DualLite LSN - Maintenance and Support; Safe Shutdown and Routine Maintenance

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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LSN
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 IS
DISCONNECTED AND ALL INTERNAL SWITCHES ARE TURNED OFF.
Do not touch components inside the unit. DC voltage is always present at the batteries and battery cables.
If an external bypass switch is not used, turn off all connected equipment (loads) at their source and proceed
to “Final Shut Down Procedure” below.
A. Bypass Switch Disconnect
Iftheunitutilizesabypassswitch,checkthelabeltodeterminewhetheritisBreak-Before-MakeorMake-Before-
Break.
Followtheinstructionsforthetypeofswitchidentied:
Break-Before-Make: IfaBreak-Before-Make(BBM)externalbypassswitchisused,theswitchwilltemporarily
break inputpowerasitswitchesfromemergencyinverterpowertoutilitypower(LINE)orbacktoCISpower.
1. Shutdownallconnectedequipment(loads)
2. Turn the bypass switch to the LINE position.
3. If necessary,restartconnectedequipment.
Make-Before-Break: IfaMake-Before-Break(MBB)bypassswitchisused.
1. Make sure the AC Line light is on
2. Make sure the “Emergency Power” light on the user interface panel is off.
3. TheLSNsystemmustbeprovidingutilityACpass-throughtotheconnectedequipment.
CAUTION:
IfaMake-Before-Breakbypassswitchisused,equipmentwillbedamagediftheswitchpositionischangedwhen
lineisappliedandtheLSNsystemisoperatinginthe“Off”or“On”(EmergencyBatteryOperation)Mode.Seethe
instructions packed with the bypass switch.
4. Turn the bypass switch to the LINE position.
B. Final Shut Down Procedure
1. Opentheunit’sfrontdoor.
2. Turn off the Master Switch, the Main DC Switch, the Main AC Switch and any Output Circuit Breakers.
CAUTION: HAZARDOUS ENERGY IS STORED IN CAPACITORS INSIDE THE LSN 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,closeandlocktheunit’sfrontdoor.
4. If the unit will be shut off for an extended period of time, recharge the 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 Startup Procedure” outlined in Section 110. Be sure to
complete all of the steps to assure the unit will operate properly.