Table 5-1. TROUBLESHOOTING FOR DIRECT SUPPORT MAINTENANCE Continued
TEST OR INSPECTION
INSUFFICIENT COOLING ACTION
At outside temperatures below 0F(18C) the LPCO must be
Check control settings.
a. Move mode selector switch to COOL.
b. Move temperature selector switch to INCREASE.
If normal cooling does not resume in 15 minutes, go to Step 2.
Frost on the evaporator coil is usually caused by an obstruction to
air flow or dirty evaporator coil, filter, or mist eliminator.
Make sure louvers are open.