Chapter 10 Troubleshooting
: 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
stabilizing power or using
series transformer.
: Motor error
Potential Cause Checking Method Corrective Actions
Encoder is damaged.
Check the encoder for the damage. Replace the motor.
Encoder is loose. Examine the encoder connector. Install the motor again.
The type of the
servo motor is
incorrect.
Check if the servo drive and servo motor
are not correctly matched for size (power
rating).
Replace the motor.
: Regeneration error
Potential Cause Checking Method Corrective Actions
Regenerative resistor
is not connected or
the value of the
regenerative resistor
is too low.
Check the wiring connection of
regenerative resistor.
Reconnect regenerative
resistor or calculate the value
of the regenerative resistor.
The parameter P1-53
is not set to zero
when the
regenerative resistor
is not in use.
Ensure the parameter P1-53 is set to
zero.
Set the parameter P1-53 to
zero when the regenerative
resistor is not in use.
Parameter setting is
in error
Confirm the parameter settings of P1-
52 and P1-53, and specifications of
regenerative resistor.
Correctly reset parameter
settings and the specifications
of regenerative resistor again.
10-8 Revision January 2011
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales
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