Furthermore, the power sense circuit causes the green LED to stop illumination if the battery
backup is powering the output, or the system is off and there is no battery. This circuit also will
cause the red LED to stop illumination if there is no DC output, or the system is off and there
is no battery.
The battery terminals provide a convenient location for checking the battery voltage with a DC
voltmeter. To check the battery voltage, connect the negative voltmeter lead to the “-” terminal
and the positive meter to the “+” terminal.
V. SERVICE AND MAINTENANCE.
SAFETY MESSAGE TO MAINTENANCE PERSONNEL
• Read and understand all instructions before performing any maintenance to this unit.
• To reduce the risk of electrical shock or ignition of hazardous atmospheres, do not perform main-
tenance/service on this device when circuits are energized.
• Any maintenance to the unit MUST be performed by a trained electrician in accordance with NEC
Guidelines and local codes.
• The nameplate, which may contain cautionary or other information of importance to maintenance
personnel, should not be obscured if exterior of housings are painted.
Failure to follow all safety precautions and instructions may result in property damage, serious
injury, or death to you or others.
A. General.
Other than cleaning, no regularly scheduled maintenance is required. To ensure unit is operat-
ing properly, it should be tested at regularly scheduled intervals.
The unit should be tested at least once a year to insure proper operation as follows:
1. OUTPUT VOLTAGE TEST:
Under normal load conditions, the DC output voltage should be checked for proper voltage
level.
2. BATTERY TEST:
Under normal load conditions, check that the battery is fully charged. Check specified volt-
age both at the battery terminal and at the board terminals marked “-BAT+” to insure there
is no break in the battery connection wires.
The Federal Signal Corporation will service your equipment or provide technical assistance
with any problems that cannot be handled locally.
Any units returned to Federal Signal for service, inspection or repair must be accompanied by
a Return Material Authorization. This R.M.A. can be obtained from your local Distributor or
Manufacturer’s Representative.
At that time a brief explanation of the service requested, or the nature of the malfunctions,
should be provided.
Address all communications and shipments to:
FEDERAL SIGNAL CORPORATION
Electrical Products Division
Service Department
2645 Federal Signal Drive
University Park, IL 60466-3195
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