Remove the Lenovo Neptune(TM) 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 leakage 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 T20 head screwdriver	Torx T20 screw

Procedure

1. To remove the quick connect plugs from the manifolds, see Remove the manifold (in-rack system) or Remove the manifold (in-row system).
2. To remove the server from the rack, see Remove the server from rack.
3. Remove the top cover. See Remove the top cover.
4. Disconnect the liquid detection sensor module cable of the DWCM from the connector on the system board assembly. See Direct water cooling module.
5. Remove the hose holder cover.
   Figure 1. Removing the holder cover
   
   
   1. Loosen the two screws from the cover.
   2. Pull the cover backwards to disengage it from the holder.
6. Disengage the hoses and liquid detection sensor module.
   Figure 2. Disengaging the hoses and module
   
   
   1. Push the holder latches to both sides to unlock the module.
   2. Disengage the hoses and module from the hose holder.
7. Remove the DWCM from the processor board.
   Figure 3. Removing the DWCM
   
   
   1. Fully loosen all the screws in the removal sequence shown on the cold plate assembly.
   2. Carefully lift the DWCM from the processor socket.
8. If there is any old thermal grease on the four GPUs and the cold plates, gently clean the top of the four GPUs and the cold plates with an alcohol cleaning pad.
9. If you are replacing a processor, remove the processor. See Remove a processor.
10. Remove the hose holder.
    Figure 4. Removing the holder
    
    
    1. Loosen the screw that locks the holder to the processor board.
    2. Lift the holder out of the chassis.
    3. Re-install the screw back to the processor board.