TM 9-4120-401-14
SYMPTOM INDEX
Malfunction No.
Trouble
AIR CONDITIONER
Air Conditioner Does Not Start In Any Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compressor Does Not Start In Cool Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Compressor Starts Normally, But High Pressure Cutout Switch
Soon Trips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Reduced Cooling Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reduced Heating Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T a b l e 3-1. OPERATOR TROUBLESHOOTING
TEST OR INSPECTION
C O R R E C T I V E ACTION
AIR CONDITIONER DOES NOT START IN ANY MODE.
During cool weather do not start in COOL mode for four hours.
Step 1. Check that input power has not been disconnected.
Connect input power.
Step 2. Check to see if CIRCUIT BREAKER has tripped.
Move up to reset circuit breaker. If circuit breaker continues to trip, notify supervisor.
Step 1. Check to see if HIGH PRESSURE CUTOUT switch has tripped.
PUSH and release TO RESET, If cutout switch continues to trip, notify supervisor,
Step 2. Check operation of MODE selector rotary switch.
Turn switch to OFF/RESET, then back to COOL.
