What to check if there is no primary water flow in Lenovo Neptune DWC RM100?
No primary water flow in your Lenovo Server will only activate when the Valve Demand is at 100%, the A32 - Secondary Water High Temp alarm and the A30 - Primary High Temp alarms are active. Check that the chiller or facility water supply is operational and fault free.
What should I do if Lenovo Neptune DWC RM100 level sensor detects no water?
If the level sensor is open circuit for more than 1 second, this alarm will be raised. Check that the water make-up container is properly connected (or filling wand is fully immersed, if used). Check the system for leaks.
How to resolve secondary over pressure alarm on Lenovo Neptune DWC RM100?
A secondary over pressure alarm on your Lenovo Server indicates that the pressure at PS3 has increased above the set value of 6Bar (87PSI). The most likely cause will be excessive heat build-up in the system, or a breach between the Primary and Secondary circuits within the plate heat exchanger. Check for High Temp alarms, relieve pressure at the drain point. Remove heat exchanger and replace.
What causes primary water low flow in Lenovo Neptune DWC RM100?
Primary water low flow in your Lenovo Server will only activate when the valve demand is at 100%, and the ‘A25 - Secondary Water High Temp’ alarm is active. Check the operation of the control valve. Check the primary water supply flow rate. Ensure the system heat load does not exceed the RM100 capacity.
Why is secondary water temperature low in my Lenovo Neptune DWC RM100?
Low secondary water temperature in your Lenovo Server indicates that the secondary water temperature has dropped by more than 2°C (4°F) below the set point. Check the operation of the control valve.
What to do if secondary water temperature is too high on Lenovo Server?
If the secondary water temperature in your Lenovo Server has risen by more than 2°C (4°F) above the set point, check the operation of the control valve.
How do I fix a valve fault on my Lenovo Neptune DWC RM100 Server?
A valve fault on your Lenovo Server occurs when the feedback signal from the control valve is more than 10% different from the demand signal. Check the wiring connections to the actuator. Try to set the actuator position using the ‘Auto Overrides’ function. Check the cooling valve demand % and feedback signals.
Why is the primary water temperature low in my Lenovo Neptune DWC RM100 Server?
A low primary water temperature in your Lenovo Server means the primary water temperature has dropped below the default 4°C (40°F) threshold. Check the chilled water supply.
What causes high primary water temperature in Lenovo Neptune DWC RM100?
High primary water temperature in your Lenovo Server occurs when the primary water temperature rises above the default 11°C (52°F) threshold. Check the chilled water supply.
Why does my Lenovo Neptune DWC RM100 shut down due to a leak or insufficient water?
A leak shutdown or insufficient water issue in your Lenovo Server can occur if the level sensor is not activated, the fill pressure hasn't been achieved, and the fill pump has been running for more than 1 minute. Verify that the water make-up container is correctly connected (or the filling wand is fully immersed, if used). Check the system for leaks. Ensure there is no trapped air in the fill pump hoses and the system is fully vented. Confirm that the auto air vents are open.
General| Product Name | Lenovo Neptune DWC RM100 |
|---|---|
| Category | Server |
| Cooling | Direct Water Cooling |
| Server Type | Rack |
| Cooling Technology | Direct Water Cooling |
| Processor Support | Intel Xeon Scalable Processors |
| Power Supply | Redundant Power Supplies |
| Form Factor | 1U Rack |
Conformance to Low Voltage, EMC, and Pressure Equipment directives.
Certification of compliance with EU RoHS Directives for product materials.
Company registration as an ISO 9001:2015 certified entity for Quality Management.
Warnings, cautions, and guidelines for safe operation, handling, and maintenance.
Precautions for high-voltage connections, replacement parts, and responsible waste management.
Basic characteristics and operational purpose of the RM100 Coolant Distribution Unit (CDU).
Identification of key components through front and rear views of the unit.
Overview of the controller, its interface, and navigation through various screens.
Accessing and modifying unit parameters via Setup and Configuration menus.
Advanced operations including service, diagnostics, and calibration procedures.
Automatic operation, circuit control, temperature control loop tuning, and sensor data.
Viewing active alarms, understanding alarm codes, and troubleshooting steps.
Routine cleaning, leak checks, and fluid requirements for primary/secondary circuits.
Scheduled maintenance activities, required tools, and checks.
Procedure for removing, cleaning, and reinstalling the secondary filter unit.
Catalog of available spare parts with part numbers and descriptions for ordering.
Electrical schematics detailing CDU connections, components, and power distribution.
Diagram illustrating the fluid circuit layout and flow paths of the RM100 CDU.
Details on product warranty, after-sales service, and manufacturer contact information.
Guidelines for responsible decommissioning and disposal of the unit according to regulations.
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