Mitsubishi Electric FDT125VNVF Technical Manual page 419

Error code
None
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
• Broken harness
• Faulty indoor control PCB
• Faulty interface kit
Note:
RUN light TIMER light
Indoor
– –
display
Green LED Red LED
Outdoor
Keeps flashing 2 times flash
control PCB
5. Troubleshooting
Diagnosis
loose connection of remote
controller wires?
controller wire broken or
Disconnect remote
higher detected between X-Y
of interface kit terminal
connecting wires.
higher detected between X-Y
of indoor unit terminal
418 418
- -
Power supply system error
Content
(Power supply to remote controller)
Isn't there any
YES
NO
Isn't remote
YES
short-circuited?
NO
controller wires.
Is DC15V or
YES
block?
NO
Disconnect
Is DC15V or
YES
block?
NO
- -
'12 • PAC-T-174
Countermeasure
Correct.
Replace wires.
Replace remote controller.
Replace interface kit.
Defective indoor control
PCB ➞ Replace.