7.2
Fault analysis and solution
Error
code
Error
name
Causes
Solution
Err-2
Overvoltage
protection
①
The driver power input
voltage
exceeds
the
specified value.
②
The regenerative energy is
too large when the drive is
braked.
③
Drive failure (loop failure)
①
Use correct voltage
②
Increase the acceleration /
deceleration time, reduce
load or increase the value
of PA-28.
③
Replace a new drive
Err-5
Overcurrent
protection
①
Motor current line A+, A-,
B+, B- short circuit.
②
Drive failure (loop, fail parts).
③
Motor burned out.
①
Check if the motor current
line is short-circuited, and
if there is a burr on the line.
Connect the current lines
correctly.
②
Replace a new drive
③
Replace a new motor
Err-8
Motor phase
wiring
connection
wrong
protection
①
Motor current line A+, A-,
B+, B- line sequence error.
②
Motor current line A+, A-,
B+, B- short circuit.
①
Verify
that
the
motor
current line is properly
connected as required.
②
Check if the motor current
line is shorted.
Err-4
Encoder
error
①
Encoder feedback interface
is loose, off-line,
disconnected, shorted.
②
The motor components are
damaged.
③
Drive failure.
①
Check that the encoder
feedback cable is correct
and connected reliably.
②
Replace a new motor
③
Replace a new drive.
Err-7
Tracking
tolerance
error
protection
①
Motor current line A+, A-,
B+, B- is
not
reliably
connected,
or
the
line
sequence is wrong.
②
The load is too large, the
acceleration/deceleration
time is too short, or the
motor
selection
is
not
suitable.
③
The
motor
has
an
electromagnetic brake and
the electromagnetic brake is
not opened as required.
④
The
motor
has
an
electromagnetic brake, but
①
Verify
that
the
motor
current line is correctly and
reliably
connected
as
required.
②
Increase the value of PA-9
appropriately
without
affecting the processing
requirements
of
the
equipment.
③
Properly
extend
the
acceleration
and
deceleration
time
to
reduce
the
load
and
reduce the speed.
④
Check that the motor
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