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Haier 2U18MS2VHB Service Manual page 124

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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Table of Contents
Outdoor
Outdoor
Outdoor
Pro-Series
Multi-Zone
Single-Zone
LED Display
LED Display
LED1 Flash
(CAC)
(CAC)
(RAC)
1
1
1
2
2
2
/
/
3
3
/
/
4
4
4
5
5
5
6
6
6
7
/
7
8
8
8
9
9
9
10
10
10
11
11
11
12
12
12
13
13
13
/
/
14
14
/
/
15
15
15
16
16
16
17
17
17
18
18
18
/
/
19
19
/
/
/
/
20
20
20
/
/
21
21
/
21
/
/
/
22
22
/
/
/
/
23
23
23
/
24
24
24
25
25
25
/
26
/
26
/
/
27
27
27
28
/
/
J-12
Master Error Code Chart
Topic Title
FAULT DESCRIPTION
Outdoor EEPROM failure
IPM overcurrent or short circuit
Outdoor alternating current, over current protection
Compressor over current during deceleration
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
PFC circuit loop voltage
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
Low DC or AC voltage
Terminal block temp too high
Indoor thermal overload
Indoor unit overload protection, heating mode only.
Indoor coil frosted
Indoor anti-frosting protection
PFC circuit loop overcurrent
Indoor coil temperature (abnormal reading)
Module thermal overload
Compressor start failure, over-current
Phase current protection (IPM)
MCU reset
IPM power supply phase loss (3-phase)
Module current detect circuit malfunction
Wiring error: Compressor to IPM
* 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.
TROUBLESHOOTING & REFERENCES
HIGHWALL CONSOLE
COMPACT CASSETTE
Panel LED Flash or
ID PCB LED Flash
Digital
Digital
Display
Display
Yellow Timer LED
(PCB LED5)
F12
F12
2
F1
F1
2
F22
F22
2
/
/
/
F3
F3
2
F20*
F20*
2
F19*
F19*
2
F27
F27
2
F4
F4
2
F8*
F8*
2
F21
F21
3
F7
F7
3
F6
F6
3
F25
F25
3
F30*
F30*
3
/
/
/
E7
E7
3
F13*
F13*
3
F14*
F14*
3
F11
F11
3
F28
F28
3
/
/
/
F15*
F15*
4
E9
/
4
E9*
/
4
E5
/
4
E5*
/
4
/
/
/
/
/
/
F5*
F5*
4
F2*
F2*
4
F23*
F23
4
F9
F9
4
/
/
F24
F24
4
/
/
/
Green Run LED
(PCB LED1)
1
2
3
/
4
5
6
7
8
9
0
1
2
3
4
/
5
6
7
8
9
/
0
0
1
1
2
/
/
3
4
5
6
7
/

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