17
10.3 Troubleshooting Procedure
Each power pack enclosure is equipped with an interlock switch for
the power pack 120 VAC circuit. Since the power pack enclosure
lid cover is open for troubleshooting the interlock switch should be
engaged (manually or by other means) after placing the toggle switch
in the on position and disengaged when placing the toggle switch in
the off position.
All connectors on the power pack are identified with name and wire
number with the exception of the ground connector (green wire to
this connection). Refer to Figure 16. Step 1 and Step 2 does not
require a high voltage probe.
If there is a dead short condition or arcing condition usually the
problem is within the collector cell. The power pack should be
confirmed that the power pack is operational, start with step (1),
before proceeding to the step (2). In the event of a dead short
condition the power pack is designed to “shut down” the high
voltage to the ionizer and collector cell circuits causing the indicator
light to flash. When the dead short condition is removed possibly by
the exhaust blower or In Place Cleaning System (if so equipped) or
manual cleaning the high voltage output will return to normal. The
indicator light will be illuminated. The power pack is self protecting
from dead short conditions. The ionizer section supports 10 mil
tungsten wires which apply a high voltage positive charge to the
contaminant particles.
The cell section contains plates alternately charged collecting the
contaminant particles from the ionizer section.
High voltage problems can generally be isolated by reference to
the indicator light. If the indicator light(s) are illuminated and the
unit is moving air but efficiency is below normal (unicells not dirty,
smoke discharging from the exhaust blower) check for properly
aligned unicells. Refer to Figure 6.
A high voltage probe is required to measure high voltages to the
ionizer and collector circuits to the unit and performing the “Bench
Test Procedure”. As an accessory, a high voltage probe can be
purchased for a multimeter.
High Voltage Specifications:
Ionizer Circuit Operating Range: 10.0 to 11.8 KVDC
Collector Cell Circuit Operating Range: 5.0 to 7.5 KVDC
There are two factors which will elevate ionizer voltages above
12.0 KVDC.
1. The ionizer wires are heavily coated with contaminant (two to
three times or greater, the diameter of the wire). This will decrease
collection efficiency.
2. There are “run away” voltages to the power pack requiring
power pack replacement, above 12.0 KVDC to the ionizer circuit,
and 7.5 KVDC to the collector cell circuit.
There will 7.5 KVDC. This is also caused by “run away” voltages
to the power pack requiring power pack replacement. A high
voltage measurement can be performed by removing both the
high voltage wires from the power pack to determine high voltage
output refer to “Testing the Power Pack” in the “Bench Testing
Procedure”. The high voltage measurement should not exceed
“High Voltage Specifications”.
The PSG system can consist of one or more modules. Each
module represents an independent collection system, 1, 2 or 3
unicells in series with a power pack enclosure. The power pack
enclosure indicator light is the reference in determining the module
status. The indicator light illuminated represents a working module,
usually within high voltage specifications. An indicator light flashing
or not illuminated exhibits an abnormal condition.
10.1 Tools Required
• Multimeter
• High voltage probe accessory for the multimeter
• High voltage test cables (2), 3’ in length with test clips at
each end
• Basic hand tools
• *One power pack (Parker Part Number 21-1216)
• AC cable with three prone plug (for the wall receptacle), opposing
end of cable should have two connectors for the power pack
and a test clip for the ground wire. The ground wire should be
secured to the ground stud on the power pack.
* A power pack can be utilized from one of the modules.
10.2 Perform Before Troubleshooting
The following should be checked to the module(s) in
which the indicator light(s) is flashing or is not illuminated.
Corrections should be completed and parts replaced.
•
Toggle switch is in the on position to the power pack
enclosure.
• Check adjustment of the push rod which engages the interlock
switch refer to Section 9.5 “Adjusting Push Rods”.
• Proper electrical alignment to the unicell components, refer Figure
6, correct if necessary.
• The proper numbers of unicells are installed to the module.
• Unicell components have a moderate to extreme contaminant
build up, manually clean the unicell components.
• Ionizer wires and tension springs missing or broken, remove
broken wires/springs from the drain sump and or the unicell
components
• Ionizer standoffs, cell triangular and or door feed through insulators
display moderate to extreme contaminant build up, broken or
carbon tracked insulators, clean or replaced (imbedded black
streak which cannot be removed by cleaning, replace insulator).
Figure 16
Power Pack Input and Output Connections
