Airedale DeltaChill FreeCool 110kW - 1080kW - Manual (Page 160)

DELTACHILL
™
Chillers
160
Chillers
Installation, Commissioning and Maintenance Manual : 7025232 12 / 2013
Troubleshooting
FAULT POSSIBLE CAUSE REMEDY/ACTION
General
Unit Will Not Start No power. Check power supply to the controller.
Wired incorrectly. Check wire connections in accordance with
wiring diagram.
Loose wires. Check all wires, connections, terminals etc.
Remote on/off Check that the remote on/off is at the on
position.
Refrigeration
Compressor not operating No power to compressor. Check isolator, fuses, MCBs, contactor and
control circuit wiring.
Low pressure cut-out operated (large or
complete loss of refrigerant charge). Recover refrigerant, repair, evacuate and
recharge system.
Compressor showing fault on controller Determine fault, refer to alarm codes for
further information.
Head Pressure too high/HP
cut-out operated Condenser coil clogged or dirty. Clean condenser.
Overcharge of refrigerant. Normally
troublesome in warm weather. Remove excess refrigerant from system
using correct refrigerant handling
techniques.
Air or other non-condensable gas in system. Evacuate system and re-charge with new
refrigerant.
Head pressure controller faulty. Check EC fan control module - if faulty -
replace.
Fan not operating or operating inefficiently. Check motor - if faulty - replace.
Head pressure too low Fan operating too fast in low ambient
conditions. Check EC fan control module - if faulty -
replace.