YASKAWA Servopack CACR-SR Series

Fault Codes
LED Detection Lighting Condition Probable Cause Corrective Action
Goes ON when power is supplied to the
control circuit.
* Defective control circuit board (1PWB) Check 1PWB
Goes ON when power is supplied to the
main circuit and servo power is turned
ON.
* Defective current feedback circuit. * Check the PTM
* Defective main circuit transistor
module.
* Check the current transformer DCCT.
* Check grounding
Over * MCCB does not trip * Motor Grounding.
1 Current
Goes ON when power is supplied to the
main circuit and servo power is turned
ON.
* Defective motor grounding * Check the PTM.
* Defective main circuit transistor
module.
* Check the grounding.
* MCCB does not trip
Goes ON when power is supplied to the
main circuit.
* Defective main circuit transistor
module.
* Check the PTM.
Goes ON when the motor accelerates or
decelerates.
* Incomplete (1PWB) VR8 adjustment. * Check 1PWB
Goes ON when power is supplied to the
control circuit.
* Defective control circuit board (1PWB)
* Check Thyristor.
Circuit
2 protector
Goes ON when power is supplied to the
main circuit.
* Defective main circuit Thyristor-diode
module
tripped
* MCCB trips.
Goes ON during operation. * Defective main circuit
Goes ON when power is supplied to the
control circuit.
* Defective regenerative transistor. * Check Regen transistor and resistor.
Regenera- * Regenerative resistor disconnection.
3 tive
Goes on approximately 0.5 to 1 second
after power is supplied to the main
circuit.
* No regenerative resistor connection
(SR60BB)
trouble
Goes ON when the motor accelerates or
decelerates.
* Load inertia JI (GD^2) is too large.
* Check the inertia of the machine with
the value converted to the motor shaft.
4 Over-
voltage * Defective regenerative circuit. * Check Regen transistor and resistor.
When the reference is input, the motor
runs fast and 5 goes on.
* Motor connection error. * Correct motor connection.
5 Over- * Optical encoder connection error.
* Check pulses in phases A, B, C, U, V,
and W on 2CN, and correct wiring.
speed
* The reference input voltage is too large.
* Decrease the reference input voltage.
6 Voltage
Goes ON when power is supplied to the
main circuit.
* Defective main circuit Thyristor-diode
module.
* Check the Thyristor.
drop
3
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