ADDITIONAL CHECKOUT PROCEDURES
The following instructions are for use by qualified service person-
nel only:
The following procedures will expose energized electrical
components. Disconnect power between checks and proceed
carefully. Electrical shock can cause injury or death.
The secondary circuit can also be checked for proper output
voltages using multimeter and high-voltage probe. To check for
proper operation, follow these steps:
1. Remove power supply access cover.
2. Make sure control switch is on and input voltage is as
specified.
3. Make connections from high-voltage probe to multimeter in
accordance with owner’s manual. Meter should be set for
reading DC voltage on 20-v full scale. Check control board
assembly prior to checking cells for damage or carbon patch.
NOTE:
The cell contact should be visually checked for corrosion,
excessive dirt build up, and electrical arc tracking (carbon path
from stainless steel spring to grounded metal).
4. Remove cell access door. Attach high-voltage ground lead
from high-voltage probe to cabinet. While depressing safety
switch lever, touch ionizer wire support bar with end of
high-voltage probe. (See Fig. 18.) Meter should read 6.2
kVDC
±
0.2 kVDC.
5. If no voltage is measured, remove cell and check second cell.
Meter should read 6.2 kVDC
±
0.2 kVDC.
6. If proper voltage is measured, the first cell is shorted. (Refer
to Table 2.)
7. If no voltage is present, remove the second cell. Install first
cell and measure voltage as described above. If voltage is
present, the second cell, which is now out of cabinet, is
shorted. (Refer to Table 2 for cell checkout procedure.)
8. If no voltage is present, remove both cells and measure power
supply output. While depressing safety switch, touch end of
high-voltage probe to either front or rear contact board
assembly. (See Fig. 19.) Meter should read 6.2 kVDC or
higher.
9. If no voltage is measured, check power supply as outlined in
power supply section.
10. Set multimeter for reading AC voltage at 200-v full scale.
With test leads attached to multimeter, touch 2 transformer
output lead junctions to printed circuit board and read meter.
11. If there is no output voltage from 24-v transformer, replace
24-v transformer and power supply.
12. If there is proper output voltage from 24-v transformer,
replace power supply.
OTHER FACTS YOU SHOULD KNOW
Step 1—White Dust
Occasionally "white dust" might be noticed in bedrooms or newly
furnished rooms. This is mainly composed of lint which, because
of its weight, settles before it reaches your unit. This dust is not
mixed with airborne dirt, therefore, it is clean and has no staining
or soiling properties. It will lessen as excess lint works out of
fabrics.
Step 2—Ozone
Under normal operating conditions all electrostatic air cleaners
produce minute quantities of ozone as an incidental by-product, as
do televisions and other electrical appliances. Design of this unit
has been tested and is far below published permissible limits. The
level of detection (when it is noticed) varies from individual to
individual, some being more sensitive to ozone.
Usually a new unit will produce more ozone than 1 that has been
in operation for several weeks. This is due to the normal amount
of sharp corners or manufacturing burrs on the ionizing-collecting
cell. The voltage working on these areas, however, tends to round
them off and the problem is self-correcting.
Fig. 18—High Voltage Check of Ionizer Wire
Support Bar
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Fig. 19—High Voltage Check of Contact Board
Assembly
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