Mitsubishi Heavy Industries V Multi FDC71VNX Technical Manual page 250

Error code Indoor display
Remote control:
E59
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
Models FDC100-140VNA/VSA
2. Error detection method
3. Condition of error displayed
4. Presumable cause
• Faulty outdoor fan motor
• Faulty outdoor unit main PCB
• Anomalous power source
voltage
• Insufficient or excessive
refrigerant amount
• Faulty component for
refrigerant circuit
• Compressor anomaly
(Motor or bearing)
Note:
RUN light
–
Green LED
Keeps flashing
control PCB
Yellow LED
Stays OFF
5. Troubleshooting
From previous page
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
Try to restart several times
TIMER light
Content
–
Compressor startup failure (2/2)
Red LED
5-time flash
(Models FDC100-140VN A/VSA only)
Diagnosis
YES
Is the (Outdoor unit main PCB anomaly)
power transistor
module OK?
YES
Is the
checker)
Note(1) Several times restarting may
recover it, because liquid
refrigerant migrated in the
compressor could be
YES
discharged from the
compressor.
Does it start?
249
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'19 • PAC-T-327
Countermeasure
Replace outdoor unit main
NO
PCB.
Replace outdoor unit main
NO
PCB.
Replace compressor.
NO