TM9-4120-400-14
Table 4-2.
TROUBLESHOOTING - continued
MALFUNCTION
TEST OR INSPECTION
C O R R E C T I V E ACTION
Step 1. Observe condenser fan motor for failure. (See para 4-44.)
Replace bad motor.
Step 2. Check for dirty condenser coil or guard. (See para 4-48.)
Clean coil and guard.
Step 3. Check that air outlet louvers are not stuck or jammed in closed position.
Free louvers and control cable. Adjust control, or notify supervisor if actuating cylinder is not
working properly.
8. UNIT OPERATES CONTINUOUSLY ON COOLING CYCLE.
Step 1. Check position of TEMPERATURE SELECTOR switch. (See para 2-2.)
Move selector to WARMER.
Step 2. Check TEMPERATURE SELECTOR switch S3. (See para 4-22.)
Replace it defective.
Step 1. Check for dirty or damaged filterer louvers. (See para 4-13.)
Clean or replace filter. Clean or replace louvers as required.
Step 2. Check for dirty or iced evaporator coil. (See para 4-45.)
Deice and clean coil.
Step 3. Inspect evaporator fan for damage. (See para 4-41.)
Replace fan.
Replace motor.
Step 5. Check to be sure that EVAPORATOR FAN SPEED switch is not set at LOW speed.
Reset switch to HIGH speed.
4-35