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3-65
A
Refrigerant overcharge
Blockage
Pipe breakage
Abnormal overload
Does heating indoor fan
operate normally?
Repair defective
position.
Is indoor PMV normal?
Are connector
connection and outdoor
fan motor normal?
Replace
TC2 sensor.
Is sensor resistance
value characteristic
TC2 normal?
Are connector connection
and coil normal?
Repair defective
position.
Replace
PMV unit.
Is there blockage
on whole valve?
Eliminate blocking
element.
Check and
modify wiring.
Is there any
element to block heat
exchange in the room?
Filter blockage
Heat exchanger blockage
Short circuit
Is communication line
between indoor and
outdoor units correct?
Check indoor P.C. board.
Defective
®
Replacement
NO
NO
YES
YES
NO
YES
YES
NO
YES
NO
NO
YES
NO
NO
YES
YES