Liebert Series 600T - Manual (Page 106)

100 Operation
Step 3. If maintenance is required in the area of the SCC controls or the motorized system circuit breakers (UPS
Output and SBB), transfer the load to the Maintenance Bypass, if available.
a. Close the Maintenance Bypass Breaker (MBB).
b. Open the Maintenance Isolation Breaker (MIB).
c. Open the Bypass Input Breaker (BIB).
Before performing any maintenance on your Liebert Series 600T UPS, observe ALL of the WARNINGS in
4.0 - Maintenance.
!
CAUTION
If your installation does not include a Maintenance Bypass, power must still be
isolated from both sides of the UPS circuit breakers if maintenance is required.
This will result in loss of power to the critical load. Perform an orderly load
shutdown before isolating power.
!
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.