Table 3-3. Unit Troubleshooting.
TEST OR INSPECTION
1. AIR CONDITIONER FAILS TO OPERATE IN ANY MODE.
Check to see if main power cord is plugged in.
Connect power cable to a source supplying 208 VAC, three phase, 50/60/430
Hz input power.
Check to see if circuit breaker is in the ON position.
Place circuit breaker in the ON position.
If the air conditioner will not operate, check for a defective circuit breaker.
Check to see if mode selector switch is in the VENT position.
Place mode selector switch in the VENT position.
If the air conditioner will not operate and no fault lights on the control panel
are on, check for a defective switch.
Check control panel fault light indications.
If a fault light is on, follow the related procedure as follows:
OVER CURRENT light - Check input power voltage. If input power
voltage is correct, refer to malfunction 8, evaporator fan motor failure.
OVER/UNDER VOLTAGE light - Check input power voltage. Correct
fan motor failure. If evaporator fan motor has not failed, proceed to next