Mitsubishi Heavy Industries MHI FDU71VNXVF1 Technical Manual page 336

Error code
Indoor control PCB
Remote control: E59
Outdoor control PCB
Outdoor inverter
1. Applicable model
All models
2. Error detection method
3. Condition of Error displayed
4. Presumable cause
Note:
LED Green
Keeps flashing
Keeps flashing
Yellow LED
PCB
Stays OFF
5. Troubleshooting
From previous page
power transistor
module OK?
After power OFF, turn
SW10-4 of inverter
PCB ON and connect
the inverter checker.
Then power ON again.
inverter output OK?
(Check by inverter
checker)
Try to restart several times
Does it start?
Red
Content
Stays OFF
5 times flash
Compressor startup failure (2/2)
Diagnosis
YES
Is the (inverter PCB anomaly)
NO
YES
Is the
NO
Note(1) Several times restarting
may recover it, because liquid
refrigerant migrated in the
compressor could be discharged
YES
from the compressor.
NO
335
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'12 • PAC-T-178
Countermeasure
Replace inverter PCB
Replace inverter PCB
Replace compressor