2U20EH2VHA User Manual

Loading ...

TROUBLESHOOTING & REFERENCES

J-1

ENGLISH

TROUBLESHOOTING & REFERENCES

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 Denitions .................................................................................................................................... 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

Reactor ..................................................................................................................................................................................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

Loading ...

User Manual - Page 113