• Object ID: 00000018WIA301C0F80GYZ
  • Topic ID: id_40021748 Version: 1.4
  • Date: Jul 26, 2022 11:54:46 AM

Extended shutdown

About this task

Use these steps to execute an extended power shut down once the computer has successfully shutdown and the computer power is off.

Important: The equipment room is typically used by service engineers to service the equipment. Use caution when inside the equipment room.
Important: Do NOT open any GE MRI System Cabinets or protective covers. There are dangerous high voltages within the cabinets. There are several Cabinets and components within the equipment room used by the GE MRI System.

The Main Disconnect Panel (MDP) is the in-coming Power for the MRI compressor in the Integrated Cooling Cabinet (ICC). Do NOT turn off power to this component. It must remain on to keep the helium at the proper temperature to maintain correct magnet pressure.

Step-by-step instructions

  1. Confirm that the computer is turned off.
  2. From the ISC cabinet complete the following:
    1. Open the small access door (1) to view the Main Breaker.
    2. Move the breaker to the horizontal position (2).
      • Only the ISC is turned off. The ISC cabinet contains the Power Distribution Unit (PDU) for the MRI System. It results in noise as the relays and switches open.
      • Sumitomo compressor and coldhead remain on.
        Figure 1. Example of: ISC cabinet
        Table 1. Image legend
        NumberDescription
        1ISC cabinet
        2Breaker in off position, fully horizontal.
      Note: To restart the system, follow the steps in Startup from an extended shutdown. Wait 60 minutes after the startup before you start to scan. Not waiting the 60 minutes could impact image quality.