 3 flashes / Timer 1 flash. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 32 | The indoor unit's main circuit board has an internal fault (its stored settings can't be read properly). Indoor unit main PCB error – model information error or EEPROM access abnormal. Indoor LEDs: Operation 3 flashes / Timer 2 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 41 | The sensor that reads the room temperature has failed. Room temperature sensor error. Indoor LEDs: Operation 4 flashes / Timer 1 flash. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 42 | A temperature sensor on the indoor unit's coil has failed. Indoor heat exchanger sensor error – inlet or outlet thermistor open/shorted. Indoor LEDs: Operation 4 flashes / Timer 2 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 51 | The indoor unit's fan motor isn't spinning the way the controller expects. Indoor unit fan motor error – feedback speed at zero or stuck at 1/3 of target for over a minute. Indoor LEDs: Operation 5 flashes / Timer 1 flash. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 53 | The unit has detected a problem draining away condensate water. Water drain abnormal (float switch tripped). Indoor LEDs: Operation 5 flashes / Timer 3 flashes. |
🟡 Switch the unit off to stop more condensate being produced and book a service. If you can see water dripping from the unit or ceiling, leave it off. |
| 9U | The fault is on the outdoor unit side – the outdoor unit will show a more specific code. Outdoor unit error; check the outdoor unit's display code. Indoor LEDs: Operation 9 flashes / Timer 15 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
Fujitsu VRF (V-II series compendium; Airstage family) – outdoor unit faults
Where the code shows: Outdoor unit 7-segment display shows the full E.XX.Y code (via MODE/EXIT/SELECT/ENTER buttons on the outdoor PCB); remote and central controllers show the two-character short form; indoor units show Operation 9 flashes / Timer 15 flashes for outdoor faults..
Tap your code: —-E13.1E14.1E14.2E14.5E28.1E28.4E61.5E62.3E62.6E62.8E63.1E67.2E68.1E68.2E69.1E71.1E71.2E72.1E72.2E73.3E74.1E75.1E77.1E82.1E82.2E83.1E83.2E84.1E86.1E86.3E86.4E86.5E92.1E92.2E93.1E94.1E95.5E97.1E97.4E97.5E9U.2E5U.1EA1.1EA2.1EA3.1EA3.2EA4.1EA4.2EA4.3EA5.1EAC.4
| Code | What it means | What to do |
|---|---|---|
| —- | The outdoor unit hasn't finished its initial setup and has no valid settings to run with. Initial setting error; outdoor display stays blank/dashes, no code reaches the indoor units. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E13.1 | In a multi-outdoor-unit system, the outdoor units have stopped talking to each other. Communication error between outdoor units; remote shows 13. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E14.1 | The outdoor unit has lost network contact with an indoor unit it previously knew about (silent for 180+ seconds). Outdoor unit network communication 1 error; remote shows 14. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E14.2 | The outdoor unit's network communication has failed at the communication board. Outdoor unit network communication 2 error; remote shows 14. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E14.5 | The system found fewer indoor units on the network than it expects. Indoor unit number shortage error; no code shown on indoor side. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E28.1 | Automatic address setup failed – the outdoor unit couldn't assign addresses to the connected indoor units. Auto address setting error; remote shows 28. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E28.4 | Automatic address setup failed at a signal amplifier on the communication line. Signal amplifier auto address setting error; remote shows 28. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E61.5 | The three-phase power feeding the outdoor unit is wired in the wrong order, or one phase is missing. Outdoor unit reverse phase / missing phase wire error; remote shows 61. |
🟡 Book a service – this is a power supply wiring issue that needs an electrician or technician. If the fault appeared right after site electrical work or a blackout, mention that when you call. |
| E62.3 | The outdoor unit's circuit board can't read its own stored settings. Outdoor unit EEPROM access error; remote shows 62. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E62.6 | Two circuit boards inside the outdoor unit (main board and inverter) have stopped talking to each other. Inverter communication error; remote shows 62. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E62.8 | The settings stored on the outdoor unit's circuit board have become corrupted. Outdoor unit EEPROM data error; remote shows 62. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E63.1 | The inverter that drives the compressor has reported a fault. Inverter error; remote shows 63. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E67.2 | The inverter board detected a momentary dip or dropout in the power supply. Inverter PCB momentary power failure detection; remote shows 67. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E68.1 | A power relay inside the outdoor unit isn't switching properly. Magnetic relay error; remote shows 68. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E68.2 | A protective resistor that softens the power-on surge is overheating, and the unit has shut down to protect itself. Rush current limiting resistor temperature rise protection; remote shows 68. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E69.1 | The outdoor unit's communication board and main board have stopped talking to each other. Outdoor unit communication PCB parallel communication error; remote shows 69. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E71.1 | A sensor on the compressor's discharge pipe (circuit 1) has failed. Discharge temperature sensor 1 error; remote shows 71. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E71.2 | A sensor on the compressor's discharge pipe (circuit 2) has failed. Discharge temperature sensor 2 error; remote shows 71. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E72.1 | The temperature sensor on compressor 1 has failed. Compressor temperature sensor 1 error; remote shows 72. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E72.2 | The temperature sensor on compressor 2 has failed. Compressor temperature sensor 2 error; remote shows 72. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E73.3 | A temperature sensor on the outdoor coil's liquid line has failed. Outdoor unit heat exchanger liquid temperature sensor error; remote shows 73. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E74.1 | The sensor that reads the outside air temperature has failed. Outdoor temperature sensor open or shorted; remote shows 74. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E75.1 | The temperature sensor on the compressor's suction line has failed. Suction gas temperature sensor error; remote shows 75. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E77.1 | The temperature sensor on the inverter's heat sink has failed. Heat sink temperature sensor error; remote shows 77. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E82.1 | A temperature sensor at the sub-cooling heat exchanger's gas inlet has failed. Sub-cool heat exchanger gas inlet temperature sensor error; remote shows 82. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E82.2 | A temperature sensor at the sub-cooling heat exchanger's gas outlet has failed. Sub-cool heat exchanger gas outlet temperature sensor error; remote shows 82. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E83.1 | Liquid pipe temperature sensor 1 has failed. Liquid pipe temperature sensor 1 error; remote shows 83. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E83.2 | Liquid pipe temperature sensor 2 has failed. Liquid pipe temperature sensor 2 error; remote shows 83. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E84.1 | The sensor that measures compressor current has failed. Current sensor 1 error; remote shows 84. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E86.1 | The sensor that measures discharge (high side) refrigerant pressure has failed. Discharge pressure sensor error; remote shows 86. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E86.3 | The sensor that measures suction (low side) refrigerant pressure has failed. Suction pressure sensor error; remote shows 86. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E86.4 | High pressure safety switch 1 has tripped or failed. High pressure switch 1 error; remote shows 86. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E86.5 | High pressure safety switch 2 has tripped or failed. High pressure switch 2 error; remote shows 86. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E92.1 | Compressor 2 (the fixed-speed compressor) has a fault. Compressor 2 error, detected via its current sensor; remote shows 92. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E92.2 | Compressor 2 is drawing an abnormal amount of current. Compressor 2 current value error; remote shows 92. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E93.1 | The inverter compressor tried to start and couldn't. Inverter compressor start-up error; remote shows 93. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E94.1 | The compressor drive tripped on a sudden over-current. Trip detection; remote shows 94. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E95.5 | The compressor motor lost sync with its drive and stopped. Compressor motor loss of synchronization; remote shows 95. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| E97.1 | The outdoor unit's fan motor has jammed or isn't turning. Outdoor unit fan motor lock error; remote shows 97. |
🟡 Make sure nothing is jammed in or leaning against the outdoor unit and that leaves or debris aren't blocking the fan, then try a power-cycle at the isolator. If the code returns, book a service. |
| E97.4 | The outdoor fan motor's supply voltage has dropped too low. Outdoor unit fan motor undervoltage; remote shows 97. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E97.5 | The outdoor unit's fan motor is running too hot. Outdoor unit fan motor temperature abnormal; remote shows 97. |
🟡 Check that the outdoor unit has clear space around it and nothing is blocking airflow, then book a service if the code returns after a power-cycle. |
| E9U.2 | In a multi-outdoor-unit system, one of the secondary (slave) outdoor units has reported a fault. Slave unit error; remote shows 9U. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E5U.1 | One of the indoor units has a fault – the indoor unit or its controller will show the specific code. Indoor unit error shown on the outdoor unit's display; press ENTER (long) on the outdoor PCB to see which indoor address. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| EA1.1 | Compressor circuit 1 is discharging refrigerant at a dangerously high temperature – often a sign the system is short of refrigerant. Discharge temperature 1 abnormal; remote shows A1. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA2.1 | Compressor circuit 2 is discharging refrigerant at a dangerously high temperature – often a sign the system is short of refrigerant. Discharge temperature 2 abnormal; remote shows A2. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA3.1 | Compressor 1 itself is running too hot. Compressor 1 temperature abnormal; remote shows A3. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA3.2 | Compressor 2 itself is running too hot. Compressor 2 temperature abnormal; remote shows A3. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA4.1 | Refrigerant pressure on the high side has gone beyond safe limits. High pressure abnormal; remote shows A4. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA4.2 | The unit has shut down to protect itself from high refrigerant pressure (protection stage 1). High pressure protection 1; remote shows A4. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA4.3 | The unit has shut down to protect itself from high refrigerant pressure (protection stage 2). High pressure protection 2; remote shows A4. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EA5.1 | Refrigerant pressure on the low side has dropped too far – commonly a sign of refrigerant loss. Low pressure abnormal; remote shows A5. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| EAC.4 | The inverter's heat sink is running too hot – often an airflow or cooling problem at the outdoor unit. Heat sink temperature abnormal; remote shows AC. |
🟡 Check the outdoor unit has clear space around it and its coil isn't clogged with leaves or debris, then book a service – the electronics are overheating. |
Lifestyle inverter wall-mounted range (ASTG-LVCA / ASTG-LFCA and related, approx. 2010s onward)
Where the code shows: Indoor unit lamps: the Operation lamp flashes X times, then the Timer lamp flashes Y times, repeating in a cycle while the Economy lamp flashes continuously. Codes below are written as Operation flashes / Timer flashes. Systems fitted with a wired remote controller also show a matching two-digit code after 'Er' (Operation count = first digit, Timer count = second digit; 10 flashes displays as the letter A)..
Tap your code: 1/11/21/52/12/22/32/43/13/23/53/94/14/25/15/35/95/156/26/36/46/56/107/17/27/37/47/57/67/78/28/38/48/69/49/59/79/89/910/110/310/513/2
| Code | What it means | What to do |
|---|---|---|
| 1/1 | The indoor and outdoor units have stopped talking to each other. Serial communication error. Wired remote shows 11. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 1/2 | The indoor unit has lost contact with its wired remote controller (where one is fitted). Wired remote controller communication error. Wired remote shows 12. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 1/5 | The installer's commissioning test run was never completed on this system. Check run unfinished. |
🟡 Book a service or call your installer – the system needs its commissioning run completed by a technician. |
| 2/1 | The pipework and cabling between the indoor and outdoor units don't match what the system expects. Number of wires and pipes error – connection configuration fault. |
🟡 Book a service – this points to how the system was configured rather than anything you can fix from the controls. If the system was recently installed, call the installer. |
| 2/2 | The indoor unit's capacity doesn't match what the outdoor unit expects. Indoor unit capacity error. Wired remote shows 22. |
🟡 Book a service – this points to how the system was configured rather than anything you can fix from the controls. If the system was recently installed, call the installer. |
| 2/3 | The indoor and outdoor units are a combination the system doesn't recognise as valid. Connected combination error. |
🟡 Book a service – this points to how the system was configured rather than anything you can fix from the controls. If the system was recently installed, call the installer. |
| 2/4 | The system found a different number of indoor units or branch boxes than it expects. Number of indoor units / number of branch boxes error (multi and branch-box configurations). |
🟡 Book a service – this points to how the system was configured rather than anything you can fix from the controls. If the system was recently installed, call the installer. |
| 3/1 | The unit detected an interruption to its power supply. Power supply interruption error. Wired remote shows 31. Listed on the ASTG34LFCA page. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – this fault is often left over from a blackout or brownout. If the code comes back, book a service. |
| 3/2 | The indoor unit's main circuit board has an internal fault (its stored settings can't be read properly). Indoor unit model information error / EEPROM access abnormal. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 3/5 | The manual start button on the indoor unit itself is stuck or its circuit has failed. Manual auto switch error. Wired remote shows 35. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 3/9 | The circuit that drives the indoor fan motor has failed. Fan motor driving circuit error. Wired remote shows 39. Listed on the ASTG34LFCA page. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4/1 | The sensor that reads the room temperature has failed. Indoor room thermistor (inlet air temperature sensor) error. Wired remote shows 41. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4/2 | A temperature sensor on the indoor unit's coil has failed. Indoor heat exchanger (middle) thermistor error. Wired remote shows 42. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 5/1 | The indoor unit's fan motor isn't running the way the controller expects. Indoor unit fan motor (1) error. Wired remote shows 51. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 5/3 | The unit has detected a problem draining away condensate water. Drainage error. Wired remote shows 53. Corroborated by airturners.com.au Fujitsu error code guide. |
🟡 Switch the unit off to stop more condensate being produced and book a service. If you can see water dripping from the unit or down the wall, leave it off. |
| 5/9 | The indoor unit's second fan motor isn't running properly (models with two fans). Indoor unit fan motor 2 error. Wired remote shows 59. Listed on the ASTG34LFCA page. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 5/15 | The indoor unit has reported a general fault without a more specific code. Indoor unit error. Wired remote shows 5U. Listed on the ASTG34LFCA page. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6/2 | The outdoor unit's circuit board can't read its own stored model settings. Outdoor unit model information error. Wired remote shows 62. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6/3 | The inverter that drives the compressor has reported a fault. Inverter error. Wired remote shows 63. Corroborated by airturners.com.au Fujitsu error code guide. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6/4 | A power-conditioning circuit in the outdoor unit (active filter) has a voltage problem. Active filter error / A.F. voltage error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6/5 | The power module that drives the compressor has reported a fault. IPM (intelligent power module) error. Wired remote shows 65. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6/10 | The indoor unit's display board and main board have stopped talking to each other. Display PCB communication error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/1 | The sensor on the compressor's discharge pipe has failed. Discharge thermistor error. Wired remote shows 71. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/2 | The temperature sensor on the compressor body has failed. Compressor thermistor error. Wired remote shows 72. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/3 | A temperature sensor on the outdoor coil's liquid line has failed. Heat exchanger liquid outlet thermistor error. Wired remote shows 73 (the ASTG34LFCA page labels 73 as heat exchanger centre / liquid outlet temperature sensor error). |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/4 | The sensor that reads the outside air temperature has failed. Outdoor thermistor error. Wired remote shows 74. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/5 | The temperature sensor on the compressor's suction line has failed. Suction gas thermistor error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/6 | A temperature sensor on one of the outdoor unit's valves has failed. Valve thermistor error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/7 | The temperature sensor on the inverter's heat sink has failed. Heat sink thermistor error. Wired remote shows 77. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 8/2 | A temperature sensor at the sub-cooling heat exchanger has failed. Sub-cool heat exchanger gas inlet / gas outlet thermistor error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 8/3 | A temperature sensor on the liquid refrigerant pipe has failed. Liquid pipe thermistor error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 8/4 | The sensor that measures compressor current has failed. Current sensor error. Wired remote shows 84. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 8/6 | A refrigerant pressure sensor has failed or the high pressure safety switch has tripped. Discharge pressure sensor / suction pressure sensor / high pressure switch error. Wired remote shows 86. The source table bundles sensor and safety-switch faults into one code, so the safer red lane is used. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 9/4 | The compressor drive tripped on a sudden over-current. Over current error. Wired remote shows 94. Corroborated by airturners.com.au Fujitsu error code guide. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 9/5 | The outdoor unit can't control the compressor properly. Compressor control error. Wired remote shows 95. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 9/7 | The outdoor unit's fan motor isn't running the way the controller expects. Outdoor unit fan motor (1) error. Wired remote shows 97. |
🟡 Make sure nothing is jammed in or leaning against the outdoor unit and that leaves or debris aren't blocking the fan, then try a power-cycle at the isolator. If the code returns, book a service. |
| 9/8 | The outdoor unit's second fan motor isn't running properly (models with two fans). Outdoor unit fan motor 2 error. Wired remote shows 98. Listed on the ASTG34LFCA page. |
🟡 Make sure nothing is jammed in or leaning against the outdoor unit and that leaves or debris aren't blocking the fan, then try a power-cycle at the isolator. If the code returns, book a service. |
| 9/9 | The valve that switches the system between heating and cooling has a fault. 4-way (reversing) valve error. Wired remote shows 99. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 10/1 | The compressor is discharging refrigerant at a dangerously high temperature – often a sign the system is short of refrigerant. Discharge temperature error. Wired remote shows A1. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 10/3 | The compressor itself is running too hot. Compressor temperature error. Wired remote shows A3. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 10/5 | Refrigerant pressure on the low side has dropped too far – commonly a sign of refrigerant loss. Low pressure error. Wired remote shows A5. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 13/2 | A branch box connecting multiple indoor units has a fault (branch-box multi systems only). Branch boxes error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
Classic inverter wall-mounted splits (ASTA-JCC / ASTA-LCC era, mid-2000s)
Where the code shows: Indoor unit lamps: the Operation LED flash count gives the fault family and the Timer LED flash count gives the specific fault, written below as Operation flashes / Timer flashes. For serial signal errors ('-' rows) the Operation LED is not flash-counting – it stays in its normal state (ASTA-JCC) or off (ASTA-LCC) while only the Timer LED flashes..
| Code | What it means | What to do |
|---|---|---|
| -/2 | The indoor and outdoor units failed to establish contact when the system tried to start. Serial signal (reverse) error immediately after start of operation. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| -/3 | The indoor and outdoor units lost contact while the system was running. Serial signal (reverse) error during operation. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| -/4 | The outdoor unit failed to hear from the indoor unit when the system tried to start. Serial signal (forward) error immediately after start of operation. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| -/5 | The outdoor unit stopped hearing from the indoor unit while the system was running. Serial signal (forward) error during operation. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 2/2 | The sensor that reads the room temperature has failed (open or short circuit). Indoor temperature thermistor open / short. Corroborated by airturners.com.au Fujitsu error code guide. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 2/3 | A temperature sensor on the indoor unit's coil has failed (open or short circuit). Heat exchanger middle thermistor open / short. Corroborated by airturners.com.au Fujitsu error code guide. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 3/2 | The sensor on the compressor's discharge pipe has failed (open or short circuit). Discharge thermistor open / short. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 3/3 | The outdoor coil's temperature sensor has failed (open circuit). Outdoor heat exchanger thermistor open. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 3/4 | The sensor that reads the outside air temperature has failed (open or short circuit). Outdoor temperature thermistor open / short. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4/2 | The manual start button's circuit on the indoor unit has jammed closed. Forced automatic switch welded. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4/3 | The main power relay inside the indoor unit has stuck closed. Main relay welded. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4/4 | The unit detected an interruption to its power supply. Power interruption error. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – this fault is often left over from a blackout or brownout. If the code comes back, book a service. |
| 4/7 | An internal power-supply protection on the indoor board has shut the unit down. VDD permanent stop protection. The ASTA07/09JCC page prints a '?' beside this row; the ASTA09LCC page lists it cleanly. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4/8 | An internal power-supply protection on the indoor board has shut the unit down (reverse VDD). Reverse VDD permanent stop protection. Listed for ASTA09LCC only. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 5/2 | The outdoor unit tripped on a sudden over-current. Current trip error. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 5/3 | The outdoor unit's current-measuring circuit isn't reading properly. CT (current transformer) abnormal. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 5/5 | The compressor drive can't detect the compressor motor's position. Compressor location detection error. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 5/6 | The circuit that drives the outdoor fan motor has a fault. Outdoor unit fan drive system abnormal. |
🟡 Make sure nothing is jammed in or leaning against the outdoor unit and that leaves or debris aren't blocking the fan, then try a power-cycle at the isolator. If the code returns, book a service. |
| 6/2 | The indoor unit's fan motor has jammed or isn't turning. Indoor fan motor abnormal lock. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6/3 | The indoor unit's fan motor isn't spinning at the speed the controller expects. Indoor fan motor abnormal rotation. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7/2 | The compressor's discharge pipe is running too hot, which usually points to the system being short of refrigerant gas. Discharge temperature abnormal. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 7/3 | Refrigerant pressure has risen too high while cooling and the unit has protected itself. Cooling high pressure abnormal rise. |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 8/4 | A power-conditioning circuit in the outdoor unit has failed. PFC (power factor correction) circuit error. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| ALL BLINK | The unit's circuit board doesn't recognise the model it's fitted to. Model error – on ASTA07/09JCC the Operation and Timer LEDs blink; on ASTA09LCC all LEDs (operation, timer, super quiet, coil dry) blink simultaneously. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
Early non-inverter wall-mounted splits (AST-PSA series, late 1990s-2000s)
Where the code shows: Indoor unit lamps: the Operation lamp (red) flashes slowly a set number of times (0.5 sec flashes, then a 5 sec pause) while the Timer lamp flickers rapidly (0.1 sec on/off). For serial faults the Operation lamp stays on while the Timer lamp blinks steadily. A second display mode (Operation flickering rapidly, Timer flashing in 0.5 sec counts) gives the technician sub-code..
Tap your code: ON + Timer flashing2 flashes3 flashes4 flashes5 flashes6 flashes7 flashes8 flashesBoth lamps flash together
| Code | What it means | What to do |
|---|---|---|
| ON + Timer flashing | The indoor and outdoor units have stopped talking to each other. Serial signal abnormal (indoor unit to outdoor unit). Operation lamp stays on, Timer lamp blinks steadily (0.5 sec on/off). |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| 2 flashes | A temperature sensor in the indoor unit (room or pipe sensor) has failed. Indoor thermistor abnormal – piping or room temperature thermistor, open or short. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 3 flashes | A temperature sensor on the outdoor unit has failed. Outdoor unit thermistor abnormal – discharge, heat exchange or outside air temperature thermistor. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 4 flashes | The indoor unit's electronics have a fault. Indoor unit control unit parts abnormal (sub-codes cover manual auto switch fused, main relay fused, power interrupt faulty). |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 5 flashes | The outdoor unit's electronics have a fault. Outdoor unit control unit parts abnormal (sub-codes cover current trip and CT abnormal). |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 6 flashes | The indoor unit's fan motor has jammed or isn't running at the right speed. Indoor fan motor abnormal – locked, speed abnormal, starting failure, overcurrent or supply voltage abnormal. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| 7 flashes | Something is wrong in the refrigerant circuit – the compressor is running too hot, which usually points to the system being short of gas. Refrigerant cycle abnormal (discharge temperature abnormal: insufficient gas etc.; sub-codes cover cooling pressure over-rise, intake blocking and heating fan stop protection). |
🔴 Switch the system off at the isolator and call us. Keeping it running with this fault risks further damage. |
| 8 flashes | A power-conditioning circuit in the unit has failed. Active filter abnormal – parts abnormal, voltage feedback connector pulled etc. Listed for AST13PSA-W. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| Both lamps flash together | Both lamps flashing together once a second is the test-operation display, not a fault. Test operation display (Operation and Timer lamps flash simultaneously, 1.0 sec on/off). |
🟢 Nothing is wrong if a technician is testing the unit. If this shows in normal use, power-cycle at the isolator (off, wait 20-30 minutes, back on) and book a service if it won't clear. |
J Series multi-split indoor units (wall-mounted heads on J Series multi outdoor units)
Where the code shows: E:XX code on the wired or simple remote controller (where fitted); the indoor unit signals the same fault with flash combinations of the Operation, Timer and third (Swing) indicators – rapid flicker means 0.1 sec on/off. Outdoor unit faults also show on LEDs on the outdoor PCB (technician access only, not extracted)..
| Code | What it means | What to do |
|---|---|---|
| E:02 | The indoor unit's circuit board doesn't recognise its own model settings. Model information abnormal. Indoor lamps: Operation and Timer flicker rapidly (0.1 sec on/off). |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:03 | The indoor unit's main processor has an internal fault. Microcomputer error. Indoor lamps: Operation 5 flashes / Timer rapid flicker / third lamp 2 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:04 | The incoming mains power frequency is outside what the unit expects. Power supply frequency abnormal. Indoor lamps: Operation, Timer and third lamp all flicker rapidly. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:06 | The indoor unit's circuit board can't read its own stored settings. EEPROM access error. Indoor lamps: Operation rapid flicker / Timer 4 flashes / third lamp 1 flash. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:07 | The settings stored on the indoor unit's circuit board have been corrupted or erased. EEPROM deletion error. Indoor lamps: Operation rapid flicker / Timer 4 flashes / third lamp 2 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:09 | The sensor that reads the room temperature has failed. Room temperature thermistor error. Indoor lamps: Operation 2 flashes / Timer rapid flicker. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:0A | A temperature sensor on the indoor unit's coil (middle) has failed. Indoor unit heat exchanger thermistor (middle) error. Indoor lamps: Operation 3 flashes / Timer rapid flicker / third lamp 2 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:0b | A temperature sensor on the indoor unit's coil (inlet) has failed. Indoor unit heat exchanger thermistor (inlet) error. Indoor lamps: Operation 3 flashes / Timer rapid flicker / third lamp 1 flash. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:11 | The unit has detected a problem draining away condensate water. Drain abnormal. Indoor lamps: Operation 4 flashes / Timer rapid flicker. |
🟡 Switch the unit off to stop more condensate being produced and book a service. If you can see water dripping from the unit or down the wall, leave it off. |
| E:13 | The indoor unit's fan isn't running the way the controller expects. Indoor unit fan error. Indoor lamps: Operation 6 flashes / Timer rapid flicker. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
| E:18 | The indoor unit has lost contact with its wired or simple remote controller. Communication error 1 or 2 (indoor unit to wired/simple remote controller). Indoor lamps: Operation 5 flashes / Timer rapid flicker / third lamp 1 flash (error 1) or 4 flashes (error 2). |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E:1F | Signals between the system's circuit boards aren't getting through. Transmission error. Indoor lamps: Operation rapid flicker / Timer 5 flashes / third lamp 1 flash. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E:21 | Indoor units wired together have stopped talking to each other. Parallel communication error. Indoor lamps: Operation rapid flicker / Timer 6 flashes. |
🟢 Turn the system off at the electrical isolator, wait 20-30 minutes, then turn it back on – communication errors like this often clear after a power interruption. If the code comes back, book a service. |
| E:32 | The fault is on the outdoor unit side. Outdoor unit error. Indoor lamps: Operation rapid flicker / Timer 3 flashes / third lamp 3 flashes. |
🟡 Try a power-cycle at the isolator (off, wait 20-30 minutes, back on). If the code returns, book a service – this one needs a technician. |
Code still showing after a reset? Mention the code and your system type when you book and our office can line up the right technician and likely parts before we arrive.
Book a service or call (02) 4760 0100 (24-hour line, Penrith & Blue Mountains).
Codes vary between models and generations, and manufacturers revise them. This guide is compiled from official service documentation and checked by Ample Air, but it is general information, not a diagnosis. Refrigerant and electrical work must be carried out by licensed technicians. Ample Air, ARC licences AU12976 & AU15788. Last verified August 2026.