3-99
Check code
Operation cause
[E6]
Fixed-speed IOL, OL system alarm (1)
[F1]
Fixed-speed IOL, OL system alarm (2)
1. Power supply error
2. Fixed-speed compressor IOL operation
3. Service valve closed
4. Blockage in indoor PMV/outdoor PMV A, PMV B
5. Miswiring of communication between indoor and
outdoor unit
[E6] : IOL operation circuit error at compressor 1 side
[F1] : IOL operation circuit error at compressor 2 side
( )
(
YES
YES
YES
YES
YES
NO
NO
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
Repair OCR circuit.
Open service valve fully.
Repair outdoor PMV.
Is Mg-SW defunct?
1. Power supply voltage is
380/400/415V ±10% (for 50Hz),
380V ±10% (for 60Hz)
2. Phase missing,short-circuit of
fixed-speed compressor
power supply circuit system
1. Is compressor winding normal?
2. Is compressor locked?
Are following items related
to power supply normal?
Is constant speed compressor normal?
1. OCR unit
2. OCR wiring
1. Connector
2. Wiring
3. Outdoor P.C. board
Is OCR circuit normal?
Is IOL circuit normal?
(Check miswiring of the outdoor unit according to miswiring check function.)
Check there is no blockage or pipe breakage, and then add
refrigerant according to judgment of refrigerant amount.
Does OCR operate?
Check with OCR reset button.
(Manual reset)
Are gas pipe,liquid pipe, and
service valve of the outdoor unit
fully open?
Is wiring normal?
Insufficient refrigerant,
blockage, pipe breakage
Repair power
supply system.
Replace Mg-SW.
Replace fixed-speed
compressor.
Repair IOL circuit.
Set normal wiring.
Overload operation, liquid compression
Are outdoor PMV A
and PMV B normal?
1. Connector connection
2. Wiring 3. Coil
4. Valve unit
5. Outdoor P.C. board
Содержание MMC-P0151H
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