Haier AU042FPERA Service Manual page 45

Digital tube Indication
indication on wired Failure code
on master controller definition
unit (hex)
Valve plate
module
62 62
error(sending by
valve plate)
Valve plate dial
63 63
setting error
CT current is too
64 64
high
Upper DC motor
71-0 71-0
blocked
Lower DC motor
71-1 71-1
blocked
No pressure drop
between high
75 75-0
pressure and low
pressure
Too small pressure
drop between high
75-4 75-4
pressure and low
pressure
78 78 Lack of refrigerant
IPM modular
81 81 temp. too high
protection
Compressor
82 82
current protection
Outdoor model set
83 83
error
Transient over
current in IPM
108 108
module rectifier
side software
Current detection
109 109
circuit abnormality
Failure description
Reserved
No valve plate module dial but the valve plate module is detected.
CT current exceeds specified value, 3 minutes after recovery
Running at speed below 20rpm for 30s, or at speed of 70% lower
than the target for 2 minutes, 2 minutes and 50 seconds later after
stop, resume automatically. It occurs 3 times in an hour, confirm
the failure.
In 1 minute after INV compressor starts up, Pd-Ps≤0.1MPa,then
stop. 180 seconds later, resume automatically. If it occurs 3 times
in an hour, confirm the failure.
If Pd-Ps≤0.2MPa for 5 minutes, the outdoor unit protection stop.
• 3 minutes after stopping protection, restart. If it occurs 3 times in
an hour, confirm the failure.
Compressor running in cooling mode, Ps<0.2MPa for 30 minutes;
compressor running in heating mode, Tsi - ET>20;
LEV will fully open for 60 minutes, the unit will output lack of
refrigerant alarm, unit will not stop.
IPM modular temp.≥185°F(85°C)
Compressor current exceeds specified value, 3 minutes after
recovery
Model and the number of fans do not match
Transient over current in IPM module rectifier side software
Current detection circuit abnormality
43
Remarks
Resumable
Once
confirmation,
un-resumable
3 times in an
hour, confirm
failure; once
confirmation, un-
resumable
Once
confirmation, un-
resumable
Once
confirmed,
unresumable
Once
confirmed,
unresumable
--
3 times in an
hour, confirm
failure; once
confirmation, un-
resumable
3 times in an
hour, confirm
failure; once
confirmation, un-
resumable
Un-resumable
3 times in an
hour, confirm
failure; once
confirmation, un-
resumable
3 times in an
hour, confirm
failure; once
confirmation, un-
resumable