TM 9-4120-399-14
Table 3-1. Operator Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Check to see if compressor circuit breaker is in the ON position.
Step 3.
Place compressor circuit breaker in the ON position.
Step 4.
Check to see if temperature control thermostat is in the INCREASE
position.
Place temperature control thermostat in the INCREASE position.
If unit still malfunctions, notify your supervisor.
4. INSUFFICIENT HEATING (HIGH HEAT).
Check to see if mode selector is in HIGH HEAT position.
Step 1.
Place mode selector in HIGH HEAT position.
Check to see if DC control circuit breaker is in the ON position.
Step 2.
Place DC control circuit breaker in the ON position.
Check to see if compressor circuit breaker is in the ON position.
Step 3.
Place the compressor circuit breaker in the ON position.
Check to see if temperature control thermostat is in the INCREASE
Step 4.
position.
Place temperature control thermostat in the INCREASE position.
If unit still malfunctions, notify your supervisor.
3-3