Inverter Outdoor Unit Failure Code - Haier AU042FPERA Service Manual

15. Failure code

Inverter outdoor unit failure code

Digital tube Indication
indication on wired
on master controller
unit (hex)
Defrosting temp.
20 20-0
sensor Te failure
Ambient temp.
21 21
sensor Ta failure
Suction temp.
22 22
sensor Ts failure
Discharging temp.
23 23
sensor Td failure
26 26-0
Indoor
26-1 26-1
communication
failure
26-2 26-2
High pressure
28 28
sensor Pd failure
Low pressure
29 1D
sensor Ps failure
High pressure
30 30
switch HPS failure
33 33 EEPROM failure EEPROM failure
Discharging temp.
34 34 too high protection
(Td)
4-way valve
35 35
reversing failure
Low pressure
39-0 39-0 sensor Ps too low
protection
Failure code
Failure description
definition
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
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 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.
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.
41
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