Haier YR-H 71 Service Manual page 38

Press [check] button, ICR01 will show the diagnostic code, when unit * is in error, and choose the number in
ICR01, you will see the diagnostic code, and if not select the error units, the error units number will be
flashing.
Diagnostic code for outdoor master unit
20 Outdoor defrost temp. sensor TE error
21 Outdoor ambient temp. Sensor TA error
22 Outdoor suction temp. sensor TS error
24 Outdoor oil temp. sensor Toil error
23 Outdoor discharge temp. Sensor TD
error
25 Master compressor current is over high
26 Communication error between indoor
and outdoor unit
27 Compressor oil temp. is over-high
28 Master unit high pressure sensor error
Master unit low pressure sensor error
29
30 High pressure
over-high pressure
31 Low pressure
over-high pressure or over-low pressure
32 Inverter IPM problem
33 Master unit PCB MB89F538 EEPROM
error
34 Outdoor compressor discharge temp.
sensor alarms
The protection
35
compressor is acted
37 Master unit high/low pressure sensor is
installed in wrong turn
Master unit low pressure sensor alarms
39
40 High pressure sensor alarms
Suction temp. sensor TS alarm
41
42 Current over-high
The temp. tested from sensor is keeping lower than
-60.87
system will automatically change to backup running mode.
The temp. tested from sensor is keeping lower than
-4.45
system will automatically change to backup running mode.
Signal comes from MCU 840
Outdoor didn ¯t fi nd any i ndoo r un i
Oil temp. is keep higher than 90
temp. is lower than 75 , the alarm will be disappeared
automatically.
The signal voltage is higher than 4.9V, or lower than 0.1V
for 30 seconds
switch alarms for The switch keep open for 1 minute, alarm, if switch keep
short-connecting for over 1 minute, the alarm will be gone
automatically
switch alarms for
Signal comes from MCU 840
EEPROM data is lost or is installed in wrong way.
Discharge temp. sensor TD1 temperature is higher than
125
part in inverter Check the part in compressor.
In the first 3 minutes of compressor running, Pd/Ps<1 for
Cooling: Ps< 0.2kgG/cm
Heating: Ps <-0.2kgG/cm
Pd>28.5kgG/cm
TS>40
Signal is higher than setting Max. current for 5 seconds
or higher than 135.4
or higher than 337.14
for 10 seconds when lower than 100 , resume
over 60 seconds
2
2
2
for over 30 seconds
for over 10 minutes
38
for 60 seconds, and
for 60 seconds, and
for 5 minutes, when the
for 30 seconds, alarm
for over 10 minutes, alarm.