Trouble shooting
30
Faulty ofoutdoor unit EEPROM
1
15
2
1
IPM overcurrent or short circuit
2
16
2
2
4
18
2
4
Module operated overload
5
19
2
5
6
1A
2
6
8
1C
2
8
Malfunction of the DC fan motor
9
1D
2
9
Malfunction of defrosting temp. sensor
10
1E
3
0
Malfunction of compressor suction temp. sensor
11
1F
3
1
Malfunction of ambient temp. sensor
12
20
3
2
Malfunction of compressor discharge temp. sensor
13
21
3
3
Communication failure between indoor&outdoor unit
15
23
3
5
Lack ofrefrigerant or discharging pipe blocked
16
36
3
6
4-way valve switching failure
17
25
3
7
Loss of synchronism detection
18
26
3
8
Indoor thermal overload
20
28
4
0
Indoor frosted
21
29
4
1
Module thermal overload
23
2B
4
3
Compressor start failure
24
2C
4
4
Module input overcurrent
25
2D
4
5
MCU reset
26
2E
4
6
Module input current detect circuit malfunction
27
2F
4
7
Malfunction of liquid pipe temp. sensor for indoor unit A 28
30
4
8
Malfunction of liquid pipe temp. sensor for indoor unit B 29
31
4
9
Malfunction of liquid pipe temp. sensor for indoor unit C 30
32
5
0
Malfunction of module temp.sensor
Momentary power failure detection
38
3A
5
8
Malfunction of condensing temp. sensor
39
3B
5
9
Malfunction of liquid pipe temp. sensor for indoor unit E 40
3C
6
0
System high pressure switch off
42
3E
6
2
System low pressure switch off
43
3F
6
3
44
40
6
4
45
41
6
5
Timer lamp
flash time
Running lamp
flash time
Communication failure between Module and ECU
Module low or high voltage
Discharging temperature overheating.Lack ofrefrigerant,
ambient temperature too high or PMVs blocked.
Malfunction of liquid pipe temp. sensor for indoor unit D 31
33
5
1
Malfunction of gas pipe temp. sensor for indoor unit A
32
34
5
2
Malfunction of gas pipe temp. sensor for indoor unit B
33
35
5
3
Malfunction of gas pipe temp. sensor for indoor unit C
34
36
5
4
Malfunction of gas pipe temp. sensor for indoor unit D
35
37
5
5
Malfunction of gas pipe temp. sensor for indoor unit E
36
38
5
6
System high pressure protection.Refrigerant
overabundance,High condensing temp. or
malfunction of fan motor.
System low pressure protection.Refrigerant shortage,
Low defrosting temp., or malfunction of fan motor.
Cassette and convertible
indoor display outdoor error
code use the timer and runing
lamp
Wired
controller
display
Outdoor LED
display
Possible reasons
