Donaldson Torit Delta P Plus, Installation And Operation Manual

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9
Donaldson Company, Inc.
Troubleshooting
Problem Probable Cause Remedy
No display on the
Delta P Plus Control
No power to the control Use a voltmeter to check for voltage at Terminal TB1.
Fuse blown Check the fuse in the F1 fuse tower. Replace if
necessary.
Display on the Delta P
Plus control does not
read zero when at rest
Out of calibration Disconnect pressure tubing. See Delta P Plus Control
Calibration.
With collector discharging
outside, differential pressure is
present from indoor to outdoor Recalibrate with the pressure tubing attached as
described in Delta P Plus Control Calibration.
Display reads “_ _ _”
Pressure out of the allowable
range Check that high and low pressure tubing is attached
and not leaking. Use a differential pressure
measurement device to verify that the actual
pressure does not exceed 20 “wg.
Delta P Plus Control ON,
but cleaning system
does not start
Not wired to the timing board
correctly Connect the pressure switch on the timer board to
Terminals 7 and 8 on TB3.
Faulty relay Using a multimeter, test relay for proper closure.
Replace if necessary.
Pressure tubing disconnected,
ruptured, or plugged Check tubing for kinks, breaks, contamination, or
loose connections.
Pulse cleaning never
stops
Pressure switch terminals on
the timer board jumpered Remove jumper wire on solid-state timer board
before wirng to Delta P Plus Control.
Pressure switch not wired to the
timer board corrrectly Connect the pressure switch on the timer board to
terminal 7 (normally open) and Terminal 8 (common)
on TB3.
High or low setpoint not
adjusted for system conditions Adjust setpoints to current conditions. See Setpoint
Adjustment.
Pressure tubing disconnected,
ruptured or plugged. 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 filter cartridges if filters do not clean down.
Pressure tubing disconnected,
ruptured, or plugged Check tubing for kinks, breaks, contamination, or
loose connections.