Mitsubishi Heavy Industries FDT Series Technical Manual page 424

Error code
Indoor control PCB
E59
Remote controller:
Outdoor control PCB
Outdoor inverter
1. Applicable model
Models FDC71-140
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
Compressor startup failure (2/2)
5 times flash
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
- 423 -
'12 • PAC-T-173
(Models FDC71-140)
Countermeasure
Replace inverter PCB
Replace inverter PCB
Replace compressor