Liquid Cooling Low Level

What does LC Level mean?

This fault indicates that the liquid cooling system has detected a low coolant level. This is critical for drives utilizing liquid cooling to dissipate heat from power components. Insufficient coolant can lead to rapid overheating of the VSD's power components, as heat cannot be effectively transferred away. If left unaddressed, it risks severe internal damage or complete failure of the drive due to thermal stress.

• Leakage in the liquid cooling system (e.g., hoses, connections, pump seals, cold plates, radiator).
• Insufficient coolant fill level or air trapped in the cooling circuit during initial setup or maintenance.
• Failure or malfunction of the liquid level sensor (e.g., float switch, conductivity sensor).
• Evaporation of coolant over time, especially in systems not properly sealed or using incorrect coolant.
• Blockage within the coolant flow path (e.g., clogged filter, pump failure, internal cold plate obstruction).

Click steps to track your progress.

1. 1

   Visually inspect all visible hoses, connections, cooling plates, pump, and radiator for signs of coolant leaks.

2. 2

   Refill the coolant reservoir to the specified level (e.g., indicated by sight glass or fill marks). Follow manufacturer's air purging procedure.

3. 3

   Test the liquid level sensor by manually actuating it (if accessible) or by verifying its electrical state (e.g., continuity, voltage output) at different levels.

4. 4

   Verify the type and concentration of coolant used. Replace with specified industrial coolant (e.g., deionized water + glycol mixture) if incorrect.

5. 5

   Check liquid cooling system filters for blockage. Measure coolant flow rate or pressure drop across critical components if instrumentation is present.