Haier Unitary smart series Service Manual page 171

Failure code for AP422ACEAA
Central
Number
Panel
-ized
of
display
control
flashes
readout
1 01D E1
2 02D E2
3 11D E3
4 12D E4
5 10D E5
6 14D E6
9 05D E9
14 15D E4
6 26D E6
Failure code for fix frequency outdoor unit unit(AU*EAA):
Failure description
Room temp. sensor abnormal
Indoor coil temp. sensor abnormal
Outdoor temp. sensor abnormal
Outdoor coil temp. sensor abnormal
Over-current malfunction/Power failure
High / Low pressure abnormal
Communication malfunction between indoor and wired
controller
Communication malfunction between indoor and outdoor
abnormal
Drainage system malfunction
Alarm of exterior annunciator
Coil gas pipe temp. Sensor abnormal
Temperature protection malfunction
Diagnostic code for the inverter outdoor unit
Please refers to PCB function part, page 133 and page 134.
Fault description
Fault in indoor ambient
temperature sensor
Fault in indoor coil
temperature sensor
Fault in outdoor ambient
temperature sensor
Fault in outdoor coil
temperature sensor
Overcurrent/ Power
failure
Fault with high pressure
Communication error
between indoor and
outdoor units
Fault in discharging
temperature sensor
Fault with low pressure
a__
Possible cause
Sensor is open-circuit
short-circuit for 2min or longer.
Sensor is open-circuit
short-circuit for 2min or longer.
Sensor is open-circuit
short-circuit for 2min or longer.
Sensor is open-circuit
short-circuit for 2min or longer.
Detected CT current is above the
limit three times within 30min.
High pressure switch is activated
three times within 30min.
Communication error lasts 4min
or longer.
Sensor is open-circuit
short-circuit for 2min or longer.
Low pressure switch is activated
over 30s.
Code on wired
controller
01
02
4A
49
48
53
07
06
08
0B
03
0D
-171-
^ a`
Remedy
or Restorable when given
corrective signal.
or Restorable when given
corrective signal.
or Restorable when given
corrective signal.
or Restorable when given
corrective signal.
Restorable after repair.
Restorable after repair.
Restorable when given
corrective signal.
or Restorable when given
corrective signal.
Restorable after repair.
Flash times of indoor
receiver board
Power LED flashes 1 time
Power LED flashes 2 times
Power LED flashes 3 times
Power LED flashes 4 times
Power LED flashes 5 times
Power LED flashes 6 times
Power LED flashes 8 times
Power LED flashes 9 times
Power LED flashes 10 times
Power LED flashes 11 times
Power LED flashes 12 times
Power LED flashes 13 times
a`