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Haier 2U18MS2VHB Service Manual page 113

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
Special Functions ...................................................................................................................................................................J-3
Auto Restart ..........................................................................................................................................................................J-3
Forced Defrost ......................................................................................................................................................................J-3
Indoor Temperature Display (Highwall Only) .......................................................................................................................J-3
Enhanced Defrost .................................................................................................................................................................J-3
Temperature Compensation ................................................................................................................................................J-4
Matching Tables .....................................................................................................................................................................J-6
Resistance Chart / Sensor Definitions ....................................................................................................................................J-7
Resistance Values ..................................................................................................................................................................J-8
Louver Motors .......................................................................................................................................................................J-8
EEV ........................................................................................................................................................................................J-8
Component Ratings ...............................................................................................................................................................J-9
4-Way Valve ..........................................................................................................................................................................J-9
Basepan Heater ....................................................................................................................................................................J-9
Fan Motors ............................................................................................................................................................................J-9
Refrigeration Diagrams .......................................................................................................................................................J-10
Master Error Code Chart ......................................................................................................................................................J-12
Outdoor Unit Error Codes ....................................................................................................................................................J-16
Temperature Sensor Error Codes ......................................................................................................................................J-16
Pressure-Related Error Codes ...........................................................................................................................................J-17
Communication Error Code ...............................................................................................................................................J-17
Error Codes Caused by Abnormal Refrigerant Circuit Conditions ...................................................................................J-18
Outdoor Error Code Related to Indoor Unit ......................................................................................................................J-18
Error Code Related to the PCB ...........................................................................................................................................J-18
Error Codes Related to the IPM ..........................................................................................................................................J-18
Error Codes Related to Compressor, Outdoor Fan & 4-Way Valve ..................................................................................J-19
Flow Charts ..........................................................................................................................................................................J-20
[1] Outdoor EEPROM Malfunction .....................................................................................................................................J-20
[2] Outdoor IPM over current or short circuit ...................................................................................................................J-20
[4] Communication abnormal between PCB and IPM .......................................................................................................J-21
[6] DC voltage or AC voltage high......................................................................................................................................J-21
[8] Discharge temperature too high protection ................................................................................................................J-22
[9] DC fan motor fault .........................................................................................................................................................J-22
[10] Outdoor defrosting temp. sensor Te abnormal ........................................................................................................J-23
[11] Suction temp.sensor Ts abnormal..............................................................................................................................J-23
[12] Outdoor ambient temp. sensor Ta abnormal ............................................................................................................J-23
[13] Discharging temp. sensor Td abnormal .....................................................................................................................J-23
[15] Communication abnormal between indoor unit and outdoor unit ...........................................................................J-23
[16] Lack of refrigerant or discharging pipe blocked ........................................................................................................J-24
[17] 4-way valve reversing failure ......................................................................................................................................J-24
[18] Compressor motor desynchronizing .........................................................................................................................J-25
[24] Compressor startup failure ........................................................................................................................................J-25
[25] Input overcurrent of the drive module .......................................................................................................................J-25
[42] Open high pressure switch .........................................................................................................................................J-26
[43] Open low pressure switch ...........................................................................................................................................J-26
[44] High pressure detected in system .............................................................................................................................J-27
[45] Low pressure detected in system ..............................................................................................................................J-27
TROUBLESHOOTING & REFERENCES
Table of Contents
TROUBLESHOOTING & REFERENCES
J-1

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