YASKAWA T1000A User Manual

6.4 Fault Detection
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 277
Troubleshooting
6
6.4 Fault Detection
u Fault Displays, Causes, and Possible Solutions
Faults are detected for drive protection, and cause the drive to stop. When a fault occurs, the fault output terminal MA-
MB-MC is triggered. Faults have to be cleared manually after removing the cause to start running the drive again.
Table 6.14 Detailed Fault Displays, Causes, and Possible Solutions
Digital Operator Display Fault Name
boL
Braking Transistor Overload Fault
The braking transistor has reached its overload level.
Cause Possible Solution
The wrong braking resistor is installed. Select the optimal braking resistor.
Digital Operator Display Fault Name
bUS
Option Communication Error
• After establishing initial communication, the connection was lost.
• Only detected when the run command frequency reference is assigned to an option card.
Cause Possible Solution
No signal received from the PLC. • Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Faulty communications wiring or a short circuit exists.
A communications data error occurred due to noise.
• Check the various options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit, main circuit, and ground wiring.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors if necessary.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or on the drive input power side.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.
The option card is damaged. Replace the option card if there are no problems with the wiring and the error continues to occur.
The option card is not properly connected to the drive.
• The connector pins on the option card are not properly lined up with the connector pins on the drive.
• Reinstall the option card.
Digital Operator Display Fault Name
CE
MEMOBUS/Modbus Communication Error
Control data was not received for the CE detection time set to H5-09.
Cause Possible Solution
Faulty communications wiring or a short circuit exists.
• Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits. Repair as needed.
Communication data error occurred due to noise.
• Check the various options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or on the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise and use surge suppressors if required.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.
Digital Operator Display Fault Name
CF
Control Fault
A torque limit was reached continuously for three seconds or longer while ramping to stop in Open Loop Vector Control.
Cause Possible Solution
Motor parameters are not set properly. Check the motor parameter settings and repeat Auto-Tuning.
Torque limit is too low. Set the torque limit to the most appropriate setting (L7-01 through L7-04).
Load inertia is too big.
• Adjust the deceleration time (C1-02, -04, -06, -08).
• Set the frequency to the minimum value and interrupt the Run command when the drive finishes decelerating.
Digital Operator Display Fault Name
or
<1>
CPF00 or CPF01
Control Circuit Error
Cause Possible Solution
There is a self diagnostic error in control circuit.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Connector on the operator is damaged. • Replace the operator.
Digital Operator Display Fault Name
CPF02
A/D Conversion Error
An A/D conversion error or control circuit error occurred.
Cause Possible Solution
Control circuit is damaged.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.

YASKAWA T1000A Specifications

General

Brand	YASKAWA
Model	T1000A
Category	Controller
Language	English