CW-6S INDIRECT COOLER INSTALLATION MANUAL | 29
TROUBLE SHOOTING
Symptom
Cause
Action
Inadequate cooling
Under-sized cooler.
Replace with larger cooler.
Under-sized ducts.
Replace with larger ducts.
Clogged or dirty cooling cores.
Replace core.
Dirty inlet air filter.
Replace or clean filter.
Dry cores or lack of water while cooler is
operating.
Check water distribution system for possible obstruction in hoses. Check
pump.
Insufficient air discharge openings or
inadequate exhaust from building, causing
high humidity and discomfort.
Make sure there is adequate provision for exhausting stale air from
building (open windows and doors).
Excessive resistance from poorly located
exhaust air ducting.
Ensure exhaust air duct is clear of any obstruction.
Excessive ambient humidity (see also item
above re inadequate exhaust).
On days during summer when ambient humidity is high the cooler will not
reduce the temperature as much as on drier days. There is no remedy.
Noisy cooler
Fan out of balance.
Clean the fan. Check Fan condition - no broken blades, missing segments
or obvious damage.
Air distribution system creating too much back
pressure, or changes of direction too sudden,
or diffusers too small.
Have contractor re-evaluate his design; use bends instead of elbows;
change grille sizes.
Attenuator directing noise in wrong direction.
Attach attenuator to direct sound in a different direction.
Pump fails to
operate
Circulation pump motor failure.
Replace circulation pump.
Fan fails to start.
Main power circuit breaker tripped or fuse
blown.
Check cause of overload. Reset circuit breaker or replace fuse. Adjust
motor amp setting if necessary.
Fan motor burned out.
Replace motor.
Low system voltage.
Consult with power supply authority.
Check fault condition via the wall control unit
or the tri-colour LED on cooler electronics
module.
Rectify fault as indicated and restart the cooler.
Wall Control failed.
Replace wall control.
If the wall or remote control is in AUTO or
AUTO TIMER mode and no fan bars are
displayed the fan will not start.
Switch to MANUAL mode to check the fan operation.
Pump runs but no
water circulation
or Pump runs but
pads lack water
Insufficient water in reservoir.
Check probe cable plugged in fully, clean probes.
Water hoses blocked.
Check and clean out blockage.
Pump cavitation plate blocked.
Clean pump cavitation plate.
Continuous
overflow of water.
Water Management probes adjustment not
correct.
Check probe cable plugged in fully, clean probes.
Water being blown
into the building
Auto Drain Valve malfunctioning.
Check and remedy function.
Supply drain plenum blocked.
Un-block supply plenum drain.
Loose water hose connections.
Tighten connections.
Water hose broken.
Replace cracked or broken hoses.
Unpleasant odour
Cooler located near source of unpleasant
odour.
Remove source of odour or relocate cooler.
Algae in tank water.
Drain pan, clean thoroughly with strong cleansing agent, refill, change
pads.
Clean or replace chlorinators.
Pads remain wet after shut down.
Run fan on "vent" for 3 hours after cooling cycle to dry pads out.
Heavy core deposits.
Replace cores.
Cooler cycles ON
and OFF
Fault in the cooler.
Contact your Service Agent.
BMS Control not
functioning
Fault in the building BMS or the MagIQtouch
MS1 BMS controller
Refer to the building BMS system manual and/or the MagIQtouch MS1
BMS Installation and Operation manual supplied with the cooler, as
appropriate.
