Airedale TurboChill FreeCool 200kW - 1830kW - Manual (Page 133)

133 Chiller Technical Manual 7525355 V1.1.0_04_2013
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Chillers TurboChill™ Air Cooled and FreeCool
(1) The water flow is reduced however the differential pressure switch may still remains healthy as the pressure would
increase.
Fault Possible Cause Remedy / Action
W
aterside
Pump not operating
No power to pump.
Check isolator, fuses, MCBs, contactor
and control circuit wiring.
Inverter tripped and does not
auto reset (the microprocessor
will try and auto reset 3 times)
Reset inverter drive via microprocessor.
No water flow Strainer blocked. Clean strainer
Pump noisy
Air in water system. Purge air from water system.
Pump cavitations.
Ensure there is 0.5m NPSH suction
head to avoid cavitations.
Unit not operating
due to water pressure
sensor low limit alarm.
Low flow alarm operating.
Check that the low flow pressure
variable is set correctly. If too high the
unit may have nuisance trips.
Low temp limit alarm
Partial blockage in evaporator
causing low flow.(1)
Clean evaporator
No heatload on system Ensure heatload is avaliable for unit to operate
Water/ Glycol freezing
up (crystallizes)
Insufficient glycol / water concentration
for operating temperatures.
Check glycol concentration and add accordingly.