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FAULT FINDING
The following guide has been prepared should a fault develop with the fluidized bath. If the fault cannot be
located by using this guide, contact your local Cole-Parmer dealer.
Fault
Possible cause
The unit fails to operate
Check the fuse, electrical and air supplies
Poor fluidization
Unit not level
Inadequate fluidizing air flow
Inadequate feed air supply
Air filters blocked
Defective air flow meter
Bath over-filled with alumina
Fluidization restricted by large mass placed in bath
Porous plate blocked or damaged
Bed will not fluidise
Inadequate air flow
Inadequate feed air supply
Check pipe work for kinks, leaks or poor connection
Fluidization pressure switch inoperative.
Poor temperature control
Poor fluidization
Eurotherm controller faulty
Transformer faulty
Thermocouple faulty
Power on but air controller does
not illuminate.
Inadequate feed air supply
Poor hose connection
Bath alumina level too low
Air flowmeter faulty
Inadequate fluidizing air flow
The flowmeter float does not
rise.
Check the air inlet supply is 60 psi
Check pipe work for kinks, leaks or poor connection
Air flowmeter faulty
Airflow solenoid valves not working
Flowmeter valve faulty
Air extraction not working
Check the air inlet supply is 60 psi
Check the air extraction air pressure is 50 psi
Check pipe work for kinks, leaks or poor connection
Venturi requires setting up
Exhaust filter clogged
Poor heating up of the unit
Heater element faulty
Thermocouple faulty
Front solid state relay faulty
Rear solid state relay faulty
Eurotherm controller faulty or parameters incorrect
Over temperature circuit not set at correct over current value
Dust collection jar is filling too
quickly
Bath over-filled with alumina
Bath is over-fluidizing; reduce air flow
Dust leaking from collection jar
Collection jar damaged or chipped; replace jar
Seals damaged or loose
Remote temperature control not
working
Check the RS232 connection between the unit and PC comms
connection
Check the remote button is illuminated on the 2408 controller
Check TechneWorks software installed correctly
2408 controller comms PCB faulty
