Repair Section
68
(4) Abnormal noise or vibration
• To prevent abnormal noise or vibration, carefully determine the source of the problem and come
up with proper countermeasures to solve the problem so that it does not occur again.
8.4 Basic Inspection
• Perform the following inspection before disassembly.
(1) Inspection of plate fins
• To inspect the plate fins of either the indoor or
outdoor heat exchanger, the air filter must be
removed. After removal of the air filters, inspect
the plate fins for any dirt, dust, lint, or debris
that may have caused insufficient cooling or
heating performance of the unit. If cleaning of
the fins is necessary, it is recommended that
this service be performed by a qualified service
technician.
(2) Examination of operating environment
• Operating environments can vary depending on location, climate and surrounding conditions.
Installation location also can cause operational problems. Consult your dealer concerning
operational environment requirements.
Condition Check Area Possible Cause Remedy
Abnormal noise or
vibration
Indoor or outdoor fan Fan interference Repair the interfering
section.
Fan deformation Replace the fan.
Compressor nuts Loose nuts Tighten the nuts.
Piping Pipe interference Repair the interfering
section.
Panel fixing screws Loose screws Tighten the screws.
I001780
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