Step 3. Manually open the UPS input circuit breaker by moving the handle to the OFF position (Figure 8).
Return to the Monitor/Mimic Display to verify status of the circuit breakers. Press the Alarm Reset pad to clear alarm messages.
Step 4. If maintenance is required on the UPS controls, turn the Control Power switch to the OFF position (Figure 8). You may also want to open the Rectifier Input Breaker (RIB), external to the UPS cabinet.
WARNING
LETHAL VOLTAGES ARE PRESENT WITHIN THIS UNIT EVEN WHEN
IT IS NOT ON OR WHEN UTILITY IS NOT BEING SUPPLIED. OBSERVE
ALL CAUTIONS AND WARNINGS IN THIS MANUAL. FAILURE TO DO
SO COULD RESULT IN SERIOUS INJURY OR DEATH. DO NOT WORK
ON OR OPERATE THIS EQUIPMENT UNLESS YOU ARE FULLY
QUALIFIED TO DO SO!! NEVER WORK ALONE.
Before performing any maintenance on your Liebert Series 600T UPS, observe ALL of the WARNINGS in 4.0 - Maintenance.
Local Emergency Modules Off (LEMO)
The UPS controls at the SCC include an Emergency Module Off pad (Figure 10, item 12). When this guarded pad is pressed, the load is automatically transferred to the bypass line and the module output, battery, and input circuit breakers trip open to isolate and shut down all the UPS modules. Control Power for indicators and alarms remains on.
Remote Emergency Power Off (REPO)
The Remote Emergency Power Off control (REPO) is a switch located remotely from the UPS system. It will normally be in the same room as the critical load equipment.
The Remote Emergency Power Off switch removes all power to the critical load.
When you trip the Remote Emergency Power Off switch, all UPS circuit breakers are opened, including the System Bypass circuit breaker (SBB). All power through the UPS is removed from the load. You will still have power to the UPS controls, and you may have power to the static switch.
102 | Operation | DISCONTINUED |
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