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Chapter 10 Troubleshooting|ASDA-AB Series
Revision January 2009 10-3
10.2 Potential Cause and Corrective Actions
Servo Drive Fault Messages
: Overcurrent
Potential Cause Checking Method Corrective Actions
Short-circuit at drive
output (U, V, W)
1. Check the wiring connections between drive
and motor.
2. Check if the wire is short-circuited.
Repair the short-circuited and avoid
metal conductor being exposed.
Motor wiring error
Check if the wiring steps are all correct when
connecting motor to drive.
Follow the wiring steps in the user
manual to reconnect wiring.
IGBT error Heat sink overheated
Please contact your distributor for
assistance or contact with Delta.
Control parameter
setting error
Check if the setting value exceeds the factory
default setting.
Set the setting back to factory
default setting and then reset and
adjust the parameter setting again.
Control command
setting error
Check if the control input command is unstable
(too much fluctuation).
1. Ensure that input command
frequency is stable (too much
fluctuation).
2. Activate filter function.
: Overvoltage
Potential Cause Checking Method Corrective Actions
The main circuit voltage
has exceeded its
maximum allowable
value.
Use voltmeter to check whether the input
voltage falls within the rated input voltage. (For
voltage specification, please refer to section
11.1 in Chapter11.)
Use correct power supply or
stabilizing power.
Input power error
(Incorrect power input)
Use voltmeter to check whether the input
voltage is within the specified limit.
Use correct power supply or
stabilizing power.
: Undervoltage
Potential Cause Checking Method Corrective Actions
The main circuit voltage
is below its minimum
specified value.
Check whether the wiring of main circuit input
voltage is normal.
Reconfirm voltage wiring.
No input voltage at
main circuit.
Use voltmeter to check whether input voltage at
main circuit is normal.
Reconfirm power switch.
Input power error
(Incorrect power input)
Use voltmeter to check whether the input
voltage is within the specified limit.
Use correct power supply or serial
stabilizing power.
: Z Pulse shift
Potential Cause Checking Method Corrective Actions
Encoder is damage. Check Encoder for the damage. Repair or replace the motor.
Encoder is loose. Examine the Encoder connector. Install the motor again.