Mitsubishi Heavy Industries FDT100VNAWVH Service Manual page 163

Error code
Indoor display
Remote control:
E42
Outdoor unit
1. Applicable model
All models
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 minute after the initial
detection.
4. Presumable cause
• The valves closed
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note:
RUN light
ON
Green LED
control PCB
Keeps flashing
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
Current cut (1/2)
Red LED
1-time flash
Diagnosis
NO
NO
NO
NO
(1) 0.448 or more at 20°C (Models FDC100-140VNA-W)
1.044 or more at 20°C (Models FDC100-140VSA-W)
162
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'19 • PAC-SM-309
Countermeasure
Check power source.
Open the 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 compresser is
discharged from the
compressor.
Replace compressor.