11 Protection Function
58
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No. of
flashing
Alarm
type
Desctiptions
Causes
Troubleshooting
1 (
E1
)
Overcurrent
error
When over current
flows at motor RUN
element
1. Over load
2. Insufficient SMPS capacity
1. Change operation condition or
reduce load so that sudden
load fluctuation does not
occur.
2. Check that less than the
recommended SMPS capacity
is used.
3. Check driver break.
2 (
E2
)
Overspeed
error
When motor speed is
over 3,500rpm
1. When overload is applied
and released at a moment.
2. Turning more than 4,000
rpm by external force.
1. Change operation condition or
reduce load so that sudden
load fluctuation does not
occur.
2. Change the operating
condition so that the motor
does not ratate more than
4,000 rpm.
3 (
E3
)
Position
tracking
error
When the gap
between position
command value and
current position value
is over 90°
1. Over load
2. Motor connector and cable
connection error
3. Burnout of line driver IC in
encoder
1. Change operation condition or
reduce load so that sudden
load fluctuation does not
occur.
2. Check motor connector and
cable connection.
3. Replace the line driver IC in
encoder.
4 (
E4
)
Overload
error
When applying load
over the rated load for
over 1 sec.
1. Over load
2. Insufficient SMPS capacity
1. Change operation condition or
reduce load so that sudden
load fluctuation does not
occur.
2. Check that less than the
recommended SMPS capacity
is used.
3. Check driver break.
5 (
E5
)
Overheat
error
When driver inner
temperature is over
85
℃
1. Installed in an enclosed
space
1. Change the installation
environment.
-Air flow around driver
installation.
-Heat dissipation (heat sink or
fan)
6 (
E6
)
Motor
connection
error
When motor cable
connection error
occurs at driver
1. Motor connector and cable
connection error
2. Burnout of the inverter in the
driver
1. Check motor connector and
cable connection.
2. Replace burned parts of the
inverter in the driver.
