119
14
Check code Operation cause
[E6] 1. Power supply error
Fixed-speed (1) IOL, OCR alarm 2. Fixed-speed compressor IOL operation
[F1] 3. Service valve closed
Fixed-speed (2) IOL, OCR alarm 4. Blockage in indoor/outdoor PMV
5. Miswiring of communication between indoor and
outdoor units
[E6]: IOL operation circuit error compressor 1 side
[F1]: IOL operation circuit error compressor 2 side
Troubleshooting
Diagnostic procedure for check code
Does OCR operate ?
Check the OCR reset button.
(Manual reset)
Is OCR circuit normal ?
1. OCR unit
2. OCR wiring
Are gas pipe, liquid pipe, and
service valve of the outdoor
unit fully open ?
Is the cooling bypass
PMV B normal ?
Is wiring normal ?
Insufficient refrigerant, blockage,
pipe breakage.
Repair OCR circuit.
Open valves fully.
Repair power supply.
Replace fixed-speed
compressor.
Repair IOL circuit.
Check the following:
1. Power supply voltage is
380/400/415V
2. Phase missing, short-
circuit of fixed-speed
compressor power
supply
Is Mg-SW faulty ?
Replace Mg-SW.
No
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
Yes
No
No
No
Cooling bypass PMV B error
No
No
Is IOL circuit normal ?
1. Connector
2. Wiring
3. Outdoor PC board
Is constant speed
compressor normal ?
1. Is compressor winding
normal ?
2. Is compressor locked ?
Yes
Overload operation,
liquid compression
Correct wiring.
(Check miswiring of the outdoor unit according to miswiring check function.)
Yes
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