Mitsubishi Electric FDT125VNVF Technical Manual page 426

Error code
Remote controller:
WAIT
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
• Blown fuse
• Faulty noise filter
• Faulty inverter PCB
• Faulty reactor
• Faulty electrolytic capacitor
Note:
RUN light TIMER light
Indoor
– –
display
Green LED Red LED
Outdoor
Keeps flashing 2 times flash
control PCB
5. Troubleshooting
Diagnosis
Method to check for inverter PCB before
replacement of blown power supply fuse.
From previous
page
Isn't there a
short-circuit between phases of the
noise filter?
NO
Isn't there a
short-circuit between phases of inverter PCB
input terminals?
NO
Isn't there
any crack, burning on the power
transistor module?
NO
Is the reactor OK?
YES
Is the
electrolytic capacitor
OK?
YES
Replace the power
supply fuse.
425 425
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Content
Communication error at
initial operation (3/3)
YES
Replace the
noise filter.
YES
YES
Replace the
inverter PCB.
NO
Replace the reactor.
NO
Replace the electrolytic
capacitor.
- -
'12 • PAC-T-174
Countermeasure