Installation, Operation and Maintenance manual
30
DFPRE Large Dust Collectors
TABLE 1 – FAULT LOCATION
Symptom
Possible cause
Action
Part loss of
suction
(excessive
pressure
differential).
Compressed air
malfunction.
If compressor stopped, rectify compressor fault; check interlocks;
check motor and supply; check drive.
If compressor OK, check pulses at manifold pressure gauge.
Clean filters, dismantle and clean moisture separator.
Check for excessive water or oil in compressed air supply, and
possible accumulation in manifold.
No pulses of air to
valves.
Refer to ’Fault location’ table in controller manual supplied with
dust collector.
Unit blocked.
Check dust container is not overfull. Check starter overloads,
fuses and interlocks.
Run unit clear*, then remove each cartridge in turn and renew any
that are damaged.
Motor speed low.
Check line voltage, phases, fan motor connections.
Incorrect fan motor
rotation.
Check electrical connections and transpose if necessary.
Airflow damper
incorrectly adjusted
Check airflow in duct. Adjust damper control until correct airflow
is achieved.
Access panels open or
incorrectly secured
Check all access panels are in place and correctly secured.
Ensure dust container is properly sealed.
Fan exhaust area
restricted
Check fan exhaust area for obstructions.
Total loss of
suction.
Fan motor stopped.
Check motor supply overloads, fuses and interlocks (if fitted).
Check motor connections and windings.
Unit blocked.
Check that dust container is not overfull. Check starter overloads,
fuses and interlocks.
Run unit clear*, then remove each cartridge in turn and renew any
that are damaged.
Ducting blocked.
Check throughout and clear.
Visible effluent in
clean air outlet.
Filter cartridges not
properly sealed.
Check cartridge access covers are seated and seal properly.
Damaged filter cartridge. Damaged cartridges can be identified by the dust present in clean
air chamber. Withdraw cartridge and renew.
*To run unit clear, switch off main fan only and allow the controller to perform several complete
cleaning cycles before switching off compressor etc.
