Maintenance
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10.5.2 Refrigerant sight glass
Fig. 7: Refrigerant sight glass (example)
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Sight glass
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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.
10.6 Restart
Prior to using the unit/system, it must be absolutely ensured that there are no
safety-critical defects or malfunctions. After the completion of the tasks and prior to
switching the unit/system on, comply with the following (if applicable):
•
Ensure that any safety devices, guards and covers which were removed
prior to commencing the tasks have been properly reinstalled.
•
Ensure that the area around the unit/system is free from tools, materials or
other pieces of equipment that had to be used.
•
Clean the workspace and remove any liquid spills or similar substances.
•
Check whether the safety devices and guards of the unit/system operate
correctly.
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