Lenovo Neptune DWC RM100

Questions and Answers:

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eric18Aug 30, 2025
How to resolve secondary over pressure alarm on Lenovo Neptune DWC RM100?
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  Crystal RaymondAug 30, 2025
  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.
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Paul HutchinsonAug 23, 2025
How to troubleshoot no display on Lenovo Server?
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  Cheryl BeckAug 25, 2025
  If there is no display on your Lenovo Server, it could be due to a power failure on the display board or controller I/O board. Open the upper electrical panel door to check that 24v DC is available at the controller I/O board. If there are no LEDs showing on the processor board then check I/O board 24v fuse FS1. If LEDs are on, check for wiring faults between the I/O board and the display.
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Bill KramerAug 31, 2025
What to check if there is no primary water flow in Lenovo Neptune DWC RM100?
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  Ashley CookSep 1, 2025
  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.
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David WilliamsSep 1, 2025
What causes Pump 1 fault in Lenovo Neptune DWC RM100?
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  Don RoseSep 1, 2025
  A Pump 1 fault in your Lenovo Server indicates that Pump 1 is drawing excessive current, or the speed controller has been subjected to over/under voltage. Replace Pump 1.
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James JonesSep 2, 2025
How to fix pump 2 fault on Lenovo Server?
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  Laura GuerreroSep 2, 2025
  A Pump 2 fault on your Lenovo Server means that Pump 2 is drawing excessive current, or the speed controller has been subjected to over/under voltage. Replace Pump 2.
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jason19Sep 3, 2025
What to do for Micro SD Card Fault in Lenovo Neptune DWC RM100?
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  ohardySep 3, 2025
  A Micro SD Card Fault in your Lenovo Server means the SD card has either been removed or physically damaged. Replace the SD card.
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Andre SmithSep 3, 2025
How to resolve secondary filter dirty alert on Lenovo Neptune DWC RM100?
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  ebrownSep 3, 2025
  The 'Secondary Filter Dirty' alert on your Lenovo Server indicates that the differential pressure across the Secondary filter is greater than 0.2Bar (3PSI), suggesting that the filter should be cleaned. Clean the filter screen as described in the Maintenance Section.
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sallywilliamsSep 4, 2025
What does illegal water sensor condition mean for Lenovo Neptune DWC RM100 Server?
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  Lynn LoveSep 4, 2025
  An illegal water sensor condition on your Lenovo Server means that on initial start-up, fill pressure has been achieved, but the level sensor is not made. Replace the level sensor/s.
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Mary MilesSep 5, 2025
What to do if Lenovo Neptune DWC RM100 Server detects water (internal leak)?
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  awestSep 5, 2025
  If your Lenovo Server detects water, indicating an internal leak, it means the leak tape in the unit drip tray has detected a substantial water leak. Identify and repair the leak.
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Angela SolisSep 6, 2025
How to troubleshoot Pump 1 Communications Fault on Lenovo Neptune DWC RM100?
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  Lauren ThompsonSep 6, 2025
  A Pump 1 Communications Fault on your Lenovo Server indicates that the controller is unable to communicate with the Pump 1 speed controller. Check all cables & connections. Replace pump.

Lenovo Neptune DWC RM100 Specifications

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