For the other 80% of faults—phase errors, false SCR shorts, frozen screens, and PLL sync issues—the manual fixes detailed above will restore your Hipulse D to service. Always remember: the manual is a guide, but field experience is the real fix. Keep a digital copy of the Service Manual (Section 6: Troubleshooting) on your phone, and never reset an alarm without verifying the source.
If configuration is lost after battery replacement or board swap: liebert hipulse d ups manual fix
Check if the input voltage is within the acceptable window. If the voltage is stable but the alarm persists, check for a blown input fuse or an open input switch. Battery Faults For the other 80% of faults—phase errors, false
Ensure all three phases of the input power are stable. If configuration is lost after battery replacement or
Wait for the LCD display to go blank (ensure capacitors are discharged). 4. Maintenance and Best Practices Go to product viewer dialog for this item.
If the UPS requires internal hardware replacement, you must transfer the load to the maintenance bypass without dropping power to your critical infrastructure.
If a battery test fails, check the autonomy time settings in the service menu. If the test continues to fail after a deep discharge, the battery may need replacement. Bypass for Service: To safely work on the unit, switch to Maintenance Bypass