Liquid cooling module problems (Compute Complex Neptune Core Module)

Use this information to resolve problems with the Compute Complex Neptune Core Module.

Liquid leak problem

Liquid leaks can be identified through the following practices:

If the server is on remote maintenance,
- A Lenovo XClarity Controller event shows:
  FQXSPCA0040N: Liquid is leaking from open loop [CoolingSensorName].
- Lenovo XClarity Controller has defined lots of system conditions as IPMI sensors. Users can use IPMI commands to check system running status. Here are examples of executing ipmitool, an open-source common tool which follows Intel’s IPMI standard. Check for liquid leakage status with command lines as shown.
  - The event logs shown with the parameter:
```
sel elist
```
  - Liquid Leak ׀ EAh ׀ ok ׀ 30.1 ׀ Transition to Critical from less severe
    If liquid leakage happens, the log above will show up. The status of all sensors can be fetched with the parameter:
```
sdr elist
```
If the server is within reach, and the amber LED is lit on the front operator panel, potential liquid leaks may have occurred. It is required to open the top cover to check the LED status of the leakage detection sensor module. See Front-operator-panel LEDs and buttons and LED on the leakage detection sensor module for more details.

Steps to resolve liquid leaks

If the LED on the leakage detection sensor module is blinking green, follow the procedures to get help.

Save and back up data and operations.
Power off the server and remove the quick connect plugs from the manifolds.
Slide the server out or remove the server from the rack. See Install the server to the rack (friction rails) or Install the server to the rack (slide rails).
Remove the top cover. See Remove the top cover.
Check 1 to 9 leak-prone areas around the outlet and inlet hoses, system board assembly. If liquid found around the hoses and system board assembly, clean up the liquid.
Figure 1. Leak-prone areas
Check for the top cover of the server below to see if dripping happens. If yes, repeat previous steps to servers below.
Contact Lenovo Support.

A Lenovo XClarity Controller event shows:

FQXSPCA0042M: Liquid leak detector for [DeviceType] is faulty.

Step to resolve cable break

Contact Lenovo Support for detail checking.

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