990-6537E-001

Shut Down the Single UPS with One Internal Switch into Maintenance Bypass Operation

NOTE: The following is a generic shutdown procedure. All the disconnect devices mentioned may not be present in your specific system.
  1. Generic shutdown procedure for the single UPS system using external maintenance bypass disconnect device Ext. MBB:
    1. Make sure IMB is open.
    2. Select Control > Operation mode > Transfer to bypass operation if possible.
    3. Close Ext. MBB.
    4. Open UOB (if present).
    5. Open SSIB (if present).
    6. Open the battery disconnect device(s).
    7. Open UIB.
  2. Generic shutdown procedure for the single UPS system using internal maintenance disconnect device IMB (no Ext. MBB present):
    1. Select Control > Operation mode > Transfer to bypass operation if possible.
    2. Close IMB.
    3. Open the battery disconnect device(s).
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