Nederman FilterMax C 25 Instruction Manual page 20

A valve is not operating correctly
(but there are functioning valves).
Does the display on the control box
show Err + a digit?
YES NO
B
Go to
G
Leaking compressed air system
(notified by sound)
Are the external connections
leaking?
YES NO
Repair the external connections.
H
Abnormal dust levels in the exhaust
air.
Stop the system! Shut off the com-
pressed air and drain the tank.
Are all cartridges properly installed
(check packings)?
NO YES
Install them properly.
F
Is the air temperature below 0 °C ?
NO YES
Check which pulse-jet valve is mal-
functioning by listening. The valve
sequence is 1, 2, 3, 4 (where 1 is
to the left when the door has been
opened).
Dismantle the valve housing and
check that the little air hole in the
diaphragm not is blocked.
Change defective valves (spare
part no. 5).
Stop the system. Decrease the sys-
tem pressure to < 1 bar. Open the
access door and find the leak.
Shut off the pressure and drain the
tank.
Is a pulse-jet valve leaking ?
YES
NO
Dismantle the valve and check for
contamination or damaged parts.
Clean and/or replace damaged
parts.
Look into the cartridges and check
if there are any traces of dust. Dust
on the clean side indicates a leak.
Replace damaged cartridges.
C 25
IMPORTANT!
Turn off the compressed air
supply with the service valve (ac-
cessory) before doing any work
on the cleaning system.
If you have compressed air with a
dew point close to or higher then the
air temperature, the pilot valve may
freeze. An indication is that the valve
starts operating again when the
temperature increases.
IMPORTANT!
Do not pressurise the system
if the temperature is below the
minimum operating temperature
(= -20 °C). At lower air tempera-
tures the process can be started
and operated for a while (approx.
15 min.) whereafter the system
can be pressurised.
Replace other damaged parts.
20