Remove the Lenovo Neptune(TM) Liquid to Air Module

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

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 systems.

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. To remove the server from the rack, see Remove the server from the rack.
2. Remove the top cover. See Remove the top cover.
3. Remove the system fan 5 from the fan module.
   
   

   

   
   
4. Disconnect the Pump 1 cable of the L2AM from the connector on the system board assembly. See Liquid to air module.
5. Re-install the system fan 5 into the fan module.
   
   

   

   
   
   1. Align the four corners of the fan to fan module socket and put it down.
   2. Press the fan latch down to ensure that it is plugged in the connector.
6. Disconnect the leak detection cable from the processor board, and route it out of the cable clips on the leakage detection sensor module holder.
   
   

   

   
   
7. Re-install the handle to the L2AM.
   
   

   

   
   
   1. Place the module handle (L2AM heat sink bracket) evenly on the L2AM and align screw holes.
   2. Tighten the screws. Ensure that the screws are secured in place.
8. Disengage the L2AM from processors.
   
   

   

   
   
   1. Fully loosen the Torx T30 nuts on the cold plate assembly and radiator.
   2. Rotate the anti-tilt wire bails inward.
   3. Carefully lift the L2AM from the processor sockets by the module handle (L2AM heat sink bracket). If the L2AM cannot be fully lifted out of the socket, further loosen the Torx T30 nuts and try lifting the L2AM again.
9. Place the L2AM on the shipping tray.
10. 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.
11. Separate the processor from the L2AM. Refer to Separate the processor from carrier and heat sink.