3 fault detection, Fault displays, causes, and possible solutions, Fault detection – Yaskawa R1000 Series Power Regenerative Unit User Manual

Page 91

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5.3 Fault Detection

YASKAWA ELECTRIC TOEP C710656 08B YASKAWA Power Regenerative Unit - R1000 Instruction Manual

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5.3 Fault Detection

Fault Displays, Causes, and Possible Solutions

Table 5.6 Detailed Fault Displays, Causes, and Possible Solutions

Digital Operator

Display

Fault Name

Details

Aov

Power Supply

Overvoltage

The input power supply voltage became equal to or higher than the Input Power Supply
Overvoltage Detection Level (L8-36).
200 V Class: Approximately 277 Vac
400 V Class: Approximately 554 Vac

Cause

Possible Solution

The input power supply voltage is too high.

Reduce the voltage to within the range in the power supply specifications.

Digital Operator

Display

Fault Name

Details

AUv

Power Supply

Undervoltage

The input power supply voltage became equal to or lower than the Input Power Supply
Undervoltage Detection Level.
200 V Class: Approximately 150 Vac
400 V Class: Approximately 300 Vac

Cause

Possible Solution

The capacity of the power supply is too small.

Increase the capacity of the power supply.

The AC fuse is open.

A transistor inside the regenerative unit was destroyed.
The input wiring is ground-faulted or short-circuited.
Or, the drive output is ground-faulted or short-circuited, which destroyed the output transistor.
Consult with your Yaskawa representative or the nearest Yaskawa sales office.

The distortion in the power supply is too large. Lower the impedance of the input power supply wiring.
A phase loss occurred in the input power
supply.

Check the input power supply for phase loss or an imbalance in the interphase voltages.
Investigate and correct the cause and reset the fault.

Digital Operator

Display

Fault Name

Details

bUS

Option Communication

Error

• The connection was lost after establishing initial communication.
• Only detected when the run command frequency reference is assigned to an option card.

Cause

Possible Solution

No signal was received from the PLC.

Check for faulty wiring.

• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.

Faulty communications wiring or an existing
short circuit.

Communication data error occurred due to
noise.

Check the various options available to minimize the effects of noise.

• 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 absorbers

if necessary.

• Use only recommended cables or other shielded line. Ground the shield on the controller side

or the regenerative unit input power side.

• Separate all communication wiring from drive power lines. Install an EMC noise filter to the

regenerative unit 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 regenerative unit.

The connector pins on the option card do not line up properly with the connector pins on the
regenerative unit.
Reinstall the option card.

TOEP_C710656_08B_1_0.book 91 ページ 2015年2月5日 木曜日 午前10時7分

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