User Manual of EM730/EM730E Series Inverter
304
E19
Error of current
detection circuit
The detection circuit of the drive
board or control board is damaged.
1.
Seek technical support.
E20
Stall protection
1.
The deceleration time is too
short.
2.
Error of dynamic brake for
deceleration.
3.
The load is too heavy.
1.
Increase the deceleration time.
2.
Check the dynamic brake.
3.
Check whether the motor cannot
be stopped as it is driven by
another load.
E21
PID feedback
disconnection
1.
The PID feedback is greater
than the upper limit (F09.24) or
less than the lower limit
(F09.25), depending on the
type of the feedback sensor.
1.
Check whether the feedback line
falls off.
2.
Check whether the sensor is
working abnormally.
3.
Adjust the detection value of
feedback disconnection to a
reasonable level.
E24
Self-identificatio
n error
1.
Press the STOP/RESET key
during parameter
identification.
2.
The external terminal stops
working (FRS = ON) properly
during parameter
identification.
3.
The motor is not connected.
4.
The rotary self-learning motor
is not disconnected from the
load.
5.
The motor fails.
1.
Press the STOP/RESET key to
reset.
2.
The external terminal should not
be operated during parameter
identification.
3.
Check the connection between the
inverter and motor.
4.
Disconnect the rotary self-learning
motor from the load.
5.
Check the motor.
E26
Load loss
protection
1.
The motor is not connected or
does not match the load.
2.
Load loss occurs.
3.
The parameters of load loss
protection are not set
reasonably.
1
、
Check the wiring and use the
appropriate motor
2
、
Check the equipment.
3
、
Change the off-load detection
level F07.22 and detection time
F07.23.
E27
Up to cumulative
power-on time
1. The inverter maintenance time
is up.
1. Please contact the dealer for
technical support.
E28
Up to cumulative
running time
1. The inverter maintenance time
is up.
1. Please contact the dealer for
technical support.
E44
Wiring protection
1. The valid time of the wiring
detection terminal is too long.
2. The invalid time of the wiring
detection terminal is too long.
1. Check whether the sensor can work
normally.
2. Check whether the terminal is
capable of properly judging the
closing and opening.
E57
Overpressure in
pipeline network
1. The feedback pressure in the
water supply application is too
1. Check whether the sensor is in the
abnormal status.