Failure Code - Haier AU07NFPEUA Installation Manual

Failure code

Inverter outdoor unit failure code
Digital tube
indication Failure code
on master definition
unit
Defrosting temp.
20
sensor Te failure
Defrosting temp.
20
sensor Tc failure
Ambient temp.
21
sensor Ta failure
Suction temp.
22
sensor Ts failure
Discharging temp.
23
sensor Td failure
26
Indoor
26-1
communication
failure
26-2
High pressure
28
sensor Pd failure
Low pressure
29
sensor Ps failure
High pressure
30
switch HPS failure
33 EEPROM failure
Discharging temp.
34 too high protection
(Td)
4-way valve
35
reversing failure
Low pressure
39-0 sensor Ps too low
protection
Compression ratio
39-1
too high protection
Compression ratio
39-2
too low protection
Failure description
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
AD value is below 11(open circuit) or over 1012(short circuit) for
60seconds, in defrosting and within 3 minutes after defrosting, no alarm
AD value is below 11(open circuit) or over 1012(short circuit) for
60seconds, in defrosting and within 3 minutes after defrosting, no alarm
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
For continuous 200 cycles, can not find connected indoors
For continuous 300seconds, the searched indoor quantity is less than
the set quantity.
For continuous 300seconds, the searched indoor quantity is more than
the set quantity.
AD value is below 11(open circuit) or
over 1012(short circuit) for 30seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
AD value is below 11(open circuit) or
over 1012(short circuit) for 30seconds,
in defrosting and within 3 minutes after
defrosting, no alarm
If disconnect for 50ms continuously, alarm. If alarm 3 times in an hour,
confirm the failure
EEPROM failure
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, confirm the failure.
After 4-way valve is electrified 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.
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, confirm the failure.
After compressor is running, compression ratio 8. for continuous 5
minutes stop and alarm.2 minutes and 50 seconds later, resume
automatically, if it occurs 3 times in an hour, confirm the failure.
In normal operation, compression ratio <1.8 for continuous 5 minutes
stop and alarm.2 minutes and 1 seconds later,
resume automatically, if it occurs 3 times in an hour, confirm the failure.
20
Remarks
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable
Once
confirmation,
un-resumable