Haier AV08NMSETA, Service Manual

Page: 58 / 88

56 56
LD indication
on master unit
Indication on
wired controller
(hex)
Failure code
definition
Failure description Remarks
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 HPSi failure
If disconnect for 50ms continuously,
alarm. If alarm 3 times in an hour,
confirm the failure.
Once confirmation,
un-resumable
33 33 EEPROM failure EEPROM failure.
Once confirmation,
un-resumable
34 34
Discharging temp.
too high protection
(Td)
Td≥115degree 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.
Once confirmation,
un-resumable
35 35
4-way valve
reversing 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≥0.6MPa, Otherwise, the
system alarms reversing failure.
Once confirmation,
un-resumable
36 36
Oil temp. too low
protection (Toil)
In normal operation, if Td<CT+6°Cfor
continuous 5 minutes, the unit
stops and alarms. 2 minutes and 50
seconds later, resume automatically.
If it occurs 3 times in an hour, confirm
the failure.
Once confirmation,
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, confirm the failure.
Once confirmation,
un-resumable
39-1 39-1
Compression ratio
too high protection
After compressor is running,
compression ratio ε<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.
Once confirmation,
un-resumable