SECONDARY CIRCUIT POWER SUPPLY
If the Red CELL ENERGIZED light remains out with the Ionizing-Collecting Cells
removed from the cabinet, the power supply is defective. Specific problems in the
Power Tray Assembly can be isolated by using a Multimeter and High Voltage Probe
to check the output voltages.
To check the secondary circuit, a high voltage meter is required. See the section
entitled RECOMMENDED SERVICE TOOLS (pg. 20). To check for proper operation,
it is imperative that the procedure be followed as outlined below:
1. Make sure the HVAC system is operating, the air cleaner ON/OFF switch is ON,
and air cleaner input voltage is correct (120V, 50-60Hz for 120V units and 240V,
50-60Hz for 240V units).
2. Remove Front Panel Assembly from air cleaner.
3. Remove Power Tray Assembly Cover.
4. Check the high voltage contact board assembly for damage or carbon tracking.
CAUTION:
The cell contacts must be visually checked for corrosion, excessive dirt
build-up, and electrical arc tracking (Carbon path from stainless steel spring to
grounded metal). Clean or replace as required.
5. Replace both Ionizing-Collecting Cells in the air cleaner cabinet.
6. Make test connections from the High Voltage Probe to the Multimeter in
accordance with the probe’s instruction manual. The Multimeter should be set for
reading DC voltage at 20 volt full scale.
7. Attach the High Voltage Probe ground lead to the air cleaner cabinet. While
depressing the safety interlock switch lever, touch the ionizer wire support with
end of the High Voltage Probe. The meter reading should be 6.2 kVDC + .2
kVDC.
8. If no voltage is measured, remove the first Ionizing-Collecting cell and check the
second cell by repeating step #7. The meter should read 6.2 kVDC + .2 kVDC.
9. If proper voltage is measured, the first cell is shorted. Refer to COMMON
TROUBLESHOOTING TECHNIQUES (pg. 9).
Troubleshooting
23
For Qualified HVAC
Installer Only
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