YASKAWA V1000 Quick Start Manual page 98

5.3 Alarm Detection
UL3
UL4
Uv
98
Undertorque Detection 1
Drive output current (or torque in OLV) less than L6-02 for longer than L6-03 time.
Undertorque Detection 2
Drive output current (or torque in OLV) less than L6-05 for longer than L6-06 time.
Undervoltage
• One of the following conditions was true when the drive was stopped and a run
command was entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the drive was open.
• Low voltage in the control drive input power. This alarm outputs only if L2-01 is
not 0 and DC bus voltage is under L2-05.
YASKAWA ELECTRIC TOEP C710606 14A YASKAWA AC Drive - V1000 Quick Start Guide