Omron VZA24P0BAA [29/218] Troubleshooting

Omron VZA20P2BAA [29/218] Troubleshooting
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. (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.
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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