7 Troubleshooting 28 I67E-EN V1000 Quick Start Guide LED D isplay ALM FLT Cause Safe D Fa isable ult Drive output is disabled while only one of the Safe Disable inputs is open. (nor- mally both input signals H1 and H2 should be open) • One channel is internally broken and does not switch off, even if the external signal is removed. • Only one channel is switched off by the upper controller. Out Phase put Loss • Output cable is disconnected or the motor winding is damaged. • Loose wires at the drive output. • Motor is too small (less than 5% of drive current). Overc urrent • Short circuit or ground fault on the drive output side • The load is too heavy. • The accel./decel.
times are too short. • Wrong motor data or V/f pattern settings. • A magnetic contactor was switched at the output. Heat Over o sink heat r • Surrounding temperature is too high. • The cooling fan has stopped. • The heatsink is dirty. • The airflow to the heatsink is restricted. Mo Over 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. Dri Over ve load • The load is too heavy. • The drive capacity is too small. • Too much torque at low speed. D Overv C oltage DC bus voltage rose too high. • The deceleration time is too short.
• Stall prevention is disabled1. • Braking chopper / resistor broken. • Unstable motor control in OLV. • Too high input voltage. Input Lo Phase ss • Input voltage drop or phase imbalance. • One of the input phase is lost. • Loose wires at the drive input. Bra Trans Fa king istor ult The internal braking transistor is broken. Fault Durin Reset g Run Fault reset was input when a run command was active. D Underv C oltage The voltage in the DC bus fell below the undervoltage detection level (L2-05). • The power supply failed or one input phase has been lost. • The power supply is too weak.