Mitsubishi Heavy Industries FDT90VNPWVH Service Manual page 75

Error code
None
Remote control:
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Remote control wire
breakage/short-circuit
• Defective remote control
• Malfunction by noise
• Faulty indoor unit power PCB
• Broken harness
• Faulty indoor unit control PCB
Note:
LED Green Red
Keeps flashing Stays OFF
Indoor
5. Troubleshooting
Diagnosis
Isn't there any
loose connection of remote
control wire broken or
short-circuited?
Disconnect remote
higher detected between X-Y
of indoor unit terminal
between - of
74
-
Content Power source system error
(Power source to remote control)
YES
control wires?
NO
Isn't remote
YES
NO
control wires.
Is DC15V or
YES
block?
NO
Is DC180V
NO
CNW2?
YES
-
'19 • PAC-SM-334
Countermeasure
Correct.
Replace wires.
Replace remote control.
Defective indoor unit
power PCB➞Replace.
Defective indoor unit
control PCB➞Replace.