TM9-4120-400-14
SYMPTOM INDEX
Malfunction No.
Trouble
AIR CONDITIONER
Does Not Start ln Any Mode. . . . . . . . . . . . . . . . . . . . . . . .
ReducedCoolingCapacity. . . . . . . . . . . . . . . . . . . . . . . .
Reduced Heating Capacity . . . . . . . . . . . . . . . . . . . . . . .
Too Much Heat . . . .. . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .
OPERATOR TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
C O R R E C T I V E ACTION
AIR CONDITIONER DOES NOT START IN ANY MODE.
Step 1. Check that input power has not been disconnected.
Connect input power.
During cool weather do not start in COOL mode for four hours.
Step 2. Check if CONTROL CIRCUIT BREAKER or COMPR CIRCUIT BKR has tripped.
Reset circuit breaker(s).
2. REDUCED COOLING CAPACITY.
Step 1. Check that MODE SELECTOR switch is turned to COOL.
Turn switch to COOL.
Step 2. Check operation of TEMPERATURE SELECTOR.
Set control at maximum COOLER, then, if condition improves, adjust properly.
Step 3. Check that supply and return air louvers are properly adjusted.
Adjust louvers properly.
Step 4. Check that excessive hot, outside air is not being introduced through fresh air damper.
Fully close damper, then, if condition improves, adjust properly.
Step 5. Check that all doors, windows, and other openings in room or enclosure are tightly closed.
Tightly close all openings.
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