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TM 5-4120-377-14
TABLE 4-2. TROUBLESHOOTING (Cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. REDUCED HEATING CAPACITY.
Step 1. Check that all doors, windows, and other openings in the room or enclosure are tightly closed.
Tightly close all openings.
Step 2. If control panel is remotely located, check to be sure that sensing bulb is not near a light bulb or
some type of heat producing equipment.
Turn off or move heat source, or move the remote control panel.
Step 3. Check operation of Temperature control thermostat.
Set control to fully INCREASE; then, if condition improves, adjust properly.
TS4120-377-14M-T42-15
Step 4. Check that the louvers in the conditioned air inlet and outlet grilles are properly adjusted.
Adjust louvers properly.
4-47
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