• SIGNA™ Hero 3.0T Service Methods
  • 5852800-8EN Revision 1.0
  • Object ID: 00000018WIA3011B230GYZ
  • Topic ID: id_15667543 Version: 1.9
  • Date: Jul 13, 2021 4:27:36 PM

CCU Replacement

Prerequisites

Table 1. Personnel requirements
Required personsPreliminary requirementsProcedureFinalization
1Not Applicable90 minutes15 minutes
Table 2. Tools and test equipment
ItemQuantityEffectivityPart numberManufacturer
Standard Tool1---
20L Draining Tank3---
Water Hand Pump1---
150MM FUNNEL1---
Ladder1---
Small Plastic Bags (for stopping draining water)2---
Tie Wraps2---
Hoist Service Kit1-

5196226

-
Flexible Water Tank (In System)1-

5342981

-
Table 3. Consumables
ItemQuantityEffectivityPart numberManufacturer
TowelsNA---
Table 4. Replacement parts
ItemQuantityEffectivityPart numberManufacturer
CCU 1-

Refer to FRU Manual

-
Table 5. Safety
Table 6. Required conditions
ConditionReferenceEffectivity

ICC facility water valve will be turned off. Check the hospital facility chiller valve integrity to avoid the excessive loads on the facility water pumps and lines.

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ISC Power must be turned OFF. Refer to Lockout / Tagout for ISC.

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Procedure

  1. Release the bands from the shipping base, flip the slide plate, and slide the FRU Box.
    Figure 1. Slide CCU FRU Box
  2. Open CCU FRU Box, turn the top cover upside down.
    Figure 2. Open CCU FRU Box
  3. Open ICC Cover and remove it.
    Figure 3. Remove Cover
  4. Confirm that ISC power is off and LOTO is performed. Then, check the followings.
    1. GCU/CCU pressure meter (black meter) is at zero.
    2. ICC Control Unit TCU display is OFF.
    Figure 4. Confirmation
  5. Turn off the F50 Power.
    1. Turn off the “Drive Switch”.
    2. Turn off the “Main Power Switch”.
    Figure 5. F50 Power OFF
  6. Shutdown Chiller or open bypass loop per hospital facility chiller valve integrity.
  7. Turn OFF the supply and return valves for Facility Water in FPU.
    Figure 6. Turn off valves for facility water
  8. Drain the supply water to release the water pressure per following steps.
    1. Connect the hose to drain port of water supply.
    2. Insert the other side of hose into the flexible tank.
    3. Open valve and check that the pressure meter becomes zero.
    4. Close the valve and remove the hose.
    Figure 7. Drain the supply water
  9. Drain the coolant in CCU Tank.
    1. Unscrew the cap from the CCU tank.
    2. Prepare two 20L Draining Tanks and draining hose with L connector.
    3. Insert L connector to the tank draining nipple. The valve inside will open auto-matically by connecting the mating connector and draining will start.
    4. When the coolant fills Tank to half full (about 4 minutes), remove the L connector once and replace the Tank. Then, connect the L connector to nipple to restart the draining.
    5. Wait until the draining stops from the hose. (Total time about 10 minutes for two tanks).
    Figure 8. Draining for the Tank
  10. Drain the coolant in CCU Pump.
    1. Prepare 20L Draining Tank and draining hose with coupling nut.
    2. Connect the hose connector to the pump draining nipple.
    3. Open the valve and draining will start.
    4. Wait until the draining stops from the hose. (Minimal coolant in the pump.)
    5. Close the valve which is opened in step c.
    Figure 9. Draining for the Pump
  11. Prepare funnel and empty tank as per following illustration Then, disconnect the Green and RED hoses from CCU using 38 mm wrench.
    Note: These connectors are not auto-shout off connector. See the following illustration for the release direction.
    Figure 10. ISC Coolant Hoses
  12. Once the hose connector becomes loose, hold empty draining tank by one hand and loosen the connector by another hand to catch the remaining coolant in the hose until the coolant flow changes to drip.
    Note: Please note that coolant may come out vigorously, especially for the red hose. Be careful.
  13. Then, cover the hoses with plastic bags with tie wraps.
    Figure 11. Remaining coolant in the hose
  14. Disconnect the Blue Quick Disconnect hoses of CCU.
    Note: When disconnecting the Blue Quick Disconnect hoses, disconnect quickly to avoid excessive spilling of coolant

    Figure 12. Quick Disconnect Hoses
  15. Disconnect 1X1, 1X11, 3X1, 4X11 Cables from Control Unit.
    Figure 13. Cables at Control Unit
  16. Setup Hoist. Refer to Hoist Setup
    Figure 14. Hoist Setup
  17. Set FRU Box Top Cover in front of ICC as Figure 15.
  18. Loosen four screws and carefully withdraw CCU from the chassis.
    Note: If CCU slide lock is on, slide down to unlock
    Figure 15. Withdraw CCU
  19. Attach the lifting brackets to both sides of the CCU. The lifting brackets can be found in the CCU FRU crate.
    Figure 16. Lifting Brackets
  20. Hook the winch and spreader bar from the hoist kit to the lifting bracket.
  21. Note: Make sure the hook is seated in the lifting bracket. If not, the weight can shift causing harm to the equipment or engineer.
    Ratchet the winch to tighten the chain.
    Figure 17. Ratchet
  22. Press the release tabs in on each side and remove the 2nd slide rail from 1st slide rail on CCU.
    Figure 18. Push slides
  23. Push the rail slider into the cabinet before lowering CCU.
  24. Use the hoist and slowly lower the CCU Chassis to the top FRU Box.
    Figure 19. Lower CCU
  25. Remove the slide rails from CCU.
    Figure 20. Remove slide rails
  26. Slightly lift up the CCU, rotate the FRU top cover by 90 degree, and lower the CCU into the FRU Box.
    Figure 21. CCU into the FRU Box
  27. Remove lifting brackets and attach them to the top of new CCU.
  28. Move the new FRU in front of ICC.
  29. Using Hoist, slightly lift up new FRU, rotate the box by 90 degree, and install slide rails.
  30. Restore the CCU by reverse order of removal.
  31. Remove plastic bags and restore all hoses.
    Note: Hold the towel under the hose when restoring the hoses.
  32. Restore all cables.
  33. Open valve for Facility water.
    Figure 22. Open Valve
  34. Restart Chiller or close bypass loop for ICC facility water supply per hospital facility chiller valve integrity.
  35. Transfer the coolant to the other empty tank using funnel about 3~4L (1 gallon or so) for one hand operation.
    Figure 23. Transfer Coolant
  36. Turn OFF the following sub breakers at ISC PDU in following order for safe refill operation.
    1. RF Amp OFF (First rotation of refill only. Skip from second rotation.)
    2. Gradient OFF (First rotation of refill only. Skip from second rotation.)
    3. System Cooling OFF.
    Figure 24. Turn OFF sub breakers
  37. Remove LOTO. Refer to Section 4.5 in Removing LOTO - ISC. (First rotation of refill only. Skip from second rotation.)
  38. Refill the coolant per following steps.
    1. Remove cap of CCU tank. Then, insert the tank funnel extension and funnel into the opening on top of the tank. (For first rotation of refill only. Skip from second rotation.)
    2. Pour the coolant into the funnel to fill the tank so that it will be within green level.
      Note: Use ladder for CCU refill.
      Note: Use the tank with 3~4 L (1 gallon) coolant for refill. If it becomes empty, refill the coolant.
    3. Turn on the “System Cooling” sub breaker at ISC.
    4. Wait for about 30 seconds and check the following conditions. If not, continue from Step 35 to Step 38.
      Note: Water level in the tank will reduce after the first several pump operations and coolant can be refilled.

      Confirm the following bullets

      • No leakage at hose connections.

      • Indicator “5” of TCU is shown.

      • CCU pressure meter is in between 4.5 and 6.9 bar.

      • All drained coolant is restored into the tank.

    5. (For ICC with vent valve with transparent hose Only) With the CCU operating, place the plastic bag under transparent hose.
      Note: Vent valve with transparent hose is removed from GCU/CCU after end of Q4, 2017 per VCP with engineering analysis. No operation is needed if not exist.

      Then, turn the vent valve using square section key by 3 turns and wait for 10 seconds.

      Then, close the venting valve. By doing this, the air bubbles in the pump are vented away.

      Note: There is a case that nothing comes out from the transparent hose
    6. Remove funnel and extender. Then, restore cap to CCU
    Figure 25. Refill
  39. Turn on the “Gradient” and “RF Amp” sub breaker at ISC.
  40. Turn on F-50 power.
    1. Turn on the “Main Power Switch”.
    2. Turn on the “Drive Switch”.
  41. Check that CCU is correctly running and there is no leakage from hoses connected to CCU.

Finalization

  1. Perform check scan.
  2. Disassemble the hoist kit and restore it to the stored location.
  3. Package the FRU Box crate including the defective part and return.