Mitsubishi Electric FDT125VNVF Technical Manual page 409

Error code
Indoor control PCB
E59
Remote controller:
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 Red LED Green LED
PCB
Stays OFF or 4 times flash
5. Troubleshooting
From previous page
power transistor
module OK?
Is it model 200
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)
Keeps flashing
Diagnosis
YES
Is the (inverter PCB anomaly)
YES
After power OFF, turn
NO
SW10-4 of inverter
or 250?
PCB ON and connect
the inverter checker.
Then power ON again.
YES
Is the
Note(1) Several times restarting
may recover it, because liquid
refrigerant migrated in the
compressor could be discharged
YES
from the compressor.
NO
408
- -
'12 • PAC-T-174
Countermeasure
Replace inverter PCB
NO
* For model 200 and 250,
replace power transistor
as well.
Replace inverter PCB
NO
* For model 200 and 250,
replace power transistor
as well.
Replace compressor