Trouble Shooting - Haier AU182XFERA Installation Manual

Trouble shooting

FAILURE STATE OF
CODE LED 5-4-3-2-1
1
2
3
4
5
6
9
10
11
12
13
15
16
17
21
25
26
27
28
29
30
31
Take off the plastic valve cover, you can find the LEDs near to the communication terminal.
Symbol means the LED is ON. Symbol means the LED is OFF.
TROUBLE
SHOOTING
Faulty defrost sensor Te
Faulty sensor Tao
Faulty sensor Ts
Faulty sensor Td
Input overcurrent
Abnormal communication
between indoor and outdoor
units
System high pressure
protection
System low pressure
protection
IPM protection
EEPROM fault
Over hot protection of
compressor
DC fan motor fault
Faulty 4-way valve
switching on
Faulty sensor Tc
Faulty sensor Toci
Abnormal communication
between main PCB and
SPDU
Compressor be locked
Compressor vibration too big Faulty compressor
Compressor lose position
Faulty compressor start
Faulty position checking
circuit
Compressor broken
POSSIBLE REASONS
Sensor disconnected, or broken, or short circuit
Sensor disconnected, or broken, or short circuit
Sensor disconnected, or broken, or short circuit
Sensor disconnected, or broken, or short circuit
Over current of the system, or broken of the current
sensor,or malfunction with indoor or outdoor fan
motors, or faulty PCB.
Wrong connection, or the wires be disconnected, or
wrong address setting of indoor units, or faulty
PCB, or faulty power supply
High pressure switch is disconnected, or high
pressure switch worked, or Tc too high and faulty
outdoor fan motor when cooling, or faulty indoor
fan motors when heating, or refrigerant
overabundance
Low pressure switch is disconnected, or low
pressure switch worked, or Te too low and faulty
outdoor fan motors when heating, or faulty indoor
fan motor when cooling, or refrigerant shortage
IPM over current, or short circuit, or IPM
temperature too high, or IPM input voltage too
low,or faulty SPDU.
Faulty outdoor unit PCB
Serious lack of refrigerant of the system, or the
ambient temperature too high, or PMVs be
blocked
Fan is blocked, or the terminal is disconnected
from the PCB
Coil of 4-way valve is disconnected, or faulty
outdoor PCB
Sensor disconnected, or broken, or short circuit
Sensor disconnected, or broken, or short circuit
Communication cables broken, or not be well
connected, or faulty main PCB, or faulty SPDU
Faulty compressor or SPDU
Faulty SPDU
Faulty compressor or SPDU
Faulty SPDU
Faulty compressor or SPDU
15