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Malfunction
Defrosting
Anti--- freeze Protection
IPM protection
Low voltage protection
System overload protection
Discharge temperature sensor malfunction
(out of range)
Compressor overload protection
Compressor high voltage/power protection
IPM protection
Indoor PCB Malfunction
DC input voltage is too low
DC input voltage is too high
PFC (power factor correction) board protec-
tion
Indoor motor malfunction
Indoor and outdoor units mismatched
Condenser temperature sensor malfunction
(open or shorted)
Outdoor ambient temperature sensor
malfunction
Discharge temperature sensor malfunction
(open or shorted)
Return air temperature sensor malfunction
Indoor pipe temperature sensor malfunction
Communication malfunction
Missing jumper from indoor board
System high pressure protection
TROUBLESHOOTING (CONTINUED)
Diagnostic Codes
38/40GVC/Q 30k- -36k, 230v
Error Code
on indoor unit
H1
E2
H5
E5
H4
E4
H3
L9
H5
EE
PL
PH
HC
H6
LP
F4
F3
F5
F1
F2
E6
C5
E1
Repair Method/Cause
H1 signal normal operation
Outdoor ambient temperature is too low
IPM module over temperature, low voltage, silica grease problem
Check incoming power
Checked for dirty or blocked heat exchangers
Measure the resistance value in the sensor
Check overload wiring, compressor shell overheat, low charge
Compressor voltage too high, ambient temperature out of range
IPM module over temperature, low voltage, silica grease problem
Replace main indoor board
Check incoming power supply
Check incoming power supply
Refer to Service Manual
Check motor mounting and wiring
Check system combination
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Measure the resistance value in the sensor
Check wiring connection
No jumper on controller or installed improperly or damaged. Corres-
ponding circuit on main board has malfunction.
Poor heat exchange. Are the coils clogged or blocked? Is the ambi-
ent temperature out of system range?
17
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