REDUCED HEATING CAPACITY. - TM-5-4120-383-140049

TM5-4120-383-14

Table 3-1.

OPERATOR TROUBLESHOOTING-Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2.

Check operation of TEMPERATURE SELECTOR.

Set control at maximum COOLER, then, if

condition improves, adjust properly.

Step 3.

Check that supply and return air louvers are

properly adjusted.

Adjust louvers properly.

Step 4.

Check that excessive hot, outside air is not being

introduced through fresh air damper.

Fully close damper, then, if condition improves,

adjust properly.

Step 5.

Check that all doors, windows, and other openings

in room or enclosure are tightly closed.

Tightly close all openings.

Step 6.

Check if EVAPORATOR FAN SPEED switch is set at LOW

speed.

Set switch to HIGH speed.

Check that condenser air inlet guard or discharge

Step 7.

air louver are not obstructed.

Remove obstruction.

Step 8.

Check condition of refrigerant in sight glass.

If refrigerant color is in the yellow zone or

numerous bubbles appear in window, turn selector

to OFF and contact direct support maintenance.

3. REDUCED HEATING CAPACITY.

Step 1.

See that MODE SELECTOR switch is properly set.

Set switch on LOW or HIGH HEAT.

3-3