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9
Troubleshooting
General Fault and Alarms
Faults and alarms indicate problems in the converter 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 converter 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
Power Supply
Overvoltage
Aov
Power Supply
Undervoltage
AUv
Baseblock
–
bb
Current Offset Fault
CoF
Control Circuit
Error
<1>
–
CPF00 to CPF35
A/D Conversion Error
– Control circuit is damaged.
CPF02
YASKAWA ELECTRIC TOEP C710656 06E YASKAWA Power Regenerative Converter - D1000 Quick Start Guide
Cause
The input power supply voltage is too
high.
The capacity of the power supply is too
small.
The AC fuse burned out.
The distortion in the power supply is too
large.
A phase loss occurred in the input power
supply.
External baseblock signal was entered via
one of the multi-function input terminals
(S1 to S8).
The CE detection time (H5-09) is set
shorter than the time required for a
communication cycle to take place.
Incompatible PLC software settings or
there is a hardware problem.
Communications cable is disconnected or
damaged.
An error occurred in the power supply
detection circuit.
There is a self-diagnostic error in the
control circuit.
Connector on the operator is damaged.
Corrective Action
Reduce the voltage to within the range in the power supply
specifications.
Increase the capacity of the power supply.
A transistor inside the converter 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.
Lower the impedance of the input power supply wiring.
Check the input power supply for phase loss or an imbalance in the
interphase voltages. Investigate and correct the cause and reset the
fault.
Check external sequence and baseblock signal input timing.
• Check the PLC.
Change the software settings in the PLC.
• Set a longer CE detection time using parameter H5-09.
Check the PLC.
Remove the cause of the error on the controller side.
Check the connector to make sure the cable has a signal.
Replace the communications cable.
Cycle the power supply and check operation.
If the fault occurs again, replace the board or converter. For
information on board replacement, consult with your Yaskawa
representative or the nearest Yaskawa sales office.
Cycle power to the converter.
If the problem continues, replace the control board or the entire
converter. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
Replace the operator.
Cycle power to the converter.
If the problem continues, replace the control board or the entire
converter. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
9 Troubleshooting
43
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