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PM REPLACEMENT
The following operations must only be performed by skilled and specifically trained service personnel.
Refer to the Insertion/Extraction procedure
Possible scenarios:
1. Replacement of a working PM when redundancy is available. Use procedure “A”.
2. Replacement of a Switched off PM or of a faulty PM (i.e. not supplying the load). Use procedure “A” (where applicable)
3. Replacement of a working PM when redundancy is not available. Use procedure “B”.
A. Operation to be performed in order to replace a PM (when redundancy is available):
Verify that the load can be adequately supported by the remaining operational POWER MODULES.
Switch off the selected PM using the “Module Off/On Command” from Command Panel/PM Page (if not already off or
faulty).
Open the associated switch lock.
Extract the PM (Please note that the PM weighs 25 kg and 2-person handling is required).
Insert the new PM, close the Switch Lock and wait for the Stand-by mode (slow flashing red LED)
(1)
.
Switch on the PM using the “Module Off/On Command” from Command Panel/PM Page.
Confirm “Power Module ON Command”.
This command will activate the replaced PM.
Check from the “Power Module” Page that the replaced module is operating correctly.
Verify that all the measurements and the operational status are correct.
B. Operation to be performed in order to replace a PM (when redundancy is not available):
When the number of available PMs cannot adequately support the connected load, it is necessary to put the system into
static bypass.
Using “OnBypass” command from Command Panel/System page, force the system into static bypass mode.
Using “Module Off/On Command” from Command Panel/PM Page, switch off the PM to be replaced.
Open the associated switch lock.
Extract the PM (Please note that the PM weighs 25 kg and 2-person handling is required).
Insert the new PM, close the Switch Lock and wait for the Stand-by mode (slow flashing red LED)
(1)
.
Using “Module Off/On Command” from Command Panel/PM page, switch on the module.
Check from the “Power Module” Page that the replaced module is operating correctly.
From the “Command Panel” page, slide the “OnBypass” command from “I” to “O”. This will return the status to on line
mode.
Check from the “Power Module” Page that the replaced module is operating correctly.
Verify that all the measurements and the operational status are correct.
(1)
If the system is configured with an output frequency of 60 Hz, to activate the new PM frequency automatic detection,
you must reopen the Switch Lock, wait for the LEDs to switch OFF and close the Switch Lock again.
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