Chapter 7 Troubleshooting
187
No. Fault ID
Failure type
Possible causes
Solutions
decelerating.
3.the deceleration time is too
short
4.didn't install braking unit
and braking resistor
or install braking resistor.
3.increase the deceleration
time
4.install braking unit and
brake resistor
7
Err.07
Constant
speed
overvoltage
1.there is external force to
drag the motor to run when
running
2.the input voltage is high
1.cancel the external force
or install braking resistor.
2.set the voltage to the
normal range
8
Err.08
Control power
failure
The range of input voltage is
not within the specification
Adjust the voltage to the
range of the requirements
of specification
9
Err.09
Under voltage
fault
1.the momentary power cut
2.the inverter's input voltage
is not within the specification
3.the bus voltage is not
normal
4.the rectifier bridge and
buffer resistance are abnormal
5.the drive panel is abnormal.
6.the control panel is
abnormal
1.reset fault
2.adjust the voltage to the
normal range
3.seek for technical
support
10 Err.10
Inverter
overload
1.the type selection of inverter
is small
2.whether the load is too large
or the motor stall occurs
1.choose the inverter with
large power level
2.reduce the load and
check the motor and its
mechanical conditions
11 Err.11
Motor
Overload
1. power grid voltage is too
low
2.whether the setting motor
protection parameters (F8.03)
is appropriate or not
3.whether the load is too large
or the motor stall occurs
1.check the power grid
voltage
2.correctly set this
parameter.
3.reduce the load and
check the motor and its
mechanical conditions
12 Err.12
Input phase
loss
1.the drive panel is abnormal.
2.the lightning protection
plate is abnormal
3.the main control panel is
abnormal
1.replace the drive, the
power board or contactor
2.seek for technical
support
3.check and eliminate the