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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
Outdoor
Display
LED
F12
1
F1
2
F22
/
F3
4
F20*
5
F19*
6
F27
/
F4
8
F8*
9
F21
10
F7
11
F6
12
F25
13
F30*
/
E7
15
F13*
16
F14*
17
F11
18
F28
/
F15*
/
E9
20
E9*
21
E5
21
E5*
/
F5*
23
F2*
24
F23*
25
F9
26
F24
27
F10
28
F16
29
F17
30
F18
31
F29
32
F30
33
F31
34
F32
35
F26
36
F34
/
F35
38
F36
39
F33
40
F38
41
F39
42
F40
43
F41
44
F42
45
F43
/
E1
/
E2
/
E4
/
E14*
/
* Hidden indoor error code. LED1 will flash outdoors, but no error will appear on indoor unit display. To view error code on indoor display, press and hold the
Emergency button for 15 seconds.
C-10

Error Codes

Diagnosis
Outdoor EEPROM failure
IPM overcurrent or short circuit
Outdoor alternating current, over current protection
Communication failure between the IPM and outdoor PCB
Module operated overload (compressor overload protection)
Module low or high voltage
Compressor current sampling circuit fault
Overheat protection for discharge temperature
Malfunction of the DC fan motor
Malfunction of defrost temperature sensor
Suction temperature sensor failure
Ambient temperature sensor failure
Discharge temperature sensor failure
High outdoor suction temperature
Communication failure between the indoor & outdoor unit
Lack of refrigerant or discharging
4-way valve switching failure
Loss of synchronism detection
Position detection circuit fault of compressor
Terminal block temp too high
Indoor thermal overload
Indoor unit overload protection, heating mode only.
Indoor coil frosted
Indoor anti-frosting protection
Module thermal overload
Compressor start failure, over-current
Phase current protection (IPM)
MCU reset
Module current detect circuit malfunction
Liquid pipe sensor failure: Circuit A
Liquid pipe sensor failure: Circuit B
Liquid pipe sensor failure: Circuit C
Liquid pipe sensor failure: Circuit D
Gas pipe sensor failure: Circuit A
Gas pipe sensor failure: Circuit B
Gas pipe sensor failure: Circuit C
Gas pipe sensor failure: Circuit D
Gas pipe sensor failure: Circuit E
Outdoor pipe temperature protection in cooling mode
Malfunction of module temperature sensor momentary power failure detection
Malfunction of condensing temperature sensor
Liquid pipe sensor failure: Circuit E
Toci temperature sensor failure
High Pressure switch open
Low Pressure switch open
System high pressure protection: Overcharged, high condensing temperature or malfunction of fan motor.
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
Indoor fan motor malfunction
WALL MOUNT TECHNICAL OVERVIEW

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