39
Donaldson Company, Inc.
Problem
Probable Cause
Remedy
Insufficient airflow
continued
Pulse cleaning not energized
Use a voltmeter to check the solenoid valve. Make
sure the solenoid valve exhaust port weather cap is
removed.
Solenoid valve failure, constant
air leakage
Replace solenoid valve. Lock out all electrical
power to the collector and bleed the compressed air
system before removing the valve.
Solenoid valve failure, failure to
open
Check voltage output from Solid-State Timer. If
output voltage is present, replace the solenoid valve.
Lock out all electrical power to the collector and
bleed the compressed air system before removing
the valve. Make sure the solenoid valve exhaust port
weather cap is removed.
Diaphragm valve failure
Lock out all electrical power to the collector and
bleed the compressed air system before any
component repair work is completed. Replace the
primary and secondary diaphragms and springs.
Note: To check or replace the large diaphragm,
remove the smaller secondary diaphragm as
described below. Remove the valve body cover
screws and then the diaphragm. When reassembling
the large diaphragm, use a screw driver or punch
to hold the center of the diaphragm against the
housing seat before re-tightening the cover bolts.
To reassemble the smaller secondary diaphragm,
remove the solenoid valve and pipe fittings and push
down on the top of the diaphragm to hold it in the
closed position while tightening the retaining bolts.
Solid-State timer failure
Using a voltmeter, check supply voltage to the timer
board. Check and replace the fuse on the timer
board if necessary. If the fuse is good and input
power is present but output voltage to the solenoid
is not, replace the timer board. See Solid-State Timer
Installation.
Solid-State timer out of
adjustment
See Solid-State Timer and Solid-State Timer Wiring
Diagram.
Troubleshooting
