Fault Detection - YASKAWA CIMR-DC4A0040AAA Technical Manual

5.3

Fault Detection

◆ Fault Displays, Causes, and Possible Solutions
Table 5.6 Detailed Fault Displays, Causes, and Possible Solutions
Digital Operator
Fault Name
Display
Power Supply
Aov
Overvoltage
Cause
The input power supply voltage is too high.
Digital Operator
Fault Name
Display
Power Supply
AUv
Undervoltage
Cause
The capacity of the power supply is too small.
The AC fuse is open.
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.
Digital Operator
Fault Name
Display
Option Communication
bUS
Cause
No signal was received from the PLC.
Faulty communications wiring or an existing
short circuit.
Communication data error occurred due to
noise.
The option card is damaged.
The option card is not properly connected to
the converter.
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
The input power supply voltage became equal to or higher than the Input Power Supply
Overvoltage Detection Level.
200 V Class: Approximately 277 Vac
400 V Class: Approximately 554 Vac
Reduce the voltage to within the range in the power supply specifications.
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
Increase the capacity of the power supply.
A transistor inside the converter 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.
Check the input power supply for phase loss or an imbalance in the interphase voltages.
Investigate and correct the cause and reset the fault.
• The connection was lost after establishing initial communication.
Error • Only detected when the run command frequency reference is assigned to an option card.
Check for faulty wiring.
• Correct the wiring.
• Check for disconnected cables and short circuits and repair as needed.
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 converter input power side.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the
converter power supply input.
Replace the option card if there are no problems with the wiring and the error continues to occur.
The connector pins on the option card do not line up properly with the connector pins on the
converter.
Reinstall the option card.
Details
Possible Solution
Details
Possible Solution
Details
Possible Solution
5.3 Fault Detection
5
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