TM 9-4120-388-14
Table 3-1. Operator's Troubleshooting (Cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. REDUCED COOLING CAPACITY.
Step 1. Be sure that all doors, windows, and other openings in the room or enclosure are tightly closed.
Tightly close all openings.
Step 2. Check operation of TEMPerature control thermostat.
Set control at maximum DECREASE; then, if condition improves, adjust properly.
Step 3. Be sure that the louvers in the conditioned air inlet and outlet grilles are properly adjusted. (Must be open.)
Adjust louvers properly.
Step 4. Be sure that excessive hot, outside air is not being introduced through the fresh air damper.
Fully close damper; then, if condition improves, adjust properly.
3-4
