Remove the Lenovo Neptune Liquid to Air Module

Follow instructions in this section to remove the L2AM (The Lenovo Neptune Liquid to Air Module).

About this task

Safety information for liquid detection sensor module cable

S011

CAUTION

Sharp edges, corners, or joints nearby.

Attention

• Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

• Power off the server and peripheral devices and disconnect the power cords and all external cables. See Power off the server.

• If the server is installed in a rack, slide the server out on its rack slide rails to gain access to the top cover, or remove the server from the rack. See Remove the server from rack.

Prepare the following screwdrivers to ensure to install and remove the corresponding screws properly.

Torque screwdriver type list	Screw Type
Torx T20 screwdriver	Torx T20 screw
Phillips 2 screwdriver	Phillips 2 screw

CAUTION

Ensure that the module handle (LACM heat sink bracket) is installed when removing or installing the L2AM. Do not touch the radiator fins. Touching the radiator fins might damage the L2AM.

Procedure

1. Remove the top cover. See Remove the top cover.
2. Disconnect the pump cable and leak detection cable of the LACM module from the connector on the processor board. See The Lenovo Neptune Liquid to Air Module.
   Note

   • If you need to disconnect cables from the system board assembly, disengage all latches or release tabs on cable connectors first. Failing to release the tab before removing the cables will damage the cable sockets on the system board assembly. Any damage to the cable sockets might require replacing the system board assembly.

   • The connectors on your system board assembly might look different from those in the illustration, but the removal procedure is the same.

     1. Press the release tab to release the connector.

     2. Disengage the connector from the cable socket.

   Figure 1. Disconnecting cables from the processor board
   

   

   
   
3. Disconnect the leak detection cable from the processor board, and route it out of the cable clips on the liquid detection sensor module holder.
   
   
   

   Note

   It is advised to disengage the cable connector from the processor board by pulling the safety information label or liquid detection sensor module.
4. Re-install the module handle (LACM heat sink bracket) to the L2AM.
   
   
   
   1. Place the module handle (LACM heat sink bracket) evenly on the L2AM and align screw holes.
   2. Tighten six Torx T20 screws. Ensure that the screws are secured in place.
5. Disengage the LACM from the processor board.
   
   
   
   1. Fully loosen fourteen Torx T20 screws on the cold plate assembly and radiator.
   2. Grasp the middle of the module handle (LACM heat sink bracket) and one of the two T20 screws fastening the radiator to carefully lift the LACM from the processor sockets. If the LACM cannot be fully lifted out of the socket, further loosen the Torx T20 screws and try lifting the LACM again.
6. Place the L2AM upside down on the clean surface.
7. If there is any old thermal grease on the processors and the cold plates, gently clean the top of the processors and the cold plates with an alcohol cleaning pad.
8. Optionally, if you do not need to install a new LACM module, do the following:
   1. Remove the radiator tray from the chassis.
      
      

      1. Remove the Phillips 2 screw on the radiator tray.

      2. Move the radiator tray to the left and lift it out of the chassis.

   2. Remove the liquid detection sensor module holder from the chassis.
      
      

      1. Remove the Phillips 2 screw on the liquid detection sensor module holder.

      2. Lift the liquid detection sensor module holder out of the chassis.