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TROUBLESHOOTING & REFERENCES
J-22
ENGLISH
Topic Title
Flow Charts
[8] Discharge temperature too high protection
Reconnect
Is sensor wiring firmly in place?
Is sensor resistance
within range?
Is the system is clogged?
Is the PMV coil wiring ok?
Is stop valve is open?
Replace pressure
switch
Check the piping system
Charge refrigerant
Check the piping system
Reconnect
Ye s
No
Ye s
Ye s
No
Ye s
No
No
Ye s
No
No
Is the ambient temperature too
high?
Replace connecting
board
Ye s
No
Is the system low on
refrigerant?
3U24EH2VHA
Compressor discharge temperature over 115°C. Error
clears within 3 minutes if temperature lowers below
115°C. Error status lock if it occurs 3 times in 1 hour.
Possible causes:
• The sensor is bad or xed bad
• The system is clogged
• The system lack of refrigerant
• The valve opening is wrong
Replace wire and test again
Are the fan motor wires
conductive?
Is the motor running?
Power off and rotate the
fan motor by hand. Does
it turn freely?
Is the terminial voltage
correct?
Replace
PCB
Replace fan
motor
Replace
PCB
Ye s
Ye s
Ye s
Ye s
No
No
No
No
Replace fan motor
[9] DC fan motor fault
DC fan motor damaged, not connected, or related
circuit broken. Error status conrms and locks if occurs
3 times within 30 minutes.
Possible causes:
• Loose motor wiring
• The motor is bad
• The PCB is bad
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