Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 252

Error code
Indoor control PCB
Remote control: E59
Outdoor control PCB
Outdoor inverter
1. Applicable model
Models FDC200, 250VSA
2. Error detection method
3. Condition of error displayed
4. Presumable cause
Note:
LED Green
Keeps flashing
Keeps flashing
Yellow LED
PCB
4-time flash
5. Troubleshooting
From previous page
power transistor
module OK?
After power OFF, turn JSW10-4 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
Compressor startup failure (2/2)
5-time flash
(Models FDC200, 250VSA only)
Diagnosis
YES
Is the (Inverter PCB anomaly)
NO
YES
YES
Is the
NO
Note(1) Several times restarting
may recover it, because
liquid refrigerant
migrated in the
YES
compressor could be
discharged from the
compressor.
NO
251
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'19 • PAC-T-327
Countermeasure
Replace inverter PCB.
* Replace power transistor
as well.
Replace inverter PCB.
* Replace power transistor
as well.
Replace compressor.