Page 12
Translation of the original instructions with assembly instructions AF 73 - 76 S/AF 93 - 96 S, Filtration Group GmbH, 11.07.19,
Mat. No. 79301615, Version 13
13
Troubleshooting
Fault
Possible cause
Remedy
Gear motor
does not turn
Motor fuse tripped
RESET motor fuse
Check gear motor
Filtrate solidified
Clean filter
Valve does not
open
Compressed air
pressure too low
Increase pressure
Pilot valve
defective
Check pilot valve
Pilot valve not
connected
correctly
Check electrical
and pneumatic
connections
Initial
differential
pressure no
longer obtained
Solids
concentration too
high
Improve
prefiltration
process
Gear motor
rotating in wrong
direction
Check direction of
rotation
Cleaning time too
short
Prolong cleaning
time (min. gear
motor speed: 1-2
revolutions)
Increased
concentration
of dirt on clean
side
Filter element
defective
Check filter
element and if
necessary renew
Seals brittle
Check seals and if
necessary renew
Leakage rate at
shaft seal too
high
Gear motor
does not turn
Tighten shaft seal
and if necessary
renew
14
Maintenance
DANGER!
Explosion hazard!
Risk of injury to persons or damage to
property.
Work is only allowed to be carried out in
hazardous areas if appropriate safety
precautions are implemented.
Safety precautions must be implemented
by the owner.
WARNING!
If the system is maintained by unauthorised
persons
Risk of injury
All warranty claims are rendered invalid
The system must be maintained by a suitably trained
person!
Before all maintenance work:
Shut down the metal-edge filter (section 12).
Take steps to prevent the machine/system from being
switched on again by unauthorised persons.
Wear protective clothing and equipment appropriate to
the hazard potential of the medium (e.g. goggles,
respirator, protective clothing, etc.).
Carry out the maintenance work.
Start up the metal-edge filter again (section 10).