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www.breathe-safe.com.au
Page
38
Issue date
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Controlled document
:
Revision:
WA900-3EO
Solutions
Causes
Symptoms
System Is
Excessively Noisy
Idler pulley whines or
growls. Pulley has rough
spots when rotated by
hand.
Clutch vibrates – may slip.
Rumbling noise from the
system. High discharge or
suction pressure.
Bubbles present in the
sight glass.
Discharge gauge high.
Low suction or discharge
pressure. Bubbles present
in the sight glass.
Suction gauge low.
Worn bearings.
Loose or worn drive belts.
Defective coil winding.
Improper coil connection.
Loose or worn compressor.
Loose panels. Hose or
pipes vibrating. Loose
compressor inside the unit.
Replace pulley bearing
Repair or replace as
necessary.
Tighten or replace as
necessary.
Check mounting. Remove
compressor for service or
replacement.
Faulty compressor.
Thoroughly check unit
panels and components.
Low compressor oil.
Replace compressor.
System overcharged.
Check & rectify.
HP service valve closed.
Low system charge.
Correct system charge.
Open valve immediately.
Excessive moisture in the
system.
Check system for leaks.
Charge system.
Worn motor bearings or
bushes. Damaged or loose
fan blades or fan cowling.
Replace Receiver Drier.
Evacuate & charge system.
Remove blower for repair
or replacement.
Compressor vibrates.
Noisy condenser fan.
Suction gauge high.
Discharge gauge low.
Belts slips and are noisy.
Unit emits a rattling noise.
Noisy compressor.
TX Valve Noisy.
Noisy evaporator fan.
FAULT DIAGNOSIS
