TM 9-4120-403-14
TABLE 3-1. OPERATOR'S TROUBLESHOOTING (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4. Check to be sure that condenser fan is operating. (Air being discharged from condenser air
outlet.)
If fan is not operating, shut unit off and notify your supervisor.
Step 5. With unit operating in COOL mode, check condition of refrigerant in sight glass.
If indicator color is in the yellow zone or numerous bubbles appear in the window, turn selector
switch to OFF and notify your supervisor.
If refrigerant sight glass is normal and malfunction still exists, notify your supervisor.
4. REDUCED COOLING CAPACITY.
Step 1. Check that all doors, windows, and other openings in the room or enclosure are tightly closed.
Tightly close all openings.
3-5