Haier Unitary smart series Service Manual page 170

Failure code for wall mounted unit(AS182AVERA) ---- displayed on the indoor LCD:
Failure description
code
E1 Indoor room temperature sensor failure
E2 Indoor coil temperature sensor failure
E4 EEPROM wrong
E7 Communication failure between indoor and
outdoor
E14 Indoor fan motor failure
E18 Temperature cutoff protection
F1 Module failure
F2 Outdoor DC motor failure
F4 Compressor overheat
temperature protection
F5 Module over current / current transducer
failure
F6 Outdoor ambient temp. sensor abnormal
F7 Outdoor suction/defrosting temp. sensor
abnormal
F8 High pressure abnormal
F9 Low pressure abnormal
F10 No AC power supply
F11 Outdoor PCB EEPROM abnormal
F13 Communication failure between outdoor
PCB and module
F14 Compressor discharging temp. sensor
failure
F15 Compressor running faulty
F16 Running state-detecting circuit failure
Failure code for AP482AKEAA
No. Fault description
1 Indoor ambient temp. sensor failure
2 Indoor coil temp. sensor failure
3 Outdoor ambient temp. sensor failure
4 Outdoor coil temp. sensor failure
5 CT current failure
6 Pressure protection
7 Communication failure between indoor units and panel
8 Communication failure between indoor and outdoor PCB
Remark
Indoor room temp. sensor in short circuit, or open
circuit, it can resume due to the signal.
Indoor coil temp. sensor in short circuit, or open
circuit, it can resume due to the signal.
Being electrified to test E2 check sum, or E2 is
broken down.
Communication failure alarms for 4 minutes
contineously, it can resume due to the signal.
Indoor fan motor wrong wiring or indoor fan motor
abnormal.
Outdoor 4-way valve response abnormal.
Outdoor module abnormal
Outdoor DC motor abnormal
/ discharging Compressor discharging temperature over high
protection
Outdoor ambient temp. sensor in short current or
open circuit
Outdoor suction/defrosting temp. sensor in short
circuit or open circuit
High pressure too high
Low pressure abnormal
Being electrified to test if the E2 check sum is
correct or failure
Outdoor compressor discharging temp. sensor in
short circuit or open circuit
Resumable
Outdoor DC compressor running state-detecting
circuit failure, or compressor abnormal, resumable
a__
Operation panel display
E1
E2
E3
E4
E5
E6
E8
E9
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