Installation, Operation and Maintenance manual
24
DFPRE 4 Dust Collectors
TABLE 1 – FAULT LOCATION (CONTINUED)
Symptom
Possible cause
Action
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.
Dust container
pressure balance
(if fitted) not
working.
Leaking balance pipe
connection.
Check connections and rectify.
Excessive noise
from diaphragm
valve.
Diaphragm valve failure.
Check for debris, obstruction, valve wear or diaphragm failure.
Replace damaged valve or parts.
*To run unit clear, switch off main fan only and allow the controller to perform several complete
cleaning cycles before switching off compressor etc.
