BENSHAW Rsi S Series, Инструкция по эксплуатации

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Troubleshooting
342
Type Cause Remedy
underload applications. Over-excitation has occurred due to
an inaccurate V/F setting at low
speed. Reduce the torque boost value to
avoid over-excitation.
While the inverter is in
operation, a control unit
malfunctions or noise occurs. Noise occurs due to switching inside
the inverter. Change the carrier frequency to
the minimum value.
Install a micro surge filter in the
inverter output.
When the inverter is
operating, the earth leakage
breaker
is activated.
An earth leakage breaker will
interrupt the supply if current flows
to ground during inverter
operation. Connect the inverter to a ground
terminal.
Check that the ground resistance
is less than 100
Ω
for 200V
inverters and less than 10
Ω
for
400V inverters.
Check the capacity of the earth
leakage breaker and make the
appropriate connection, based on
the rated current of the inverter.
Lower the carrier frequency.
Make the cable length between
the inverter and the motor as
short as possible.
The motor vibrates severely
and does not rotate normally. Phase-to-phase voltage of 3-phase
power source is not balanced. Check the input voltage and
balance the voltage.
Check and test the motor’s
insulation.
The motor makes humming,
or loud noises. Resonance occurs between the
motor's natural frequency and the
carrier frequency. Slightly increase or decrease the
carrier frequency.
Resonance occurs between the
motor's natural frequency and the
inverter’s output frequency. Slightly increase or decrease the
carrier frequency.
Use the frequency jump function
to avoid the frequency band
where resonance occurs.
The motor vibrates/hunts. The frequency input command is an
external, analog command. In situations of noise inflow on the
analog input side that results in
command interference, change
the input filter time constant
(In.07).
The wiring length between the
inverter and the motor is too long. Ensure that the total cable length
between the inverter and the
motor is less than 200m (50m for
motors rated 3.7 kW or lower).
The motor does not come to It is difficult to decelerate Adjust the DC braking parameter.