Haier AU05IFPERA - 15. Failure Code; 15.1 Outdoor Unit Failure Code Definitions

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15. Failure code
Inverter outdoor unit failure code
Digital tube
indication
on master
unit
Indication
on wired
controller
(hex)
Failure code
denition
Failure description Remarks
20 20-0
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
21 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 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 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 26-0
Indoor
communication
failure
For continuous 200 cycles, can not nd connected indoors
Resumable
26-1 26-1
For continuous 300seconds, the searched indoor quantity is less
than the set quantity.
26-2 26-2
For continuous 300seconds, the searched indoor quantity is more
than the set quantity.
28 28
High pressure
sensor Pd failure
AD value is below 11(open circuit) or
over 1012(short circuit) for 30seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
29 1D
Low pressure
sensor Ps failure
AD value is below 11(open circuit) or
over 1012(short circuit) for 30seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
Resumable
30 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 33 EEPROM failure EEPROM failure
Once
conrmation,
un-resumable
34 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 35
4-way valve
reversing failure
After 4-way valve is electried for 3 minutes, if the below conditions
can be met for continuous 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
39-0 39-0
Low pressure
sensor Ps too low
protection
After compressor is running (except for residual operation), if
in cooling, Ps<0.05Mpa; in heating, Ps<0.03Mpa; in oil return,
Ps<0.03Mpa for continuous 5 minutes, alarm and stop. 2 minutes
and 50 seconds later, resume automatically,
if it occurs 3 times in an hour, conrm the failure.
Once
conrmation,
un-resumable