Yaskawa U1000 Industrial MATRIX Drive - Manual (Page 67)

Digital Operator Display Fault Name
dv4
Inversion Prevention Detection (CLV/PM control mode only)
Pulses indicate that the motor is rotating in the opposite direction of the speed reference. Set the number
of pulses to trigger inverse detection to F1-19.
Note: Set F1-19 to 0 to disable inverse detection in applications where the motor may rotate in
the opposite direction of the speed reference.
dv7 Initial Polarity Estimation Timeout
dWAL
DriveWorksEZ Fault
dWFL
dWF1
EEPROM Memory DriveWorksEZ Data Error
There is an error in the DriveWorksEZ program saved to EEPROM.
E5
MECHATROLINK Watchdog Timer Error
The watchdog timed out.
EF0
Option Card External Fault
An external fault condition is present.
EF1
External Fault (input terminal S1)
External fault at multi-function input terminal S1.
EF2
External Fault (input terminal S2)
External fault at multi-function input terminal S2.
EF3
External Fault (input terminal S3)
External fault at multi-function input terminal S3.
EF4
External Fault (input terminal S4)
External fault at multi-function input terminal S4.
EF5
External Fault (input terminal S5)
External fault at multi-function input terminal S5.
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.
Err
EEPROM Write Error
Data cannot be written to the EEPROM
FAn
Fan fault
Fan failure
FbH
Excessive PID Feedback
PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12
to 2 or 5 to enable fault detection.
FbL
PID Feedback Loss
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2 or 5) and the PID feedback level
is below the detection level set to b5-13 for longer than the time set to b5-14.
Fdv
Power Supply Frequency Fault
The input power supply frequency exceeded the allowable frequency fluctuation.
GF
Ground Fault
• A current short to ground exceeded 50% of rated current on the output side of the drive.
• Setting L8-09 to 1 enables ground fault detection.
LF
Output Phase Loss
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
i.6 Troubleshooting
YASKAWA ELECTRIC TOEP C710636 04C U1000 Industrial MATRIX Drive Quick Start Guide 67