Hardware
Hardware Maintenance
4 - 40
SKF Multilog On-Line System IMx-M
User Manual
To hot-swap a PSU, perform the following steps:
1. Disarm the rack.
2. Remove the PSU that shall be swapped from the rack according to the
Warning!
If only one power supply unit is used in the rack, this will mean that the
entire rack will be shut down.
3. Insert a new PSU according to the
Warning!
If two power supply units are used in the rack, make sure to check the
compatibility of power supply units. Refer to
4. When all LEDs on the new power supply unit indicates normal operation and no
circuit faults are indicated on other modules, arm the rack.
Important - See also chapter
" for details when shared relays are used.
Important - Hazardous voltages are present in backplane during hot-swap.
Therefore, hot-swap should be done only by trained personnel.
Important - Rack must be set in the rack disarm mode before the hot-swap
procedure takes place. Be sure to read "
" chapter thoroughly and
understand it.
Important - User must ensure that rack is properly configured before disarm is
released after the hot-swap. Be sure to read "
" chapter thoroughly and
understand it. Evaluate circuit faults with diagnostic command "cf" as described in
chapter "
Important - Evaluate channel alarms before disarm is released to avoid
unwanted alert/danger alarms triggered upon arm of the channel or rack.
Important - User must ensure that the rack is running with a correct firmware
before disarm is released after the hot-swap. Be sure to read "
" chapter thoroughly and understand it. It is always recommended to check
with diagnostic command "intd0" that the correct firmware is running on all
protection MCUs. Evaluate circuit faults with diagnostic command "cf" as described
in chapter "
