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Digital Operator Display
Fault Name
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF24
Drive Capacity Signal Fault
Entered a capacity that does not exist. (Checked when the drive is powered up.)
Cause
Possible Solution
Hardware is damaged.
Replace the drive.
Digital Operator Display
Fault Name
CPF25
Terminal Board Not Connected
Cause
Possible Solution
Terminal board is not connected correctly.
Reconnect the terminal board to the connector on the drive, then cycle the power to the drive.
Digital Operator Display
Fault Name
dEv
Speed Deviation (for Simple V/f with PG)
According to the pulse input (RP), the speed deviation is greater than the setting in F1-10 for longer than
the time set to F1-11.
Cause
Possible Solution
Load is too heavy.
Reduce the load.
Acceleration and deceleration times are set too
short.
Increase the acceleration and deceleration times (C1-01 through C1-08).
The load is locked up.
Check the machine.
Parameters are not set appropriately.
Check the settings of parameters F1-10 and F1-11.
Motor brake engaged.
Ensure the motor brake releases properly.
Digital Operator Display
Fault Name
dWFL
DriveWorksEZ Fault
dWAL
DriveWorksEZ Program Error Output
Cause
Possible Solution
Fault output by DriveWorksEZ
Correct the cause of the fault.
Digital Operator Display
Fault Name
E5
MECHATROLINK Watchdog Timer Error
The watchdog timed out.
Cause
Possible Solution
Data has not been received from the PLC,
triggering the watchdog timer.
Execute DISCONNECT or ALM_CLR, then issue a CONNECT command or SYNC_SET command and
proceed to phase 3.
Digital Operator Display
Fault Name
EF0
Option Card External Fault
An external fault condition is present.
Cause
Possible Solution
An external fault was received from the PLC
with other than F6-03 = 3 “alarm only” (the
drive continued to run after external fault).
• Remove the cause of the external fault.
• Remove the external fault input from the PLC.
Problem with the PLC program.
Check the PLC program and correct problems.
Digital Operator Display
Fault Name
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.
6.4 Fault Detection
270
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual