TM 9-4120-403-14
TABLE 3-1. OPERATOR'S TROUBLESHOOTING (Cont)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4. Check to be sure condenser air inlet and outlet are not obstructed.
Remove obstructions.
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 window, turn selector switch
to OFF and notify your supervisor. If refrigerant sight glass is normal and malfunction still exists,
notify your supervisor.
3-7
