ENGLISH
7 Troubleshooting
TOEP C710606 27 J1000 Quick Start Guide
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7
Troubleshooting
General Fault and Alarms
Faults and alarms indicate problems in the drive or in the machine.
An alarm is indicated by a code on the data display and the flashing ALM LED. The drive
output is not necessarily switched off.
A fault is indicated by a code on the data display and the ALM LED is on. The drive output
is always switched off immediately and the motor coast to stop.
To remove an alarm or reset a fault, trace the cause, remove it and reset the drive by pushing
the Reset key on the operator or cycling the power supply.
This lists up the most important alarms and faults only. Please refer to the instruction manual
for a complete list.
LED Display ALM FLT
Cause
Base Block
The software base block function is assigned to one of the digital inputs and the input is
off. The drive does not accept Run commands.
Control Circuit
Fault
There is a problem in the drive’s control circuit.
Cannot Reset
Fault reset was input when a run command was active.
Option
External Fault
An external fault was tripped by the upper controller via an option unit.
External Fault
A forward and reverse command were input simultaneously for longer than 500 ms.
This alarm stops a running motor.
External Faults
• An external fault was triggered by an external device via one of the digital inputs S1
to S5.
• The digital inputs are set up incorrectly.
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.
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