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6
When a cleaning service is used, a certificate
showing dates of inspection and/or cleaning shall be
maintained on the premises.
WARNING
Flammable solvents or other flammable
cleaning aids shall not be used.
At the start of the cleaning process, electrical
switches that could be accidentally activated shall
be locked out. Components of the fire suppression
system (if installed) shall not be rendered
inoperable during the cleaning process.
Care should be taken not to apply cleaning
chemicals on any fusible links or other detection
devices of the automatic extinguishing system.
6. Troubleshooting
WARNING:
EXERCISE THE USUAL PRECAUTIONS WHEN WORKING
WITH HIGH VOLTAGE. THE MAXIMUM OPERATING
OUTPUT FROM THE POWER SUPPLY IS 15,000 VDC AND
5.5 MA. to 11.0 MA. WHEN IN PARALLEL.
IF SAFETY SWITCHES ARE CLOSED AND CIRCUIT IS
ENERGIZED, DO NOT TOUCH HIGH VOLTAGE. WHEN
THE CIRCUIT IS DE-ENERGIZED, ALWAYS BLEED OFF
REMAINING STATIC CHARGE WITH AN INSULATED
HANDLED SCREW DRIVER BY SHORTING
GROUND
THE POINTS OF HIGH VOLTAGE DC POTENTIAL.
WARNING
Risk of Electrical Shock
The servicing Instructions are for use by qualified
personnel only. To reduce the risk of electric shock, do
not perform any servicing other than that contained in
the service instructions unless you are qualified to do
so.
A. Introduction
This section on trouble shooting provides a description
of potential malfunctions, their cause, location and
correction. A Trouble Reference Chart listing the most
probable causes and corrections follows the general
text.
NOTE: All repair to the fire suppression system (If
Supplied) must be completed by the authorized fire control
contractor.
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
control 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 meter with a 20 KVDC high voltage probe.
These instruments are standard catalog items by
several manufactures.
B. 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 supply, the
high voltage cables or the ionizing-collecting cell(s). To
isolate the short to any one of these three
components, proceed as follows:
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 12,600 VDC and 6 MA. to 11.0 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.
1. Disconnect both high voltage leads from their
respective terminals in the power supply and support
them away from any point of contact.
2. Energize the power supply:
a. If the light still flickers or does not glow, the trouble
is indicated to be in the power supply. Replace the
power supply in its entirety.
b. If the light glows steady with the leads disconnected
the power supply is indicated to be normal.
NOTE: It will be necessary to close the access door
electrical interlock switch operated by the access door
and affix the junction box lid with hardware supplied to
close the electrical interlock switch on the box, to
complete the primary circuit to the power supply.
3.Next reconnect both high voltage leads to their
respective terminals inside the power supply and
disconnect them at the ionizing-collecting cell(s). Support