Haier AU052FNERA - Failure code; Inverter outdoor unit failure code

19
Failure code
Inverter outdoor unit failure code
Digital tube
indication on
master unit
Failure code denition Failure description Remarks
20
Defrosting temp.sensor Te
failure
AD value is below 11(open circuit) or over 1012(short circuit)
for 60seconds, in cooling mode, if the sensor is abnormal,
the unit does not deal with it, besides, in defrosting and
within 3 minutes after defrosting, no alarm
Resumable
20-1
Defrosting temp.sensor Tc
failure
21
Ambient temp.sensor Ta
failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 60seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
22 Suction temp.sensor Ts failure
AD value is below 11(open circuit) or over 1012(short
circuit) for 60seconds, in defrosting and within 3 minutes
after defrosting, no alarm
Resumable
23
Discharging temp.sensor Td
failure
After compressor is running for 5 minutes, AD value is below
11(open circuit) or over 1012(short circuit) for 60seconds,
in course of startup, defrosting and within 3 minutes after
defrosting, no alarm
Resumable
26
Indoor communication failure
For continuous 200 cycles, can not nd connected indoors
Resumable
26-1
For continuous 300seconds, the searched indoor quantity is
less than the set quantity.
26-2
For continuous 300seconds, the searched indoor quantity is
more than the set quantity.
30
High pressure switch HPS
failure
If disconnect for 50ms continuously, alarm. If alarm 3 times
in an hour, conrm the failure
Once
conrmation,
un-resumable
33 EEPROM failure EEPROM failure
Once
conrmation,
un-resumable
34
Discharging temp.too high
protection (Td)
Td≥239°F(115°C) at interval of 25msec for twice
continuously, and over the set value, then stop and alarm;
3 minutes later, resume automatically. If it occurs 3 times in
an hour, conrm the failure.
Once
conrmation,
un-resumable
35 4-way valve reversing failure
After 4-way valve is electried for 3 minutes, if the below
conditions can be met for continous 10 seconds, that is
conversing successfully:
1. this outdoor compressor is running normally
2. Pd-Ps≥87PSI(0.6MPa), Otherwise, the system alarms
reversing failure.
Once
conrmation,
un-resumable
43
Discharging temp. sensor Td
too low protection
In normal operation, if Td<CT+50°F
(10
) for continuous 5 minutes, the unit stops and alarms.2
minutes and 50 seconds later, resume automatically. If it
occurs 3 times in an hour, conrm the failure. After xed
frequency compressor alarms, inverter compressor will
continue to run. If xed frequency compressor has been
locked for 3 times, the unit will stop and alarm.
Once
conrmation,
un-resumable
46
Communication with inverter
board failure
No communication within 30 seconds continuously Resumable
49
Low pressure
switch LPS failure
If disconnect for 50ms continuously,alarm.If alarm 3 times in
an hour,conrm the failure
Once
conrmation,
un-resumable