Model reference
Haier AS18BS4HRA
Air Conditioner
1 document21 error codes9 service modes
Available documentation
Service Manual
- SERVICE MANUAL Wall Mounted Type DC Inverter FREE MATCH N-Series65 pg
MyPros+ Max
Diagnose your Haier AS18BS4HRA.
- Step-by-step diagnostics from the service manual
- Test values, resistance specs, and wiring references
- Verified part numbers when replacement is needed
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Error codes (21)
CodeMeaning
E1Room temperature sensor failure.E14Indoor fan motor malfunction (rotation feedback signal not received in 2…E2Heat-exchange sensor failure.E4Indoor EEPROM error.E7Communication fault between indoor and outdoor units.E9High work-intense protection (outdoor LED1 flash 21 times).F1IPM (Intelligent Power Module) protection (outdoor LED1 flash 2 times).F11Compressor deviates from normal / loss of synchronism detection (outdoor LED1…F12Outdoor EEPROM error (outdoor LED1 flash 1 time).F19Power voltage is too high or too low (outdoor LED1 flash 6 times).F2Overcurrent of the compressor (outdoor LED1 flash 24 times).F21Defrost temperature sensor failure (outdoor LED1 flash 10 times).F22Overcurrent protection of AC electricity for the outdoor model (outdoor LED1…F23Overcurrent protection for single-phase of the compressor (outdoor LED1 flash…F25Discharge temperature sensor failure (outdoor LED1 flash 13 times).F28Loop of the station detect error (outdoor LED1 flash 19 times).F3Communication fault between the IPM and outdoor PCB (outdoor LED1 flash 4…F4Overheat protection for discharge temperature (outdoor LED1 flash 8 times).F6Ambient temperature sensor failure (outdoor LED1 flash 12 times).F7Suction temperature sensor failure (outdoor LED1 flash 11 times).F8Outdoor DC fan motor fault (outdoor LED1 flash 9 times).Service modes (9)
- Emergency OperationPress the emergency operation switch once; a 'Pi' sound is heard. The unit will run automatically
- Fixed Frequency CoolingUnder G code condition
- Fixed Frequency HeatingUnder G code condition
- Malfunction List ResumeUnder the system off mode, press and hold the emergency key for 10 to 15 seconds
- Power Cut Compensation ModePress the sleep (dormant) button 10 times within 7 seconds
- Single Indoor System OperationFirst, set the high speed airflow and 30°C set temperature, then press the dormant (sleep) key 6…
- Test OperationWith the system in off mode, press and hold the emergency switch (same as test operation switch)…
- Test ProgramConnect the test program terminal on the mainboard, then connect the system to the power circuit
- Time Cutting Function (60x Speed)Connect the test program terminal on the mainboard after connecting the system to the power circuit.
Full entry steps, exit procedures, and test sequences are available in Max.
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