TM 9-4120-385-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
High voltage in air conditioner can kill.
1. AIR CONDITIONER FAILS TO START IN ANY MODE
Step 1. Check power supply. Is proper power supply connected to unit? 115 volt,
1phase, 50/60 hertz.
Connect proper operating power supply to unit.
Step 2. Check external power supply circuit breakers. Are all circuit breakers in
ON position?
Reset all circuit breakers.
Step 3. Check that CIRCUIT BREAKER (CB) is set to RESET position.
-
Refer to
Step 4. Check position of mode selector switch. Is switch turned to an operating
mode: (LO HEAT, COOL, VENTILATE) ?
Try all switch positions.
Step 5. Check that the LOW and HIGH PRESSURE CUT-OUT switches resets are
in.
(start
Check that all connections are secure.
WARNING
High voltage in air conditioner can kill.