22
Indoor Unit
Display
Outdoor Unit Indicators
Malfunction Name
Possible Causes
DIAGNOSTIC CODES
Indoor Coil Freeze Protection -
Frequency Decrease/Limit Mode
Pump Down or Gathering
Refrigerant Status
High Indoor Coil Temperature
in Heating- Frequency
Decrease/Limit Mode
Defrost Mode in Heating
Compressor Overload Protection
Compressor Overload Protection
IPM Module Protection
Indoor DC Fan Motor
Malfunction
Compressor De-Synchronized
Malfunction
Power Factor Correction (PFC)
Protection
Compressor Demagnetization
Protection
Outdoor Fan Motor
Malfunction
High Input Power Protection
Start-Up Malfunction
Compressor phase-lacking/
phase-inverse protection
1) Indoor coil has not reach minimum heating temperature
2) Indoor ambient is abnormally cold
3) Indoor control board malfunction
Optional Service Mode
1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
Operation status
1) Wiring terminal OVC-COMP is loose
2) Refer to the malfunction analysis in Service Manual
1) Incorrect refrigerant charge
2) Metering device malfunction
3) Compressor malfunction
1) IPM module over heating
2) Improper or Low voltage at the IPM module
3) IPM module malfunction
1) Loose connections between fan motor and control board
2) Fan motor or blower wheel bearings malfunction
3) Control board malfunction
1) Compressor voltage is not balance
2) Control board malfunction
3) Compressor malfunction
1) Mis-wiring of the reactor filter and PFC capacitor
2) Reactor filter or PFC capacitor malfunction
3) Control board malfunction
Compressor malfunction
1) Loose connections between fan motor and control board
2) Fan motor malfunction
3) Control board malfunction
1) Compressor malfunction
2) Power circuit malfunction
1) Over charged with refrigerant
2) Control board malfunction
3) Compressor malefaction
Hardware malfunction
FH
Fo
H0
H1
H3
H4
H5
H6
H7
HC
HE
L3
L9
LC
Ld
Yellow
17 flashes
and 1 sec Off
8 flashes
and 1 sec Off
6 flashes and
1 sec Off
4 flashes
and 1 sec Off
14 flashes
and 1 sec Off
9 flashes
and 1 sec Off
Red
4 flashes
and 1 sec Off
14 flashes
and 1 sec Off