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Haier 2U18MS2VHB Service Manual page 67

Ductless multi-split heat pump, outdoor/indoor, wall mount - highwall, 2'x2' compact cassette, 3'x3' large cassette, slim duct, mid-static ducted, medium static ducted, console
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The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by
the error code will be the SAME for both indoor and outdoor units even though the numbers may differ.
Indoor
Indoor
Panel
LED4
LED1
Display
2
1
15
2
2
16
2
3
17
2
4
18
2
5
19
2
6
1A
2
7
1B
2
8
1C
2
9
1D
3
0
1E
3
1
1F
3
2
20
3
3
21
3
4
22
3
5
23
3
6
24
3
7
25
3
8
26
3
9
27
4
0
28
4
1
29
4
2
2A
4
3
2B
4
4
2C
4
5
2D
4
6
2E
4
7
2F
4
8
30
4
9
31
5
0
32
5
1
33
5
2
34
5
3
35
5
4
36
5
5
37
5
6
38
5
7
39
5
8
3A
5
9
3B
6
0
3C
6
1
3D
6
2
3E
6
3
3F
6
4
40
6
5
41
0
1
01
0
2
02
0
4
04
0
7
07
0
8
08
0
12
0C
0
13
0D
0
14
0E
Outdoor
Diagnosis
LED
1
Outdoor EEPROM failure
2
IPM overcurrent or short circuit
/
Compressor over current during deceleration
4
Communication failure between the IPM and outdoor PCB
5
Module operated overload (compressor overload protection)
6
Module low or high voltage
/
Compressor current sampling circuit fault
8
Overheat protection for discharge temperature
9
Malfunction of the DC fan motor
10
Malfunction of defrost temperature sensor
11
Suction temperature sensor failure
12
Ambient temperature sensor failure
13
Discharge temperature sensor failure
/
PFC circuit loop voltage
15
Communication failure between the indoor & outdoor unit
16
Lack of refrigerant or discharging
17
4-way valve switching failure
18
Loss of synchronism detection
/
Low DC or AC voltage
20
Indoor thermal overload
21
Indoor coil frosted
/
PFC circuit loop overcurrent
23
Module thermal overload
24
Compressor start failure, over-current
25
Phase current protection (IPM)
26
MCU reset
27
Module current detect circuit malfunction
28
Liquid pipe sensor failure: Circuit A
29
Liquid pipe sensor failure: Circuit B
30
Liquid pipe sensor failure: Circuit C
31
Liquid pipe sensor failure: Circuit D
32
Gas pipe sensor failure: Circuit A
33
Gas pipe sensor failure: Circuit B
34
Gas pipe sensor failure: Circuit C
35
Gas pipe sensor failure: Circuit D
36
Gas pipe sensor failure: Circuit E
/
Compressor overcurrent detected by IPM
38
Malfunction of module temperature sensor momentary power failure detection
39
Malfunction of condensing temperature sensor
40
Liquid pipe sensor failure: Circuit E
41
Toci temperature sensor failure
42
High Pressure switch open
43
Low Pressure switch open
44
System high pressure protection: Overcharged, high condensing temperature or malfunction of fan motor
45
System low pressure protection: Undercharged, low defrosting temperature, or malfunction of fan motor
/
Indoor ambient temperature sensor failure
/
Indoor coil temperature sensor failure
/
Indoor PCB EEPROM failure
/
Communication fault between the indoor and outdoor unit
/
Communication fault between the controller and Indoor unit
/
Drain system malfunction
/
Zero cross signal detected wrong
/
Indoor fan motor malfunction
LARGE CASSETTE TECHNICAL OVERVIEW
Error Codes
Topic Title
E-11

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