7 Troubleshooting
28 I67E-EN V1000 Quick Start Guide
Safe Disable
Fault
Drive output is disabled while only one of the Safe Disable inputs is open. (normally
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.
Output Phase
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).
Overcurrent
• 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.
Heatsink
Overheat
• Surrounding temperature is too high.
• The cooling fan has stopped.
• The heatsink is dirty.
• The airflow to the heatsink is restricted.
Motor
Overload
• 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.
Drive
Overload
• The load is too heavy.
• The drive capacity is too small.
• Too much torque at low speed.
DC
Overvoltage
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 Phase
Loss
• Input voltage drop or phase imbalance.
• One of the input phase is lost.
• Loose wires at the drive input.
Braking
Transistor
Fault
The internal braking transistor is broken.
Fault Reset
During Run
Fault reset was input when a run command was active.
DC
Undervoltage
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.
LED Display ALM FLT Cause
or
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