Remove the Lenovo Neptune Processor Direct Water Cooling Module

Follow the instructions in this section to remove the Direct Water Cooling Module (DWCM).

Important

This task must be operated by trained technicians that are certified by Lenovo Service. Do not attempt to remove or install the part without proper training and qualification.

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.

• Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static-sensitive components in their static-protective packages until installation, and handling these devices with an electrostatic-discharge wrist strap or other grounding system.

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

Torque screwdriver type list	Screw Type
Torx T30 head screwdriver	Torx T30 screw

Procedure

1. Make preparations for this task.
   1. Remove the quick connect plugs from the manifolds. See Remove the manifold (in-rack system) or Remove the manifold (in-row system).
   2. Remove the server from the rack, see Remove the server from rack.
   3. Remove the top cover. See Remove the top cover.
   4. Remove the air baffle or middle drive cage. See Remove the air baffle or Remove the middle drive cage and drive backplanes.
   5. Disconnect the liquid detection sensor module cable of the DWCM from the connector on the system board assembly. See Direct water cooling module.
      Attention

      To avoid damaging the system board assembly, make sure to follow the instructions in Internal cable routing when disconnecting cables from the system board assembly.
2. Remove the riser cage.

   • 1FH riser cage

     Figure 1. Removing the 1FH riser cage
     

     

     
     

   • 3FH riser cage

     Figure 2. Removing the 3FH riser cage
     

     

     
     
   1. Loosen the screw that secures the riser cage.
   2. Grasp the riser cage by its edges and carefully lift it straight up and off the chassis.
3. Disengage the hoses and liquid detection sensor module.
   Figure 3. Disengaging the hoses and module
   

   

   
   
   1. Lift the liquid detection sensor module up from the hose holder.
   2. Disengage the hoses from the hose holder.
4. Remove the DWCM from the processor board.
   Figure 4. Removing the DWCM
   

   

   
   
   1. Fully loosen the Torx T30 nuts on the cold plate assembly.
   2. Rotate the anti-tilt wire bails inward.
   3. Carefully lift the DWCM from the processor sockets. If the DWCM cannot be fully lifted out of the socket, further loosen the Torx T30 nuts and try lifting the DWCM again.
5. 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.
6. Separate the processor from the DWCM. Refer to Separate the processor from carrier and heat sink.
7. Remove the hose holder.
   Figure 5. Removing the hose holder
   

   

   
   
   1. Loosen the screws that locks the holder to the system I/O board.
   2. Move the blue latch towards the rear of the server.
   3. Lift the hose holder out of the chassis.
   4. Install the screws to secure the firmware and RoT security module if needed.