Haier AB092FCAHA, Service Manual

Page: 75 / 174

10.2 AU48-
diagnostic information and trouble shooting
The failure code is displayed on the outdoor PCB; please diagnose the trouble according to the following code:
Failure
code
Failure position Judgment measure
01 Outdoor defrosting temp.
sensor TE circuit
Examine the sensor below 20H in cut circuit or over
1000H in short circuit for continuous 60 seconds,
recoverable
02 Ambient temp. sensor TA
circuit Examine the sensor below 20H in cut circuit or over
1000H in short circuit for continuous 60 seconds,
recoverable
03 Suction temp. sensor TS
circuit Examine the sensor below 20H in cut circuit or over
1000H in short circuit for continuous 60 seconds,
recoverable
04 Discharge temp. sensor TD
circuit Examine the sensor below 20H in cut circuit or over
1000H in short circuit for continuous 60 seconds after
compressor working for 3 minutes, recoverable
05 Outdoor mid-condenser temp.
sensor Examine the sensor below 20H in cut circuit or over
1000H in short circuit for continuous 60 seconds,
recoverable
06 Over current Alarm over current failure, on exceeding current
protection value C for 5 seconds. After occurrence 3
times in 30 minutes, failure code displays on the LED,
unrecoverable
07 Current mutual inductance
circuit After closing compressor, the current of current
mutual inductance is checked over 15A. when
starting up the compressor, frequency is over 60HZ,
and current is below 5A, recoverable
08 Inverter compressor built-in
over-load protection circuit Inverter compressor built-in over-load protector acts.
09 IPM protection IPM over current 、 short current 、 temp. too high 、 lack
of pressure protect alarm 3 times continuously in 30
minutes, unrecoverable
10 EEPROM on PCB faulty 857 reads and writes the data of EEPROM faulty,
flashes 11 times, unrecoverable
11 Discharge temp. sensor
protection acts (TD) Examine TD1 sensor alarms compressor off after 5
seconds at over 120
℃
, confirming 3 times in
30minutes, and displaying 11 on the LED,
unrecoverable
12 Pressure sensor
（
Pd
、
Ps
）
wiring faulty
After compressor starting up 3 minutes, examine
compressor rate(Pd/Ps) is below 0.9 for continuous
60 seconds, recoverable
13 Pressure switch circuit High pressure switch acts, trouble disappears after 2