GE Discovery LS - Electrical Energy; Removing Power from the System; Restoring Power to the System; Figure 1-1: A1 Disconnect Panel with LOTO Applied

GE HEALTHCARE
DIRECTION 2307224-100, REVISION 6DISCOVERY LS SYSTEM SERVICE MANUAL
Chapter 1 - Preface Page 37
1.5.2 Electrical Energy
1.5.2.1 Removing Power from the System
1.) To prepare for shutdown of the equipment, notify affected personnel working in the area, via
verbal communication, that LOTO is being performed.
2.) Bring the system software down at the Operator console.
3.) After software shutdown is complete, place the console power switch in the Off position.
4.) Turn off power at the system A1 Panel or Main Disconnect Panel. Make sure that all personnel
servicing the system place their personal LOTO devices (lock and tag) on the A1 Panel or Main
Disconnect Panel as shown in Figure 1-1.
Figure 1-1: A1 Disconnect Panel with LOTO Applied
Note: The electrical panel may look different, but the process is the same. The handle of the electrical
panel will have a means of locking it in place after the handle is placed in the Off position.
5.) Wait 5 minutes for any stored energy in capacitors to dissipate.
6.) Verify that all energy was dissipated as follows:
• Take the top and front cover off the PDU.
• Measure incoming system power at TS1 (for NGPDU) or the Input Power Panel (for CPDU).
• Measure each phase to ground and verify zero potential.
7.) Service/repair the CT system per service instructions.
1.5.2.2 Restoring Power to the System
1.) Notify affected personnel that equipment will be re-energized and LOTO devices removed.
2.) Make sure all service personnel remove their personal LOTO devices from the A1 Panel or
Main Disconnect Panel.
3.) Re-apply power to the PDU cabinet.
4.) Reset the Gantry drives by pushing the reset button on any of the control panels.
5.) Bring the system software back up.