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YASKAWA ELECTRIC
TOEP C710656 09D YASKAWA Power Regenerative Unit - R1000 Quick Start Guide
8 Troubleshooting
8
Troubleshooting
General Fault and Alarms
Faults and alarms indicate problems in the regenerative unit or in the machine.
An alarm is indicated by a code on the data display and the flashing ALM LED. The output is not necessarily switched
off.
A fault is indicated by a code on the data display and the ALM LED is on. The 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 regenerative unit 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 Technical Manual for a complete list.
Digital Operator AL FL
Cause
Corrective Action
Power Supply
Overvoltage
The input power supply voltage is too
high.
Reduce the voltage to within the range in the power supply
specifications.
Power Supply
Undervoltage
The capacity of the power supply is too
small.
Increase the capacity of the power supply.
The AC fuse burned out.
A transistor inside the regenerative unit was destroyed.
The input wiring is ground-faulted or short-circuited. Or, the drive
output is ground-faulted or short-circuited, which destroyed the output
transistor.
Consult with your Yaskawa representative or the nearest Yaskawa
sales office.
The distortion in the power supply is too
large.
Lower the impedance of the input power supply wiring.
A phase loss occurred in the input power
supply.
Check the input power supply for phase loss or an imbalance in the
interphase voltages. Investigate and correct the cause and reset the
fault.
Baseblock
–
External baseblock signal was entered via
one of the multi-function input terminals
(S1 to S8).
Check external sequence and baseblock signal input timing.
The CE detection time (H5-09) is set
shorter than the time required for a
communication cycle to take place.
• Check the PLC.
Change the software settings in the PLC.
• Set a longer CE detection time using parameter H5-09.
Incompatible PLC software settings or
there is a hardware problem.
Check the PLC.
Remove the cause of the error on the controller side.
Communications cable is disconnected or
damaged.
Check the connector to make sure the cable has a signal.
Replace the communications cable.
Current Offset Fault
An error occurred in the power supply
detection circuit.
Cycle the power supply and check operation.
If the fault occurs again, replace the board or regenerative unit. For
information on board replacement, consult with your Yaskawa
representative or the nearest Yaskawa sales office.
Control Circuit
Error
–
There is a self-diagnostic error in the
control circuit.
Cycle power to the regenerative unit.
If the problem continues, replace the control board or the entire
regenerative unit. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
Connector on the operator is damaged.
Replace the operator.
A/D Conversion Error
–
Control circuit is damaged.
Cycle power to the regenerative unit.
If the problem continues, replace the control board or the entire
regenerative unit. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
Aov
AUv
bb
CoF
CPF00 to CPF45
CPF02
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