The inverter is overheating or overloaded.
Hipulse D UPS Technical Specifications | PDF | Power Inverter
BATTERY: E.O.D. (End of Discharge)
This procedure should be followed after the root cause of a fault (e.g., overload, overtemperature) has been resolved.
He turned to Section 6: Troubleshooting & Alarms. Under "Phase Rotation Error," it didn’t say "swap wires." Instead, it showed a small table: liebert hipulse d ups manual fix
Isolate the UPS output and clear the fault on the critical load. Check for failed components (IGBTs) if the fault persists.
Measure the incoming voltage at the main input terminal block ( ). Ensure all phases are balanced. The inverter is overheating or overloaded
If the unit allows, initiate a "Soft Start" from the control panel to allow the DC bus to stabilize. B. Resolving "Input Switch Open" or "Input UV/OV"
Check the input main breaker at your facility's distribution panel to ensure power is feeding the UPS. He turned to Section 6: Troubleshooting & Alarms
| Possible Cause | Corrective Action | |---|---| | Utility phase sequence changed | Verify upstream supply – restore original sequence | | | Perform "Reset Phase Reference" via Service Menu → Calibration → Phase Lock |
The Liebert Hipulse D is a high-performance, true on-line, double-conversion UPS (Uninterruptible Power Supply), typically found protecting data centers, industrial processes, and critical healthcare equipment. Rated from 80 kVA up to 800 kVA, it is renowned for its robustness and its ability to handle highly non-linear loads.