Donaldson Company, Inc. © 1995
49
TROUBLE
POSSIBLE CAUSE
REMEDY
7.0 Troubleshooting Guide
4. Filter elements plugged
with particulate.
d. Dust storage area is too
full or plugged.
5. Pulse valves are not
functioning.
a. Pulse valves are
leaking compressed air.
b. Pulse control solid-state
timer board has failed.
D. Insufficient airflow
(cont.).
4d. Clean out dust storage area
as described in the Section
6.4 Dust Removal / Dust
Container in this manual,
reference Figure 1 SDF-4
Phantom View and Section
6.1 Filter Element Removal
and 6.2 Filter Element
Installation.
5a. Lock out all electrical
power to the model SDF
and bleed off the
compressed air supply.
Check for debris, valve
wear, or diaphragm failure
by removing the diaphragm
cover on the pulse valves.
Also check for solenoid
leakage and/or damage.
If pulse valves or solenoid
valves and solenoid tubing
are damaged, replace
part(s).
5b. Check supply voltage to the
timer board with a volt
ohm meter. Check the fuse
on the timer board. If the
fuse is blown, replace it
with one of equal value. If
the fuse and input power to
the control board are okay,
but there is not any output
voltage to the solenoid
pulse control valves,
replace the pulse control
timer board (reference
Section 2.6.3 Solid-State
Timer Specifications and
Figure 29 SDF Solid-State
Timer Wiring Diagram).