Mitsubishi Heavy Industries SCM50ZS-W User Manual

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143
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'19 • SCM-SM-281
Error code
Remote control:
LED Green Red
Indoor
Content
Error code
Remote control:
LED Green Red
Outdoor unti control PCB
Outdoor unit
inverter PCB
1-time flashKeeps flashing
Yellow LED
Indoor Stays OFFKeeps flashing
Content
1-time flash
E42
Current cut (2/2)
Indoor Keeps ashing Stays OFF
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
After
resetting power for
several times does it
become normal?
NO
YES
Temporary noise may cause of anomaly.
If noise source can be found, take countermeasure.
Is the
checked result of power
transistor module
OK?
NO
• 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 sensor normal?
• Is there any anoumalous sound on the compressor?
YES
YES
From previous page
Defective outdoor unit
main PCB
➞
Replace.
Defective outdoor unit
main PCB
➞
Replace.
2. Error detection method
In order to prevent from
overcurrent of inverter,
if the current exceeds the
specications, it makes the
compressor stopping.
3 . Condition of error displayed
• If the output current of inverter
exceeds the specications,
it makes the compressor
stopping.
4. Presumable cause
• Defective outdoor unit main
PCB
• Faulty power source
• Insufficient refrigerant amount
• Faulty compressor
• Faulty power transistor
module
Note:

Mitsubishi Heavy Industries SCM50ZS-W Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SCM50ZS-W
Category	Air Conditioner
Language	English