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Proceed as follows:
•
Step 1. Transfer the system to maintenance bypass fol-
lowing the steps described in section 6.3.1.
•
Step 2. Incorporate the new UPS into the system following
the procedure established in section 5.2.9.2 to leave it in
the same conditions as the rest.
•
Step 3. Disconnect the communication bus between the
first and last device, and reconnect it including the new
UPS. The bus must be closed for proper operation.
•
Step 4. Transfer the system to normal operation following
the steps described above in section 6.3.2.
6.6. HOW TO REPLACE A FAULTY UPS IN AN
OPERATIONAL PARALLEL SYSTEM.
•
The steps to follow to replace a UPS in a system consisting
of two or three units are the same as those for incorpo-
rating a device, except for the difference in the type of ac-
tion to be carried out. Proceed accordingly as described in
section 6.5.
