TM 9-4120-402-14
Table 3-1. Operator Troubleshooting - continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3.
COMPRESSOR STARTS NORMALLY, BUT HIGH PRESSURE CUTOUT SWITCH SOON TRIPS. - continued
Step 2.
Check to be sure condenser air inlet and outlet are not obstructed.
Remove obstructions.
Step 3.
Reset (PUSH) HIGH PRESSURE CUTOUT switch and restart unit.
If unit does not start, notify supervisor.
Step 4.
Check to be sure condenser fan is operating. (Air being discharged from condenser air outlet.)
If fan is not operating, notify 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/RESET and notify supervisor.
Step 6.
Check to be sure that lower front panel is not loose or missing.
Lower front panel must be secure.
4.
REDUCED COOLING CAPACITY.
Step 1.
Check that all doors, windows, and other openings in room or enclosure are tightly closed.
Tightly close all openings.
3-4