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
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 troubleshooting 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.
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
Indicating lights are installed in the face panel of the control to monitor the electrical operation of each power supply and the
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
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
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
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. First, check the inline fuse mounted on the circuit board and replace if it is blown. Second, 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, 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
a. If either high voltage lead is defective the light will indicate the trouble. Each lead may then be checked
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