Troubleshooting - Donaldson Torit Delta P Plus Control Installation And Operation Manual

Donaldson Company, Inc.

Troubleshooting

Problem
No display on the
Delta P Plus Control
Display on the Delta P
Plus control does not
read zero when at rest
Display reads "_ _ _"
Delta P Plus Control ON,
but cleaning system
does not start
Pulse cleaning never
stops
Alarm light is ON
8
Probable Cause
No power to the control
Fuse blown
Out of calibration
With collector discharging outside,
differential pressure is present from
indoor to outdoor
Pressure out of the allowable range Check that high and low pressure tubing is attached and
Not wired to the timing board
correctly
Faulty relay
Pressure tubing disconnected,
ruptured, or plugged
Pressure switch terminals on the
timer board jumpered
Pressure switch not wired to the
timer board corrrectly
High or low setpoint not adjusted
for system conditions
Pressure tubing disconnected,
ruptured or plugged.
Alarm setpoint too low
Excess pressure drop
Pressure tubing disconnected,
ruptured, or plugged
Remedy
Use a voltmeter to check for voltage at Terminal TB1.
Check the fuse in the F1 fuse tower. Replace if necessary.
Disconnect pressure tubing. See Delta P Plus Control
Calibration.
Recalibrate with the pressure tubing attached as described
in Delta P Plus Control Calibration.
not leaking. Use a differential pressure measurement
device to verify that the actual pressure does not exceed
20 "wg.
Connect the pressure switch on the timer board to
Terminals 7 and 8 on TB3.
Using a multimeter, test relay for proper closure. Replace
if necessary.
Check tubing for kinks, breaks, contamination, or loose
connections.
Remove jumper wire on solid-state timer board before
wirng to Delta P Plus Control.
Connect the pressure switch on the timer board to terminal
7 (normally open) and Terminal 8 (common) on TB3.
Adjust setpoints to current conditions. See Setpoint
Adjustment.
Check tubing for kinks, breaks, contamination, or loose
connections.
Adjust to a higher value.
Check cleaning system and compressed-air supply.
Replace filter cartridges if filters do not clean down.
Check tubing for kinks, breaks, contamination, or loose
connections.