Page 79
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Troubleshooting
10 TROUBLESHOOTING
The table below lists the anomalies of operation of the unit, the relevant causes and the corrective measures.
For anomalies of any other type or not listed, contact one of
authorised Service Centre for technical as-
sistance.
Anomaly Cause Operation
The unit continues to work,
but without cooling.
Insufficient charge of refrigerant. Refill.
The dehydrating filter is clogged. Replace.
Ice on the suction line. Wrong calibration of overheating.
Increase overheating.
Check the charge.
Excessive noise. Vibration of lines.
Check the clamping brackets, if any.
Whistler emitted by the thermostatic
expansion valve.
Refill.
Check the dehydrating filter.
Noisy compressor. Seized bearings; replace the com-
pressor.
Check that the compressor’s locknuts
are tightened.
Low oil level in the
compressor.
One or more gas or oil leaks in the
circuit.
Identify and remove leaks.
Mechanical failure of the compres-
sor.
Request the intervention of a Service
Centre.
Anomaly of the oil heater of the
compressor’s base.
Check the electric circuit and the re-
sistor of the heater of the motor base,
and replace defective components.
VLS-GB.indd 79 17-06-2009 15:56:49
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