ServoL7NHVerified · sol.ls-electric.com
L7NH W-01 — W-01 RST_PFAIL
Warning — monitor· AUTO-RESET
CAUSE
Why does it occur?
Main power phase loss / source loss (when configured to warn).
REMEDY · Step by step
How to fix it?
Check the main power supply wiring and voltage.
Do not reset repeatedly before identifying the cause. Repeated resets while ignoring a trip/alarm can cause secondary damage (IGBT failure, motor winding damage, etc.).
SOURCE
Related manual page
Verified · sol.ls-electric.com
Open PDF ↗L7NH Series AC Servo Drive User Manual V1.6 (EN)
p.375