Page 47
P O W E R I N G T E C H N O L O G Y
Document Number: MS0031-MAN rev. 7
guardian_access_ms31-man-rev7-0521.indd
Chapter 7 Replacing Modules
7.1 Controller Replacement
A faulty Controller can be easily replaced with a new one:
1.
Loosen the front screw in the top left corner of the controller front panel using a flat
screwdriver.
2. Pull the controller out of the system unit.
3. Reverse the process to insert the new controller into the empty slot and fasten the screw.
CAUTION
After controller start-up, verify if the appropriate configuration file is uploaded
to the controller. If necessary refer to the
.
7.2 Rectifier Replacement
NOTE
Rectifiers can be hot-swapped.
This section describes how to replace a faulty rectifier in an active system.
1.
Release the rectifier handles and remove the faulty rectifier.
2.
Insert the new rectifier into the slot and fasten it with the handles. Refer to section 4.8 of
this manual for details.
3. Ignore the module alarm caused by current sharing.
4. After 1 minute the yellow LED starts blinking. Wait for a maximum of 4 minutes for the
indicator to stop blinking.
7.3 Battery and Load Breakers Replacement
WARNING
Make sure the system is switched OFF.
The system unit is designed front accessible for easy maintenance. Battery and load breakers
can be replaced without removing the system unit from the cabinet.
This section describes how to replace faulty breakers.
1. Open the system unit front panel by unscrewing the two knurled nuts to the left side.
2. Unscrew the DC load cable from the faulty breaker.
3. Pull out the faulty breaker(s).
4. Install the replacement breaker(s).
5. Close and lock the system unit front panel.
