References - Haier AW07LC2VHA Technical Overview

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

REFERENCES

Troubleshooting
Trouble shooting
Wired controller
display(Hex)---for
duct
15
16
18
19
1A
1C
1D
1E
1F
20
21
23
24
25
26
28
29
2B
2C
2D
2E
2F
30
31
32
33
34
35
36
37
38
3A
3B
3C
3D
3E
3F
40
41
REFERENCES
Cassette indoor display outdoor
Wall mounted
Timer lamp Running lamp
indoor display
flash time flash time
2 1
2 2
2 4
2 5
2 6
2 8
2 9
3 0
3 1
3 2
3 3
3 5
3 6
3 7
3 8
4 0
4 1
4 3
4 4
4 5
4 6
4 7
4 8
4 9
5 0
5 1
5 2
5 3
5 4
5 5
5 6
5 8
5 9
6 0
6 1
6 2
6 3
6 4
6 5
F12
F1
F3
F20
F19
F4
F8
F21
F7
F6
F25
E7
F13
F14
F11
E9
E5
F5
F2
F23
F9
F24
F10
F16
F17
F18
F29
F30
F31
F32
F26
F35
F36
F33
F38
F39
F40
F41
F42
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