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YELLOW
DIODE !
DIODE 2
U
56.0 MEG.
N
RED—IONIZER
SAFETY
INTERLOCK
60 HZ
POWER SUPPLY
L2 =>
BLACK—COLLECTOR
A
COLLECTOR RESISTOR, LEFT CELL AND CONTACT BOARD ON F52D ONLY.
CONTACT
FIG. 18—F52 INTERNAL SCHEMATIC DIAGRAM.
2. CHECK COLLECTOR OUTPUT
The
TEST
BUTTON
on the power
supply cover
provides a simple, easy-to-use method of checking for
correct
collector
voltage
in the high voltage power
supply.
When
pushed,
it shorts
from
the collector
terminal to ground. From the sound of the resulting
arc,
the
serviceman
may
determine
whether
or not
the high voltage is supplied to the collector.
a. Turn on the air cleaner and energize the system
fan to power the electronic air cleaner.
b. Push TEST
BUTTON.
Snapping sounds indicate
that the air cleaner is working properly.
c. If no arcing noise is heard, check for continuity
through
the
collector
resistor
(Fig.
21), and
then check for a failure in the electronic cells.
Go on to step 3.
3. REMOVE CELLS
a. Rotate cell latch and swing out cells.
b. With
the
cells
disconnected
from
the power
supply, energize the high voltage power supply.
—]f the indicator
light comes
on
now,
when
it was off with the cells in place, check out
the electronic cells.
—If the indicator light still does not come
on,
there is a problem in the high voltage power
supply or power source. Continue your checkout,
step 4.
Page
14
PRIMARY WINDING OF
FIG. 19—CHECK FOR LINE VOLTAGE.
4. CHECK
LINE
VOLTAGE
POWER
SUPPLY
AND
INDICATOR LAMP
a. Open the power supply enclosure as follows:
(1) Turn off power.
(2) Open the grille.
(3) Remove
the screws
securing the cover on
the power
supply enclosure.
Take
off this
cover.
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