Haier YR-H 71 Service Manual page 34

Failure diagnosis
Upon abnormal operation:
Please read the User s Manual attached with the indoor unit before asking for
repairing. You may contact the after-sales technicians after careful checkup.
When faults arise, the symbol
The central controller faults corresponding to error codes are given in the
following list (including air conditioner faults and group control network faults):
Meaning
Code
Blank
None (normal operation)
1
Fault with indoor ambient temperature sensor
2
Fault with indoor tube temperature sensor
3
Indoor heating overload protection
4
Indoor cooling icing (overload) protection
5
Indoor & outdoor communication error
6
Communication fault between panel (wire controller) and indoor unit
(air conditioner indication, central controller shows 30)
7
Module fault (PFC protection DC)
8
No load
9
Compressor overheating
10
Abnormal CT current
11
Fault with outdoor ambient temperature sensor
12
Fault with outdoor heat exchanger (tube temperature) sensor
13
Protection of supply overvoltage or undervoltage
14
High voltage protection
15
--- Fault with outdoor evaporator sensor
16
--- Cooling overload
17
EEPROM fault
18
Fault with outdoor return gas sensor
19
Fault with compressor sensor
20
--- Fault with indoor evaporator sensor
21
Drain system failure
22
Power supply 3-phase fault (phase lack or mistake)
23
Humidity sensor malfunction
24
Indoor fan failure (fan overcurernt, fan IPM protection, fan Holtz
element fault)
25
Outdoor fan failure (fan overcurernt, fan IPM protection, fan Holtz
element fault)
26
Low voltage protection
27
--- Electronic expansion valve failure
28
--- Dust remover screen needs cleaning
29
Insufficient refrigerant
30
Abnormal communication between monitor and air conditioner
31
Abnormal communication between monitor and bus
appears along with the error code.
34