4.4 Troubleshooting Pulse Problems
No Filters Are Pulsing
Check the incoming air pressure to the manifold. The system requires air pressure to pulse at all times. The air pressure should be between 60 and 80 PSI. If the pressure is too low, all of the valves may release air at the same time.
Air inlet. Install plug at opposite side of manifold.
Air manifold
Check the Dwyer timer board. Ensure there is 120VAC at terminals L1 and L2 at the bottom of the board. There should be a solid red LED on the left side of the b o ard and a flashing red LED on the right side of the board. The red LED above each number at the bottom of the board should start flashing one at a time every 60 to 120 seconds as soon as the board is powered up. This flash indicates that the board is outputting 120VAC at that terminal , which feeds the solenoid enclosure located at the top of the collector.
Comm LED should be flashing as soon as power is applied to the board on terminal L1 & L2 .
High Limit and Com should be connected together.
Power On Indicator. Should illuminate Red as soon as power is applied to the board on terminal L1 & L2 .
120VAC to power the board .
LED above each number will flash in sequence once every 60 to 120 seconds, or however long the “Time Off ” has been set during programming. When this LED flashes, you should also hear the pulse air fire into the filter .
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