Error code
Mitsubishi Electric PUY code UL
No approved translation for this record yet; showing the original text.
Meaning
Abnormal low pressure (63L worked) Abnormal if 63L is worked (under0.03MPa) during compressor operation. 63L: Low-pressure switch (A42N only)
Member details
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View details as a memberPossible causes
(1) Stop valve of outdoor unit is closed during operation. (2) Disconnection or loose connection of connector (63L) on outdoor controller board (3) Disconnection or loose connection of 63L (4) Defective outdoor controller board (5) Leakage or shortage of refrigerant (6) Malfunction of linear expansion valve
Solution
Solution steps are not shared for faults that may be dangerous.
No do-it-yourself solution is given for this fault. For your safety, call an authorised service.
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