Toshiba HFC R407C User Manual

47
Troubleshooting
Diagnostic procedure for check code
A
Does heating indoor fan
operate normally?
Are the Multi Controller PMV/
solenoid valves normal?
Is there any element to block
heat exchange in the room?
(1) Filter blockage
(2) Heat exchanger blockage
(3) Short circuit
Is communication line
between indoor and outdoor
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 fan
motor normal?
Repair defective
position
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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Toshiba HFC R407C Specifications

General

Brand	Toshiba
Model	HFC R407C
Category	Air Conditioner
Language	English