Troubleshooting
55
Fault
Cause
Note
Refrigeration unit not
running or reduced
refrigeration capacity.
Compressor circuit breaker has
tripped.
Reset circuit breaker.
High-pressure fault.
Clean the condenser (air-cooled
version).
Ensure that there is a sufficient amount
of cooling air (air-cooled version).
Air filter mat is dirty.
Replace.
•
on air-cooled
version
Condenser cooling fins dirty.
Clean.
Condenser fan defective (motor coil
overheated).
Allow fan motor to cool off (for
approximately 30 minutes), replace if
necessary.
Entry /exit of cooling air obstructed.
Remove any objects from in front of or
on top of the unit.
Insufficient external suction.
Check.
11.4.1 Refrigerant sight glass
Fig. 8: Refrigerant sight glass (example)
1
Sight glass
2
Indicator
The colour of the indicator indicates the moisture content of the refrigerant.
•
Green
: No moisture in the refrigerant.
•
Yellow
: Moisture in the coolant. Replace the filter drier.
Symptoms of malfunctions:
•
The indicator will turn from green to yellow when there is moisture in the
refrigeration circuit.
•
Continuous formation of bubbles while the compressors are running (can be
seen in the sight glass).
NOTE
In both cases, a refrigerant specialist should be consulted.
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