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300. Maintenance
300.1 Safe Shut Down Procedure
CAUTION:
To avoid possible equipment damage or personal injury, assume that there is AC voltage present inside the Inverter system
unit any time AC input power or DC battery voltage is applied. The inverter is capable of providing output voltage from
the batteries even when there is no AC input line voltage. When AC input voltage is present, the unit can provide output
voltage even when the batteries are disconnected.
AC AND DC VOLTAGES WILL BE PRESENT INSIDE THE UNIT UNTIL LINE AC
ISDISCONNECTED AND ALL INTERNAL SWITCHES ARE TURNED
OFF.
Final Shut Down Procedure
1. Open the unit’s front access panel.
2. Turn off the DC Input breaker first and then the AC Input breaker. Also turn off all optional AC Output circuit breakers if supplied.
CAUTION: HAZARDOUS ENERGY IS STORED IN CAPACITORS INSIDE THE INVERTER UNIT. AFTER TURNING
OFF SWITCHES, ALLOW 5 MINUTES FOR CAPACITORS TO DISCHARGE BEFORE ATTEMPTING ANY SERVICE PROCEDURES.
3. If the service technician does not need to access the inside of the unit, keep the unit's front cover/door closed.
4. If the unit will be shut off for an extended period of time, recharge batteries every 60 to 90 days.
CAUTION: The batteries will be damaged and the warranty voided if not routinely recharged.
NOTE:
To turn power back on, follow the “System Start-up Procedure” outlined in Section 108. Be sure to complete all of the steps to
as sure the unit will operate properly.
300.2 Routine System Maintenance
The Inverter unit is designed to provide years of trouble-free operation. The unit does require some routine attention to assure peak
performance. Larson Electronics recommends a Preventative Maintenance check be performed by a qualified service technician at least every
six months. The technician must observe important safety precautions while performing the following recommended tasks:
• Inspect and clean the unit interiors
• Inspect all batteries for leaks, case swelling or terminal corrosion
• Perform an emergency operation test to check operation of all critical connected loads
300.3 Manual Routine Inverter Tests
NFPA101 requires that Emergency Lighting Equipment be tested on a monthly basis for a period of at least 5 seconds, and a minimum of
90 minutes once a year. We strongly recommend these guide-lines be followed to insure system readiness, and to prolong battery life. The
Inverter system was designed with a front panel test switch to facilitate monthly testing. Simply depress the button and hold to test the
inverter at anytime. Once released, the Inverter will revert back to standby operation; this may take a few seconds to allow the unit to
synchronize back to the line. For annual 90-minute discharge or other prolonged tests, simply turn off the AC Input breaker.
