IPC PW-H31 1309 NE 1x230v Manuel D'instructions page 31

FAULTS
Water in the oil.
For maintenance and/or repairs, use only original spare parts which offer the greatest characteristics of quality and
reliability. Failure to use original spare parts frees the manufacturer from all responsibility.
English
CAUSES
Excessive humidity in atmosphere.
IMPORTANT:
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REMEDIES
Replace oil.