Mitsubishi Heavy Industries FDT100VNAWVH Service Manual page 131

Error code
Remote control:
E59
Indoor unit
control PCB
Outdoor unit
control PCB
1. Applicable model
All models
2. Error detection method
When it fails to change over to
the operation for rotor position
detection of compressor motor
3. Condition of error displayed
If the compressor fails to startup
for 20 times (10 patterns x2
times) continuously.
4. Presumable cause
• Outdoor fan motor anomaly
• Outdoor unit main PCB
anomaly
• Anomalous power source
voltage
• Insufficient or excessive
refrigerant amount
• Faulty component for
refrigerant circuit
• Compressor anomaly
(Motor or bearing)
Note:
LED Green
Keeps flashing
Keeps flashing
5. Troubleshooting
From previous page
power transistor
module OK?
After power OFF, turn SW6-4 of
outdoor unit main PCB ON and
connect the outdoor unit main
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
Diagnosis
YES
Is the (Outdoor unit main PCB anomaly)
NO
YES
Is the
NO
Note(1) Several times restarting
may recover it, because
liquid refrigerant migrated
in the compressor could
YES
be discharged from the
compressor.
NO
130
- -
'19 • PAC-SM-309
Countermeasure
Replace outdoor unit main
PCB.
Replace outdoor unit main
PCB.
Replace compressor.