• SIGNA MR355 / SIGNA MR360
  • Service Manual
  • 5856356-3EN Revision 5.0
  • Basic Service Documentation. Copyright General Electric Company.
  • Object ID: 00000018WIA301CEF20GYZ
  • Topic ID: id_13105793 Version: 1.4
  • Date: Jul 5, 2019 10:25:10 PM

XFD-PS

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1Not Applicable120 minutes15 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Standard Tool1---
Ladder1---
Fixed Site Lift Tool Kit1-

46-317266 All Generation

-
Table 3. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
XFD-PS (Refer to Illustrated Parts)1---
Table 4. Safety
Table 5. Required conditions
ConditionReferenceEffectivity

System Power must be turned OFF. Refer to Lockout / Tagout for MDP(Main Disconnect Panel) or Facility PDU.

--

Procedure

  1. Remove L Upper Front Cover. Refer to SC Cover Removal
  2. Turn the SW1 to Discharge on Front .
    Figure 1. Discharge
  3. Drain the coolant.　Refer to Draining Operation before replacing SRFD3, XFA, or XFD-PS.
  4. Disconnect the IN and OUT quick couplers of XFD-PS from the water manifold.
    Figure 2. Water Manifold Socket Order
    Note:

    When disconnecting the quick couplers, move the couplers in parallel not to damage it.

  5. Connect the IN and OUT of quick coupler.
    Figure 3. Water Manifold
  6. Set the Universal Lift Hoist onto SC top.　Refer to Hoist Setup.
  7. Disconnect the two connectors of leak sensor assy.
  8. Remove the cabinet leak sensor assy by loosening 6 screws.
    Figure 4. Remove Leak Sensor
  9. Disconnect the cable from J2 at Control Board and 4 terminal cables.
  10. Loosen 4 screws which are tightening XFD-PS front panel to the chassis.
    Figure 5. Remove Terminal Cover
  11. Note:

    M5 Screws to push out XFD-PS are located at chassis as following illustration.

    Screw two M5 (40mm) screws at the two screw holes to push the XFD-PS to the chassis and gradually slide it out from Cabinet.
    Figure 6. Gradually Slide Out Using Screws
    Note:

    If you cannot withdraw XFD-PS using M5 screw, need to disconnect connector from rear side. Refer to In case connector of XFA or XFD-PS is very tight.

  12. Withdraw XFD-PS from the chassis.
  13. Install hoist brackets to the chassis of XFD-PS with 4 screws. Do not tighten 4 screws of hoist brackets.
    Note:

    Hoist Bracket is stored in FRU box.

    Figure 7. Hoist Brackets Installation
  14. Install the hoist assembly to the hoist brackets of XFD-PS, and tighten 4 screws of hoist brackets. Check that hoist bracket and hoist assembly are installed surely.
  15. Remove the top from the FRU case by releasing the butterfly clamp on each side.

    Locate the top of FRU Box under the XFD-PS.

  16. Using the hoist, apply tension to the lifting chain until the weight of the XFD-PS is supported by the hoist.
  17. Press the release tabs in on each side as you pull the unit out further.
    Figure 8. Hoist Operation of XFD-PS
  18. Push the rail slider into the system cabinet before lowering XFD-PS.
    Note:

    Here is the tips of slider rail operation.

  19. Lift the XFD-PS up slightly to place the top of FRU Box.
  20. Use the hoist and slowly lower the XFD-PS Chassis to the top of FRU box.
  21. Check that no LED is lit from the slit of right panel. If any LED is lit, Switch may be in failure and there exists charge inside of XFD-PS.
    Figure 9. LED Check

    If LED is lit, check the voltage of rear terminal. See Figure 10.

    Figure 10. Rear View of XFD-PS

    If voltage exist, wait until LED is turned OFF before transferring defective XFD-PS. Store it in FRU box and keep it in the safe place.

    At worst case, it will take 1 days to discharge.

    Note:

    EDLC (Super Capacitor in XFD-PS) is safe during discharge state unless the terminal is shorted.

  22. Install XFD-PS by the reverse order of the removal.
    Note:

    Make sure to connect all cables and hoses.

    Note:

    Make sure to close draining valves and open Supply and Return valves.

  23. Be sure to install the hoses to water manifold.
  24. Restore FRU Box as it was.
    Figure 11. FRU Box
  25. Check that the SW1 is at Operation position.
    Figure 12. Operation Position
  26. Remove the two hoist brackets from XFD-PS chassis.
  27. Restore System Cabinet.

Finalization

  1. Restore the Power. Refer to Lockout / Tagout for MDP(Main Disconnect Panel) or Facility PDU .
  2. Refill Coolant. Refer to Refill Coolant after replacement of SRFD3, XFA, or XFD-PS.
  3. Perform Signal to Noise - Head Scan.