Mitsubishi FDT71VH - Power Source System Error (Power Source to Indoor Control PCB); Power Source System Error (Power Source to Remote Control)

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89
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'20 • PAC-SM-351
Error code
Remote control:
LED Green Red
Indoor
Outdoor
Content
None
Power source system error
(Power source to remote control)
Keeps ashing Stays OFF
Keeps ashing 2-time ash
1. Applicable model
5. Troubleshooting
Diagnosis Countermeasure
Is the connection of the
remote control's wiring OK?
X (white), Y (black)
Does resetting the
power source return
it to normal?
NO
Does the re-measured
voltage between X and Y
in the indoor terminal block
exceed 15 VDC?
YES
NO
YES
NO
NO
YES
Does the voltage
between X and Y in the
indoor terminal block
exceed 15 VDC?
Remove wire for
the remote control
Power source reset
YES
Correct
➞
Insert connector
securely.
Remote control wire
breakage?
Replace remote control.
Malfunction by temporary
noise
Defective indoor unit
control PCB
➞
Replace.
Remote control wire
breakage?
Replace remote control.
2. Error detection method
3 .
Condition of error displayed
4. Presumable cause
• Remote control wire
breakage/short-circuit
• Defective remote control
• Malfunction by noise
• Broken harness
• Faulty indoor unit control
PCB
Note: