901-10113 - 33 - 9/16/2024
After completing these power-off checks, remove any tools or service equipment from the condensing
unit, and ensure all personnel are clear of the condensing unit.
Re-connect power to the refrigeration system and turn it on (see Section 3.3)
For the following steps, keep all body parts outside of the condensing unit frame. The unguarded
condenser fan can start at any time and might not be running initially. The compressor should run for
several minutes before these checks and must continue running during them.
• View oil level sight glass on Compressor. Sight glass should be 1/3 to 1/2 full.
• View liquid line sight glass on Condensing Unit. There should be a protective plastic cap over it.
o Sight glass should be filled with liquid refrigerant.
o Sight glass should not show any bubbles.
o Refrigerant should be clear / colorless.
o Moisture indicator should be green.
Figure 10: Arrow at left pointing to oil level sight glass. At top left is a close-up of the decal showing
how to read the oil level sight glass. Arrow at right pointing to liquid line sight glass, which should
be protected by a black plastic cap.
If this inspection reveals any issues, seek assistance from a Refrigeration Service Technician. Upon
passing this inspection, close and latch the cowling. The system may be returned to use.
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