Alpha Technologies Radium MiniBay - Manual (Page 31)

1 044-001-C0-00, Rev. C
2.0 DC Air Conditioner, continued
2.9 DC Air Conditioner Preventative Maintenance
A preventative maintenance check should be conducted on initial startup, and on a yearly
basis thereafter.
1. Check that the evaporator fans, located on the inside of the door, run continuously.
2. Remove temp setpoint jumper. Make sure the compressor comes on after 10 seconds.
. Check for proper function of the outdoor condenser fans (located under the shroud on the
outside of the door). The outdoor condenser fans are controlled by the temperature of the
outdoor condenser coil. These fans should cycle on and off, or run continuously when the
setpoint jumper is removed. They may not turn on unless outdoor ambient is above 70ºF
(21ºC). As the outdoor condenser coil heats up, first one fan and then the other cycles
on. If the unit is hot already, the fans turn on simultaneously, when the setpoint jumper is
removed. After ten seconds the compressor will turn on.
4. Using a DC clamp-on ampere probe, check the input current to the air conditioner while
the compressor is running. The 48VDC air conditioner should draw between 6A and
10.4A (10.4 FLA, Full Load Amps), for normal operation. The 24VDC air conditioner
should draw between 12A and 20.8A (20.8 FLA).
5. Replace setpoint jumper when functional check is complete.
6. Visually inspect the outdoor condenser coil with a flashlight. It should look clean and clear
of debris. If there is excess dirt build up, turn off circuit breaker, remove shroud and clean
it with soft brush or compressed air (be careful not to damage fins).
7. With a flashlight, visually inspect that the condensate drain is working and clear of debris.
There should be no excess water build up in the pan below the inside evaporator coil.
The evaporator coil should be offset far enough so water drips into the drain pan below,
and does not bead up on the edge of the door.
8. To complete the check, replace the setpoint jumper and all guards. Turn the circuit
breaker on.