Mitsubishi SCM40ZS-S Technical Manual page 267

Error code
Remote control: E42
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.
4. Presumable cause
• Defective outdoor main PCB
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note:
LED Green Red
Keeps flashing Stays OFF
Indoor
– 1-time flash
Outdoor
5. Troubleshooting
Diagnosis
From previous page
Is the
checked result of power
transistor module
OK?
YES
• Is the space for installation of indoor and/or outdoor unit enough?
• Is there any short circuit of air on indoor and/or outdoor unit?
• At cooling, does the outdoor fan motor run?
Are the service valves fully opened?
Is the filter clogged?
• At heating, does the indoor fan motor run?
Are the service valves fully opened?
Is the filter clogged?
• Is there any liquid flooding?
Is the superheat within normal range?
Is the suction pipe temperature thermistor normal?
• Is there any anoumalous sound on the compressor?
After
resetting power for
several times does it
become normal?
YES
Temporary noise may cause of anomaly.
If noise source can be found, take countermeasure.
266
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Content
Current cut (2/2)
NO
NO
-
'16 • SCM-T-199
Countermeasure
Defective outdoor main
PCB → Replace.
Defective outdoor main
PCB → Replace.