Error Codes - Haier 2U18MS2VHB Service Manual

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
Outdoor
LED5
LED1
LED
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
3
1
3
2
3
3
3
4
3
5
3
6
3
7
3
8
3
9
4
0
4
0
4
1
4
1
4
2
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
7
5
8
5
9
6
0
6
1
6
2
6
3
6
4
6
5
6
6
0
1
0
2
0
4
0
7
0
8
0
12
0
13
0
14
D-10
Diagnosis
1
Outdoor EEPROM failure
2
IPM overcurrent or short circuit
/
Outdoor alternating current, over current protection
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
/
High outdoor suction temperature
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
/
Position detection circuit fault of compressor
/
Terminal block temp too high
20
Indoor thermal overload
21
Indoor unit overload protection, heating mode only.
21
Indoor coil frosted
/
Indoor anti-frosting protection
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
/
Outdoor pipe temperature protection in cooling mode
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
/
Incorrect match between indoor & outdoor
/
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
COMPACT CASSETTE TECHNICAL OVERVIEW

Error Codes

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