Repair Section
49
(3) 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.
6.4 Basic Inspection
• Perform the following inspection before disassembly.
(1) Inspection of plate fins
• To inspect the plate fins of either the evaporator
or condenser, 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 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 reseller concerning
operational environment requirements.
Condition
Possible Cause
Remedy
Checking Area Cause
Abnormal noise or
vibration.
1. Fan. Fan interference. Repair interfering section.
Fan deformation. Replace fan.
2. Compressor fixing nuts. Loose nuts. Tighten nuts further.
3. Piping. Pipe interference. Repair interfering section.
4. Panel fixing screws. Looseness of screws. Tighten screws further.
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