7 Troubleshooting ENGLISH or or I80E-EN J1000 Quick Start Guide 25 isplay ALM FLT Cause sink heat r • Surrounding temperature is too high. • The cooling fan has stopped. • The heatsink is dirty. • The airflow to the heatsink is restricted. tor load • The motor load is too heavy. • The motor is operated at low speed with heavy load. • Cycle times of accel./ decel. are too short. • Incorrect motor rated current has been set. ve load • The load is too heavy. • The drive capacity is too small. • Too much torque at low speed. C oltage DC bus voltage rose too high. • The deceleration time is too short. • Stall prevention is disabled.
• Braking chopper/ resistor broken • Too high input voltage. Phase ss • Input voltage drop or phase imbalance. • One of the input phase is lost. • Loose wires at the drive input. C oltage The voltage in the DC bus fell below the undervoltage detection level. • The power supply failed or one input phase has been lost. • The power supply is too weak. harge t Fault The charge circuit for the DC bus is broken.