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TBA Evaporative Cooler
TROUBLESHOOTING GUIDE
Symptom
Cause
Action
Inadequate cooling
Pump not working correctly
Check plug, wiring and circuit breaker. Check water level
and sensor. Impellor may be jammed or obstructed. Rectify
fault or replace pump.
Dry pads.
Check water flow to pads. Inspect fitment of distributor cap
Check for blocked or kinked hose. If blocked, dismantle,
clean and flush or unkink the hose. Check the inlet solenoid
filter for blockage.
Leaking ducts
Find leaks and seal.
Weatherdamper failing to open.
Break off transport clips. Check for weatherseal/transition
screw interference. Check minimum fan speed setting.
Motor starts and stops at intervals
Loose electrical connections.
Check all electrical connections.
Fan not turning freely.
Determine cause and rectify.
Weatherdamper failing to open.
Break off transport clips. Check for weatherseal/transition
screw interference. Check minimum fan speed setting.
Continually leaking water when
turned off
Dirt under drain valve seal.
Clean and refit seal, clean any remaining debris from tank.
Dirt under float valve seal.
Clean and refit seal.
Damaged float valve seal.
Replace Float Valve seal.
Water level set too high.
Set water level as described.
Water pressure too high.
Install pressure reducing valve.
Unpleasant odour
Odour from new pads
Allow time to condition by running the cooler. Drain the
water, then allow the tank to re-fill.
No variable speed
Faulty electronics module or wall control.
Replace electronics module or wall control.
Minimum fan speed set too high.
Adjust minimum fan speed (page 13 - Electrical Connection)
Noisy unit
Resistance in the ducting system.
Check that sufficient outlets are provided and are open.
Insufficient exhaust openings
Refer to minimum exhaust opening requirements for the
particular cooler, as shown in the table in the Owners
Manual.
Fan is hitting the venturi.
Check that the venturi is installed correctly and that the
transport screws have been removed. Check for loose fan
blades.
No water drain function (drain valve
coolers only)
Drain valve failure.
Replace drain valve.
Drain valve incorrectly connected to electronics module.
Check plug connection and orientation.
Water sensor not operating.
Check sensor. Clean sensor.
No water from drain hose.
Check for blockages in the drain hose.
Unit will not run / Wall control
display fault
No power to cooler.
Check GPO switch and fuse or circuit breaker. Check
isolation switch, power cord plug and circuit breaker on the
electronics module.
No power to the wall control
Check for wall control cable unplugged, faulty or damaged
cable, or faulty (no display or backlighting) wall control.
Replace parts as necessary.
No signal to electronics module
Check for damaged or faulty wall control cable.
(Wall control display appears correct, electronic module
green light has changed to red and is flashing).
Wall control and electronics module not communicating (Wall
control displays “SERVICE” and does not clear by pushing
“ON/OFF”).
Reset the wall control - press and hold for
6
seconds until “SERVICE” disappears from the display.
Mains supply frequency change.
Reset the wall control by pushing “ON/OFF”.
(wall control displays “service”, red light flashes on
electronics module).
Water level sensor not working (if water sensor installed).
(Wall control displays “SERVICE”, red light flashes on
electronics module).
Check that the sensor is correctly connected, and the cable
is plugged in. Clean sensor probes and remove all debris as
necessary.
Insufficient water pressure to raise the water level to the
sensor within 8 mins (if water sensor installed). (Wall control
displays “SERVICE”, after 8 mins red light on electronics
module flashes).
Check that the water pressure is sufficient to fill the tank to
the sensor within 8 minutes.
Drain valve remains open so water does not reach the sensor
within 8 mins (if drain valve installed). (Wall control displays
“SERVICE”, after 8 mins red light flashes on electronic
module).
Check that the drain valve is closed when the unit fills.
Clean debris from the drain valve. Check the drain valve
cable is connected and the plug is oriented correctly.
