Yaskawa E7L Drive Bypass - Manual (Page 181)

Diagnostic & Troubleshooting 6 - 9
CPF23
Option DPRAM Err
Communication Option Card
Interconnection Fault
An option board is not
correctly connected to the con-
trol board or an option board
that is not made for the Drive
is attached to the control
board.
Remove power to the Drive.
Connect the option board once
more.
Perform a factory initialization.
Cycle power off and on to the
Drive.
Replace the option board.
Replace the control board.
EF0
Opt External Flt
Communication Option Card External Fault
An external fault condition
exists.
Check for an external condition.
Verify the parameters.
Verify communication signal.
EF3
Ext Fault S3
External Fault at Terminal S3
An external fault condition
exists connected to a multi-
function digital input.
Eliminate the cause of an
external fault condition.
EF4
Ext Fault S4 External Fault at Terminal S4
EF5
Ext Fault S5
External Fault at Terminal S5
EF6
Ext Fault S6
External Fault at Terminal S6
EF7
Ext Fault S7
External Fault at Terminal S7
Remove the fault from a multi-
function digital input.
FBL
Feedback Loss
PI Feedback Loss
This fault occurs when PI Feedback Loss
Detection is programmed to fault.
(b5-12 = 2) and the
PI Feedback < PI Feedback Loss Detection
Level (b5-13) for the PI Feedback Loss
Detection Time (b5-14).
PI Feedback source
(e.g. transducer, sensor,
building automation signal) is
not installed correctly or is not
working.
Verify Drive is programmed to
receive the PI Feedback source
signal.
Check to ensure the PI Feedback
source is installed and working
properly.
GF
Ground Fault
Output Ground Fault
Drive output grounding current has
exceeded 50% of the Drive rated output
current.
Motor lead is shorted to
ground, DCCT defective.
Remove the motor and run the
Drive without the motor.
Check the motor for a phase to
ground short.
Check the output current with a
clamp on meter to verify the
DCCT reading.
LF
Output Pha Loss
Output Phase Loss
Drive output has an open phase or the motor
no load current is below the setting of
parameter E2-03.
Open phase on the output on
the Drive.
Check output voltage.
Loose terminal screws at T1,
T2 or T3.
Tighten the terminal screws.
Parameter E2-03 set
incorrectly.
Adjust E2-03 to a lower value.
Table 6.3 Fault Displays and Processing (Continued)
Digital
Operator Display
Description Cause Corrective Action