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Maintenance
Weekly timer can display the malfunction unit number having trouble (the same as
detector setting address number) and the following trouble code. The corresponding
meaning of the trouble code are as the follow table show (including air conditioner
trouble and group control network trouble):
Code
D4 D3 D2 D1 D0
0 0 0 0 0
0 0 0 0 1
0 0 0 1 0
0 0 0 1 1
0 0 1 0 0
0 0 1 0 1
0 0 1 1 0
0
0 1 1 1
0
1
0
0
0
0
1
0
0
1
0
1
0
1
0
10
0
1
0
1
1
11
0
1
1
0
0
12
0
1
1
0
1
13
0
1
1
1
0
14
0
1
1
1
1
15
1
0
0
0
0
16
1
0
0
0
1
17
1
0
0
1
0
18
1
0
0
1
1
19
1
0
1
0
0
20
1
0
1
0
1
21
1
0
1
1
0
22
1
0
1
1
1
23
1
1
0
0
0
24
1
1
0
0
1
25
1
1
0
1
0
26
1
1
0
1
1
27
1
1
1
0
0
28
1
1
1
0
1
29
1
1
1
1
0
30
1
1
1
1
1
31
Meaning
No trouble(working normally)
1
Indoor ambient temperature sensor abnormal
2
Indoor pipe temperature sensor abnormal
3
Indoor heating overload protection
4
Indoor cooling freezing (overload) protection
5
Indoor unit and outdoor unit communication abnormal
6
Panel (wire controller) and indoor unit communication trouble (air conditioner
displays, central control displays 30)
7
Module abnormal (PFC protection-DC)
No load
8
Compressor overheat
9
CT current abnormal
Outdoor ambient temperature abnormal
Outdoor heat exchanger (pipe temperature) sensor abnormal
Power supply excess/lack voltage protection
High pressure protection
---Outdoor evaporator sensor abnormal
---Cooling overload
EEPROM abnormal
Outdoor return air sensor abnormal
Compressor sensor abnormal
---Indoor evaporator sensor abnormal
Drainage system abnormal
Power supply 3-phase abnormal (lack phase or wrong phase)
Humidity sensor abnormal
Indoor fan motor abnormal (fan motor over-current, fan motor IPM protection,
fan motor Hall components abnormal)
Outdoor fan motor abnormal (fan motor over-current, fan motor IPM protection,
fan motor Hall components abnormal)
Low pressure protection
---Electronic expansion valve abnormal
---Dust removing filter needs to be cleaned
Refrigerant is insufficient
Detector and air conditioner communication abnormal
Abnormal communication with the bus of detector
13
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