58
Troubleshooting
Diagnostic procedure for check code
C
Does heating indoor fan
operate normally?
Is the Multi Controller PMV/
solenoid valve normal?
Is there any element to block
heat exchange in the room?
(1) Filter blockage
(2) Heat exchanger blockage
(3) Short circuit (air flow)
Is communication line
between indoor and Multi
Controller units correct?
Refrigerant overcharge
Blockage
Pipe breakage
Abnormal overload
Ye s
No
Ye s
Ye s
Eliminate blocking
element.
Check and modify
wiring.
No
Ye s
Are the connector
connection and coil
normal?
Is there a blockage on
whole valve?
Check Multi Controller
PC board.
If defective, replace
Repair defective
position.
No
Replace PMV unit.
Ye s
Ye s
No
Are the connection
and outdoor fan motor
normal?
Repair defective
connection.
No
Ye s
No
No
Is the sensor resistance
value characteristic TC
normal?
Replace TC sensor.
NoYe s
Check indoor PC board.
If defective, replace
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