TM9-4120-398-14
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
AIR CONDITIONER FAILS TO OPERATE IN ANY MODE.
Step 1. Check for tripped circuit breaker.
Reset circuit breaker (See figure 2-1.)
Step 2. Check for defective circuit breaker.
Replace circuit breaker (See paragraph 4-27.)
Step 3. Check for defective power cord.
Replace power cord. (See paragraph 4-30.)
Step 4. Check for defective mode selector switch (S1.)
Replace switch. (See paragraph 4-25.)
Step 5. Check for defective thermostat control (S2.)
Replace thermostat. (See paragraph 4-26.)
Step 6. Cheek for defective control relay (K4, K5.)
Replace relay. (See paragraph 4-28.)
If problem still exists, refer to supervisor.
2.
AIR CONDITIONER STOPS - VENT MODE.
Step 1. Check for tripped circuit breaker.
Reset circuit broker. (See figure 2-1.)
Step 2. Check for defective mode selector switch (S1.)
Replace switch. (See paragraph 4-25.)
Step 3. Check for defective control relay (K4, K5.)
Replace relay. (See paragraph 4-28.)
Step 4.
Check for defective motor starter (K1.)
Replace relay. (See paragraph 4-28.)