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Donaldson Company, Inc. © 1996
SERVICE
INTERVAL
LIGHT
RESET
DOWN
TIME
CLEAN
Figure 7
Unlabeled Window
CONSTANT
CLEAN
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NOTE
All lights in the Maintenance
Required window are red.
1.2.6 Unlabeled Window (Figure 7)
The unlabeled window below the Set Point
Adjustments window provides the operator with the
ability to modify the filter cleaning mode. The normal
cleaning mode provides cleaning only when the
pressure drop is within the range defined by the
Start Clean and Stop Clean set points.
CONSTANT CLEAN—This mode ignores
the set point for Start Clean and Stop Clean
and operates the filter cleaning system
continuously while the blower is running.
Activate this mode by pressing and holding
the Constant Clean button until the indicator
light (GREEN) illuminates. Deactivate the
mode by holding the button down until the
light goes out.
DOWN TIME CLEAN—This mode allows
the filter cleaning to continue after the blower
motor is turned off. After a delay to allow the
blower to stop rotating, the cleaning mode will
then start, sequentially pulse cleaning until
the end of the preset cycle. At the end of the
cleaning cycle, the system shuts down and
remains dormant until the system is
reactivated. This cleaning mode will remain in
effect until turned off, initiating down time
cleaning each time the OFF button shuts the
system down. To activate this mode, press
and hold the DOWN TIME CLEAN button until
the indicator light illuminates (GREEN).
Deactivate the mode by holding the button
down until the light goes out.
SERVICE INTERVAL LIGHT RESET—
This button resets the indicator light located in
the Maintenance Required window.
The system logic requires that the system
be shut down before the reset button will
function. If the system is on, the reset button
will have no effect. To reset the indicator light,
turn the system off, perform the necessary
maintenance (i.e. emptying the hopper/drum
or changing filters), and reset the light before
restarting the blower.
1.2.7 Maintenance Required (Figure 8)
The Maintenance Required window contains a
group of diagnostic functions which, with the
exception of Service Interval, indicate an abnormal
condition exists. The Service Interval indicator will
allow you to schedule routine service as required by
your system. Each of the fault indicator lights, again
with the exception of the Service Interval, is either
reset each time you press the OFF button or reset
automatically when the abnormal condition ends. A
fault light that resets at shut down remains off only if
the fault condition has been corrected. The Service
Interval light has a separate reset button.
PANEL—This indicates that either the
microprocessor-based printed circuit board
has self-diagnosed a fault in its operation or
the power supply voltage applied to the board
is not within acceptable limits.
CLEANING FAILURE—This indicates that
either a solenoid valve, diaphragm valve, or
relay failed to operate resulting in an improper
cleaning pulse. This light will also indicate
either low pressure or complete lack of
compressed air for the cleaning system.
FILTER RUPTURE—This indicates an
unexplained, sudden decrease in pressure
drop across the filter element. Verify this fault
condition by examining the air discharge from
the collector. The fault light may also come on
as a result of either a sudden closure of an
inlet or discharge damper, or other system
changes that cause a rapid decrease in air
flow.
