Yaskawa CIMR-LU Drives - Manual (Page 131)

5 Troubleshooting
YASKAWA ELECTRIC TOEP C710616 38F YASKAWA AC Drive L1000A Quick Start Guide 131
Tr
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5
dEv
Speed Deviation (for Control Mode with Encoder)
The deviation between the speed reference and speed feedback is greater than the setting in F1-10 for
longer than the time set to F1-11.
dv1
Encoder Z Pulse Fault
The motor turned one full rotation without the Z Pulse being detected.
dv2
Z Pulse Noise Fault Detection
The Z pulse is out of phase by more than 5 degrees for the number of times specified in parameter
F1-17.
dv3
Inversion Detection
The torque reference and acceleration are in opposite directions and the speed reference and actual
motor speed differ by over 30% for the number of times set to F1-18.
dv4
Inversion Prevention Detection
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.
dv6
Overacceleration Detection
The acceleration of the elevator car exceeds the overacceleration detection level (S6-10)
dv7
Rotor Polarity Detection Timeover
Unable to detect the magnetic poles within the designated time.
dv8
PM Rotor Position Estimation Error
An invalid value resulted from Initial Pole Search.
Note: Reset the fault and try Initial Pole Search again.
EF0
Option Card External Fault
An external fault condition is present.
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.
FrL
Speed Reference Missing
Parameter d1-18 is set to 3, leveling speed detection is not assigned to a digital input (H1-
≠ 53)
and no speed was selected while an Up or Down command was entered.
GF
Ground Fault
A current short to ground exceeded 50% of rated current on the output side of the drive.
LF
Output Phase Loss
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
LF2
Output Current Imbalance (detected when L8-29 = 1)
One or more of the phases in the output current is lost.
oC
Overcurrent
Drive sensors have detected an output current greater than the specified overcurrent level.
Digital Operator Display Fault Name
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