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1. Disconnect both high voltage leads from their
respective terminals on the power supply and
support them away from any point of contact.
2. Energize the power supply:
a. Confirm the presence of 24 VAC input.
b. If the light still flickers or does not glow, check
for presence of HV output at both ionizer and
collector terminals on the power supply. If no
HV output is noted, the trouble is within the
power supply - replace the power supply in its
entirety.
c. If HV output is noted, the trouble is in the LED.
Confirm LED wiring polarity. Replace the LED if
the light still does not glow.
d. If the light glows steady with the leads discon-
nected, the power supply is indicated to be
normal.
3. Next, reconnect both high voltage leads to their
respective terminals on the power supply.
The trouble can then be isolated to a single cell or
the ionizing or collector section of a given cell as
follows:
a. First determine if the short is in the ionizing
section or the collecting section by connecting
each high voltage lead to its respective section,
one at a time, and energizing the power pack.
(The lead not connected must be supported
away from any point of contact.) The short
symptoms will still exist for the section in which
the short is located. If the trouble causing the
short is bridging both sections, then the short
will be indicated in both sections when they are
individually connected.
b. When the short is isolated to a cell tier,
remove all the cells within the tier and visually
check the sections indicated to contain the
short.
• If the short is in the ionizer section, look for
a broken or defective insulator.
Grease Viper
12
I n s t a l l a t i o n , O p e r a t i o n , a n d S e r v i c e M a n u a l
WARNING
When safety interlock switches are closed, do not
come in contact with high voltage components.
The operating output from the high voltage
power supply(s) is 12,000 VDC and up to 8 MA.
When the power supply(s) is de-energized, there
is a 20 second delay for the voltage to decay.
Always short from ground to a point of high
voltage with a well-insulated jumper wire or an
insulated handled screwdriver to bleed-off any
remaining residual charge.
NOTE
It will be necessary to close the access door
electrical interlock switch operated by the access
door to complete the primary circuit to the power
supply.
The electronic air cleaner is the unit within the system
that has the highest efficiency collection rating and is
also the one with the highest potential for malfunction.
When a malfunction does occur, the outage is usually
found in the electrical secondary circuit in the ionizing-
collecting cell(s).
Indicating lights are installed in the face panel of the
cell access doors to monitor the electrical operation of
each power supply and the ionizing-collecting cell(s)
they energize. The quantity of power supplies per unit
is dependent upon unit size with one or two power
supplies for each ionizing-collecting cell tier in height.
Other than the basic hand tools, it is advantageous to
have a volt/ohm/milliammeter with a 20 KVDC high
voltage probe. These instruments are standard cata-
log items by several manufacturers.
Secondary Short Circuit
The most common outage is a short in the secondary
circuit and is best located through the process of
elimination. Symptoms are a flickering indicating
light accompanied by an arcing noise in the ionizing-
collecting cell(s) or an indicating light that is not glowing.
A flickering light with an arcing noise is an indication
of a high resistance short circuit and a light that is not
glowing is an indication of a dead short. (A light that
is not glowing can also be an indication of an open
circuit in the primary circuit. Refer to the paragraph
on open circuits.) The short may be in the power sup-
ply, the high voltage cables or the ionizing-collecting
cell(s). To isolate the short to any one of these three
components, proceed as follows:
