GeneralAire SSCB-7 SERIES - Manual (Page 5)

are corrosive or abrasive or detergents containing
chlorine or ammonia.
SERVICE
The Air Cleaner when operating normally will have
the fan running and the performance indicator light ON. If
this is not the case the see the Troubleshooting Guide for
probable causes and remedies.
Testing For High Voltage At Power Board
For the following test you will need to have the hinged
cover open with the collecting cell out of the unit.
1. Remove the hinged cover and the cover panel to the
power box. Push a screwdriver into the slot to defeat
the interlock switch and turn the Air Cleaner ON.
2. With a long shafted screwdriver, with a plastic handle,
short between the grounded side of the power box
and the HV1 terminal of the power board.
3. If you draw a good spark, there is high voltage from
the power board.
Measuring High Voltage At Power Board
A high voltage meter capable of measuring up to
10,000 VDC is required to test the voltage.
1. The Air Cleaner should be ON with the cell installed
and the cell access door closed. The Air Cleaner
should be on at least 5 minutes to allow voltage to
stabilize.
2. Remove the hinged cover and the cover panel from
power box.
3. Connect the ground of the high voltage meter to
ground stud in the power box.
4. Turn the Air Cleaner ON, and defeat the interlock
switch.
5. Check terminals HV1 and HV2 on the power board to
determine if voltage is present. See Fig. 5 for values..
5. If no voltage is present, remove the cell from the Air
Cleaner.
a. Check the voltage at HV1 and HV2 again.
b. If voltage is present, the problem is with the cell
or the wiring to the copper contacts.
c. Check the condition of the copper contacts and
wiring.
d. If the contacts are not bent and the wiring is OK,
the problem is with the cell. See the
Troubleshooting Guide for more information.
e. If there is no voltage with the cell removed, check
the power board, system switch and transformer
to make sure that they are functioning correctly.
6. If there is voltage present, but the performance light
does not come on, replace the light.
7. The high voltage can be adjusted with the
potentiometer on the power board if required.
Replacing A Performance Light
Before replacing the performance light, turn OFF
power to the Air Cleaner at the source.
1. Remove the cover and the power box cover panel.
2. Disconnect the performance light wiring connected to
the neon lamp terminals (P5 and P6) on the power
board. Carefully cut the wire ties from the wire
bundle.
3. Push the light out through front of power box.
4. Push the new light into the power box.
5. Connect the wiring to the neon lamp terminals on the
power board, P5 and P6. Route the wires away from
the high voltage section of the power board.
6. Replace cover panel and close the cover.
7. Return power to Air Cleaner. Test light.
Replacing A Power Board
Before replacing the power board, turn OFF power to
the Air Cleaner at the source.
1. Remove the cover and the power box cover panel.
2. Disconnect the wiring from the neon lamp, HV1, HV2
and 24 V terminals. Make note of position of wires.
3. Remove the hex nuts from the power board.
4. Remove the power board from the studs.
5. Place the new board onto studs with the 24 volt input
close to the transformer.
5
Fig. 4 — DAX Detergent is
available in 35 ounce (1 litre)
spray bottles or 1 gallon (4.54 L)
and 4.8 gallons (22 L) containers
from your installer or dealer.
WARNING
Electronic Air Cleaners use high voltage (low
amperage). Only trained personnel should perform
service. USE CAUTION! Electric shock can cause
injury or death.
CAUTION
For most troubleshooting the cell should be
removed from the Air Cleaner. A short in the cell will
cause the power board to shutdown and the
performance light will stay off. Unless otherwise
directed remove the cell from the unit when testing.
WARNING
When performing LIVE tests in the power box NEVER
touch any parts other then what are mentioned in the
tests. Components carry dangerous voltages and
extreme care must be taken.