Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 115

Error code Indoor display
Remote control:
E42
Outdoor unit
Outdoor unit
inverter PCB
1. Applicable model
Models FDC100
2. Error detection method
In order to prevent from
overcurrent of inverter,
if the current exceeds the
specifications, it makes the
compressor stopping.
3. Condition of error displayed
• If the output current of inveter
exceeds the specifications,
it makes the compressor
stopping.
• After 3-minute delay, the
compressor restarts, but if
this amonaly occurs 4 times
within 30 minutes after the
intial detection.(FDC100VN(S)
X-W,FDC100VN(S)A-W only)
4. Presumable cause
• The service valves closed
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note:
RUN light
ON
Green LED
Keeps flashing
control PCB
Yellow LED
1-time flash
5. Troubleshooting
Is the
power source
voltage OK?
YES
Are the
service valves
opened?
YES
Is the
high pressure
during operation
OK?
YES
Is the
checked result of
insulation resistance and
resistance between terminals (1) of
compressor motor
OK?
YES
To next page.
TIMER light
Content
1-time flash
Red LED
1-time flash
(Models FDC100 only)
Diagnosis
NO
NO
NO
NO
(1) 1.044Ω or more at 20°C (Model FDC100VNX-W)
1.044Ω or more at 20°C (Model FDC100VSX-W)
0.448Ω or more at 20°C (Model FDC100VNA-W)
1.044Ω or more at 20°C (Model FDC100VSA-W)
0.724Ω or more at 20°C (Model FDC100VNP-W)
114
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'22 • PAC-SM-422
Current cut (1/2)
Countermeasure
Check power source.
Open the service valves.
Check refrigerant amount
and refrigerant circuit
* In case of transitional
increase of high pressure
and/or test run, several
times restarting may
recover it, because liquid
refrigerant (migrated)
in the compressor is
discharged from the
compressor.
Replace compressor.