Power Supply System Error (Power Supply To Remote Controller) - Mitsubishi Electric FDT125VNVF Technical Manual

Error code Error code
None
Remote controller: Remote controller:
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Remote controller wire
breakage/short-circuit
• Defective remote controller
• Malfunction by noise
• Faulty indoor power PCB
• Broken harness
• Faulty indoor control PCB
Note:
LED LED Green Green Red Red
Keeps flashing Stays OFF
Indoor Indoor
Keeps flashing 2 times flash
Outdoor Outdoor
5. Troubleshooting
Diagnosis
loose connection of remote
controller wire broken or
Disconnect remote
higher detected between X-Y
of indoor unit terminal
FDEN,
FDU Series
Is 24V or higher
between (Brown-Brown) of
transformer secondary
side?
367
-
Power supply system error
Content Content
(Power supply to remote controller)
Isn't there any
YES
controller wires?
NO
Isn't remote
YES
short-circuited?
NO
controller wires.
Is DC15V or
YES
block?
NO
FDT, FDTC, FDUM
FDF Series
Is DC180V
between �-� of
CNW2 (FDTC : CNW3)?
YES
NO
YES
-
'12 • PAC-T-174
Countermeasure
Correct.
Replace wires.
Replace remote controller.
Defective indoor power
NO
PCB ➞ Replace.
Defective indoor control
PCB ➞ Replace.
Replace transformer.
Defective indoor control
PCB ➞ Replace.