5.3 Fault Detection
86
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
EF6
External Fault
(input terminal S6)
External fault at multi-function input terminal S6.
EF7
External Fault
(input terminal S7)
External fault at multi-function input terminal S7.
EF8
External Fault
(input terminal S8)
External fault at multi-function input terminal S8.
Cause
Possible Solution
An external device tripped an alarm function.
Remove the cause of the external fault and reset the fault.
Wiring is incorrect.
• Properly connect the signal lines to the terminals assigned for external fault detection
(H1-
= 20 to 2B).
• Reconnect the signal line.
Multi-function contact input setting is incorrect.
• Check for unused terminals set for H1-
= 20 to 2B (External Fault).
• Change the terminal settings.
Digital Operator
Display
Fault Name
Details
Err
EEPROM Write Error Data cannot be written to the EEPROM
Cause
Possible Solution
Electrical noise has corrupted data while
writing to the EEPROM.
• Press “ENTER” on the digital operator.
• Correct the parameter setting.
• Cycle power to the regenerative unit.
Hardware problem
If the problem continues, replace the control board or the entire regenerative unit. Contact
Yaskawa or a Yaskawa representative for instructions on replacing the control board.
Digital Operator
Display
Fault Name
Details
Fan
Internal Circulation
Fan Fault
Fan or magnetic contactor failure
Cause
Possible Solution
Internal circulation fan malfunctioned.
• Cycle power to the regenerative unit.
• Check for fan operation.
• Verify the cumulative operation time of the fan with monitor U4-03, and verify the cumulative
operation time of the fan maintenance timer with U4-04.
• If the cooling fan has exceeded its expected performance life or is damaged in any other way,
follow the replacement instructions in
Fault detected in the internal circulation fan or
magnetic contactor to the power supply.
Digital Operator
Display
Fault Name
Details
Fdv
Power Supply
Frequency Fault
The input power supply frequency exceeded the allowable frequency fluctuation.
Cause
Possible Solution
A momentary power loss occurred.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 103
An input power supply wiring terminal is loose.
The fluctuation in the voltage of the input
power supply is too large.
The AC power supply fuse is open.
• A transistor inside the regenerative unit was destroyed.
• The input wiring or drive output has ground faulted or short circuited.
Contact your Yaskawa representative or the nearest Yaskawa sales office.
Digital Operator
Display
Fault Name
Details
FUA
AC Fuse Blowout
The power supply fuse is open.
Cause
Possible Solution
The power supply fuse is open.
• A transistor inside the regenerative unit was destroyed.
• The input wiring or drive output has ground faulted or short circuited.
Contact your Yaskawa representative or the nearest Yaskawa sales office.
Digital Operator
Display
Fault Name
Details
FUd
DC Fuse Blowout
The DC regenerative unit output fuse is open.
Cause
Possible Solution
The main transistor failed.
Replace the regenerative unit.
The DC circuit fuse is open.
The drive failed.
Replace the drive.
For information on drive replacement, consult with your Yaskawa representative or the nearest
Yaskawa sales office.
TOEP_C710656_10B_1_0.book 86 ページ ２０１５年１月８日 木曜日 午後８時５５分
