CU/CFCU
Condensing Units
20
Condensing Units
Installation & Maintenance Manual : 6259626 IM V1.6.0 04/16
Commissioning
CONTROL CIRCUIT
CHECKS
Please refer to the Airedale matched indoor unit manual for further details.
Cooling Only & Heat
Pump
1
Disconnect the compressor power wiring from the compressor contactor. Switch
on mains power.
2
Check status of the Alarm LED’s on the microprocessor, refer to information
provided with unit.
Under normally stand alone operation LED 4 will flash at 1 second intervals when
the compressor anti-cycle delay is active.
3
After 4 minutes LED 4 will cease flashing and remain constant.
4
Select Cooling mode on the indoor unit and check for continuity between the
COOL and COM terminals on the microprocessor.
5
The compressor should switch on.
6
De-select Cooling mode on the indoor unit and check for no continuity between
the COOL and COM terminals on the microprocessor.
7
The compressor should switch off.
8
Switch off mains power and reconnect compressor power wiring.
Heat Pump Units
Follow steps 1-7 above and then check heating operation as described below:
1
Select heating mode on the indoor unit and check for continuity between the
HEAT and COM terminals on the microprocessor.
2
Check status of the Alarm LED’s on the microprocessor, refer to information
provided with unit.
Under normally stand alone operation LED 4 will flash at 1 second intervals when
the compressor anti-cycle delay is active.
3
After 4 minutes LED 4 will cease flashing and remain constant.
4
The compressor should switch on.
5
De-select heating mode on the indoor unit and check for no continuity between the
HEAT and COM terminals on the microprocessor.
6
The compressor should switch off.
7
Switch off mains power and reconnect compressor power wiring.
