35
Donaldson Company, Inc.
Problem
Probable Cause
Remedy
NEMA Control Box with Starter, Pulse Control and Phothelic Gauge
Pulse cleaning does
not operate with the
selector switch in the
ON position
Defective wiring
Check wiring to solenoid valves.
Defective solenoid valves
Check solenoid coils and replace as necessary.
Timer control board not
energized
Check supply voltage to timer board. Check the
timer board's fuse. Replace with one of equal value.
If supply voltage and fuse are good, observe the
control board. The outlet LED indicates if the control
board is attempting to pulse. LED's flash to indicate
power to solenoid. Check output with an analog
volt meter using the 150-Volt AC scale. The needle
deflects if voltage is present when LED flashes. If
LED's do not flash or no voltage is present, replace
the timer board.
Pulse cleaning does not
operate with the selector
switch in the GAUGE
position
Defective wiring
Check wiring to solenoid valves.
Defective solenoid valves
Check solenoid coils and replace as necessary.
Timer control board not
energized
Check supply voltage to timer board. Check the
timer board's fuse. Replace with one of equal value.
If supply voltage and fuse are good, observe the
control board. The outlet LED indicates if the control
board is attempting to pulse. LED's flash to indicate
power to solenoid. Check output with an analog
volt meter using the 150-Volt AC scale. The needle
deflects if voltage is present when LED flashes. If
LED's do not flash or no voltage is present, replace
the timer board.
Defective Photohelic air lines
Check tubing and fittings for leaks or obstructions.
Defective Photohelic gauge
Use a voltmeter and the wiring diagram to check for
power at Terminals L1 and L2. If power is present,
move setpoint indicators below gauge pressure
reading. If pulsing does not begin when pressure
exceeds the high setpoint, replace the gauge. If
power is not present at Terminals L1 and L2, check
the CR1 relay function.
Troubleshooting
Содержание DWS 4-1
Страница 11: ...Downflo Workstation DWS 4 1 to 6 4 8 This Page Intentionally Left Blank ...
Страница 20: ...17 Donaldson Company Inc Solenoid Enclosure ...
Страница 42: ...39 Donaldson Company Inc Service Notes Date Service Performed Notes ...
Страница 43: ......