MALFUNCTION 2 - TM-9-4120-428-140048

TM 9-4120-428-14

0008 00

MALFUNCTION 2

REDUCED COOLING CAPACITY

SYMPTOM

Air conditioner is not cooling properly.

MALFUNCTION

Air conditioner is not cooling properly.

CORRECTIVE ACTION

1. Check that the MODE SELECTOR switch is turned to COOL. If not, turn

the switch to cool at this time.

2. Check the operation of the TEMPERATURE SELECTOR. Set the

maximum control a COOLER; then, if the condition improves, adjust

properly.

3. Check that the supply and air return louvers are properly adjusted. Re-adjust

louvers when necessary.

4. Check that excessive hot, outside air is not entering through the fresh air

damper. If so, fully close the damper and adjust properly when the

condition improves.

5. Check that all doors, windows, and other openings in the room or enclosed

area are tightly closed. Close all openings when necessary.

6. Check the speed of the EVAPORATOR FAN. Set the switch to HIGH

speed.

7. Check the condenser air inlet guard and discharge air louver for obstruction.

Remove obstruction as necessary.

8. Check the condition of the refrigerant in the sight glass. If the refrigerant

color is yellow in color or numerous bubble appear in the window, turn the

selector to OFF and contact direct support maintenance.

0008 00-2