Mitsubishi Heavy Industries FDT71VNXVD Service Manual page 58

Error code
WAIT
Remote controller:
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:
LED Green Red
Content
Indoor Keeps flashing Stays OFF
Outdoor Keeps flashing 2 times flash
5. Troubleshooting
Diagnosis
Method to check for inverter PCB before
replacement of blown power supply fuse.
B
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.

- - -
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.
-
'10 • PAC-SM-137$
Countermeasure