Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 141

Error code Indoor display
Remote control:
E59
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
Models FDC100VN(S)X-W
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 ×2
times) continuously
4. Presumable cause
• Faulty outdoor fan motor
• Faulty outdoor unit control PCB
• Faulty inverter 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 JSW10-4 of
inverter PCB ON and connect the
inverter 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 FDC100VN(S)X-W only)
Diagnosis
Is the (inverter PCB anomaly)
power transistor
module OK?
YES
Is the
checker.)
Note Several times restarting may
recover it, because liquid
refrigerant migrated in the
compressor could be discharged
YES
from the compressor.
Does it start?
140
- -
'22 • PAC-SM-422
Countermeasure
Replace inverter PCB.
NO
Replace inverter PCB.
NO
Replace compressor.
NO