5.3 Fault Detection
92
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
Fluctuation occurred in the power supply
voltage.
Check the voltage.
• Correct the voltage so that it is within the range given in the power supply specifications of the
regenerative unit.
• If there is no problem with the main circuit power supply, check the magnetic contactor in the
main circuit for faults.
A power loss occurred.
Improve the power supply.
The main circuit capacitor circuit in the
regenerative unit has deteriorated.
Check the maintenance period for the capacitor in U4-05 (Capacitor Maintenance).
If the value of U4-05 has exceeded 90%, replace the board or the regenerative unit. For
information on board replacement, consult with your Yaskawa representative or the nearest
Yaskawa sales office.
The operation of the relay or contactor in the
inrush current protection circuit in the
regenerative unit failed.
Cycle the power supply and see if the fault occurs again.
• If the fault occurs repeatedly, replace the board or the regenerative unit. For information on
board replacement, consult with your Yaskawa representative or the nearest Yaskawa sales
office.
Check the maintenance period for the inrush prevention relay in U4-06 (Soft Charge Bypass
Relay Maintenance).
• If the value of U4-06 has exceeded 90%, replace the board or the regenerative unit. For
information on board replacement, consult with your Yaskawa representative or the nearest
Yaskawa sales office.
A fault occurred in the power supply device.
Check the wiring of the power supply device.
Correct the wiring.
A fault occurred in the power supply.
A fault occurred in the power supply.
A fault occurred in power supply voltage
detection.
Check the wiring.
Correct the wiring.
Digital Operator
Display
Fault Name
Details
Uv2
Control Power Supply
Voltage Fault
Voltage is too low for the control regenerative unit input power.
Cause
Possible Solution
Internal circuitry is damaged.
• Cycle power to the regenerative unit. Check if the fault reoccurs.
• If the problem continues, replace either the control board or the entire regenerative unit. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
Digital Operator
Display
Fault Name
Details
Uv3
Undervoltage 3
(Soft-Charge Bypass
Circuit Fault)
The soft-charge bypass circuit failed.
Cause
Possible Solution
The relay or contactor on the soft-charge
bypass circuit is damaged.
• Cycle power to the regenerative unit and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire regenerative unit. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
• Check monitor U4-06 for the performance life of the soft-charge bypass.
• Replace either the control board or the entire regenerative unit if U4-06 exceeds 90%. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
<1> If the fault occurs when starting the regenerative unit, CPF00 or CPF20 is displayed. If it occurs during operation, CPF01 or CPF21 is
displayed.
TOEP_C710656_10B_1_0.book 92 ページ ２０１５年１月８日 木曜日 午後８時５５分
