If you're still unsure or uncomfortable with performing manual fixes, consider contacting Vertiv support or a certified UPS technician for assistance.
: Check for blocked fan filters or high ambient room temperature (ideally 0–40°C). Mains/Rectifier Issues : liebert hipulse d ups manual fix
The unit contains internal capacitors that store energy even after disconnection. Wait at least five minutes after shut down before opening the cabinet. Multi-Source Power: If you're still unsure or uncomfortable with performing
Power down the fan tray assemblies (if safe to do so) or inspect them visually. liebert hipulse d ups manual fix
If the repair requires opening the cabinet, the load must be transferred to maintenance bypass.
Follow the specific sequence shown on the cabinet door to close the Maintenance Switch (Q3).
When performing a Liebert Hipulse D UPS manual fix: