Downflo Evolution, DFE 2-8 to 5-80
38
Problem Probable Cause Remedy
Pulse cleaning never
stops
Pressure switch not wired to the
timer board correctly
Connect the pressure switch on the timer board to
Terminals 7 and 8 on TB3.
Pressure switch terminals on
the timer board jumpered
Remove jumper wire on Solid-State Timer board
before wiring to the Delta P Control.
High Pressure On or Low
Pressure Off setpoint not
adjusted for system conditions
Adjust setpoints to current conditions.
Pressure tubing disconnected,
ruptured, plugged, or kinked
Check tubing for kinks, breaks, contamination, or
loose connections.
Alarm light is ON
Alarm setpoint too low Adjust to a higher value.
Excess pressure drop Check cleaning system and compressed air supply.
Replace filters if filters do not clean down.
Pressure tubing disconnected,
ruptured, plugged, or kinked
Check tubing for kinks, breaks, contamination, or
loose connections.
Delta P arrow keys do
not work
Improper operation Press and hold one of the three setpoint keys to use
arrow keys.
Programming keys disabled Remove the Program Disable jumper from Terminals
3 and 4 on TB2.
Cleaning light is ON,
but cleaning system not
functioning
Improper wiring Check wiring between the Delta P Control and
the timer board, and between the timer board and
solenoid valve coils.
Defective solenoids Check all solenoid coils for proper operation.
Timer board not powered Check power ON light on timer board's LED display.
If not illuminated, check the supply voltage to the
timer board. Check the fuse on the timer board.
Replace if necessary.
Timer board defective If LED is illuminated, observe the output display.
Install a temporary jumper across the pressure
switch terminals. Output levels should flash in
sequence. Check output using a multimeter set to
150-Volt AC range. Measure from SOL COM to a
solenoid output. The needle will deflect when LED
flashes for that output if voltage is present. If LED's
do not flash, or if no voltage is present at output
terminals during flash, replace the board.
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