Chapter 10 LCD display and operating for SJ300/L300P series
10.5 Diagnosis
(
1
)
Inverter error message
Name Description
Display of remote
operator
ERR1
***
At constant
Speed
OC. Drive
On deceleration
speed
OC. Decel
On acceleration
speed
OC. Accel
Over-current protection
Motor is restricted and
decelerates rapidly, excessive
current is drawn through the
inverter and there is a risk of
damage. Current protection circuit
operates and the inverter output is
switched off.
Other
Over. C
Overload protection
(NOTE1)
When the Inverter detects an overload in the motor,
the internal electronic thermal overload operates
and the inverter output is switched off.
Over. L
Braking resistor
overload protection
When BRD exceeds the usage ratio of the
regenerative braking resistor, the over-voltage
circuit operates and the inverter output is switched
off.
OL. BRD
Over-voltage
protection
When regenerative energy from the motor exceeds
the maximum level, the over-voltage circuit operates
and the inverter output is switched off.
Over. V
EEPROM error
(NOTE2)
When EEPROM in the inverter is subject to radiated
noise or unusual temperature rises, the inverter
output is switched off.
EEPROM
Under-voltage
When the incoming voltage of inverter is low, the
control circuit can’t operate correctly. The
under-voltage circuit operates and the inverter
output is switched off.
Under. V
CT error
When an abnormality occurs to a CT (current
detector) in the inverter, the inverter output is
switched off.
CT
CPU error
When a mistaken action causes an error to the in
built CPU, the inverter output is switched off.
CPU
External trip
When a signal is given to the EXT intelligent input
terminal, the inverter output is switched off.
(on external trip function select)
EXTERNAL
USP error
This is the error displayed when the inverter power
is restored while still in the RUN mode.
(Valid when the USP function is selected)
USP
Ground fault protection
When power is turned ON, this detects ground faults
between the inverter output and the motor.
GND. Flt
Incoming over-voltage
protection
When the incoming voltage is higher than the
specification value, this detects it for 60 seconds
then the over-voltage circuit operates and the
inverter output is switched off.
OV. SRC
NOTE1: After a trip occurs and 10 seconds pass, restart with reset operation.
NOTE2: When EEPROM error occurs, confirm the setting data again.