YASKAWA U1000 Quick Start Manual page 85

Digital Operator Display
YASKAWA ELECTRIC TOEP C710636 04D U1000 Industrial MATRIX Drive Quick Start Guide
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.
dv4
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
EEPROM Memory DriveWorksEZ Data Error
dWF1
There is an error in the DriveWorksEZ program saved to EEPROM.
MECHATROLINK Watchdog Timer Error
E5
The watchdog timed out.
Option Card External Fault
EF0
An external fault condition is present.
External Fault (input terminal S1)
EF1
External fault at multi-function input terminal S1.
External Fault (input terminal S2)
EF2
External fault at multi-function input terminal S2.
External Fault (input terminal S3)
EF3
External fault at multi-function input terminal S3.
External Fault (input terminal S4)
EF4
External fault at multi-function input terminal S4.
External Fault (input terminal S5)
EF5
External fault at multi-function input terminal S5.
External Fault (input terminal S6)
EF6
External fault at multi-function input terminal S6.
External Fault (input terminal S7)
EF7
External fault at multi-function input terminal S7.
External Fault (input terminal S8)
EF8
External fault at multi-function input terminal S8.
EEPROM Write Error
Err
Data cannot be written to the EEPROM
Fan fault
FAn
Fan failure
Excessive PID Feedback
FbH
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.
PID Feedback Loss
FbL
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.
Power Supply Frequency Fault
Fdv
The input power supply frequency exceeded the allowable frequency fluctuation.
Ground Fault
GF
• 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.
Output Phase Loss
LF
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
i.6 Troubleshooting
Fault Name
85