Output frequency
is unstable.
・Check for the motor basic parameters.
・Several parameters are not
adequately set.
・Review the power capacity of both the inverter and motor.
・Big variation in the load.
・To keep to a minimum the supply fluctuations, by using an
optional AC reactor(ALI-****), DC link choke(DCL-***)
or/and input filter, improvement is possible.
・Supply voltage fluctuates.
Low torque or
torque stall.
・Can switch in [AA121] to torque boost, sensorless vector
control, … etc.
・V/f control is selected.
・If the torque in the regenerative operation is not enough,
Use a braking resistor or regenerative braking unit.
・It is being used for lift down
application.
・Review the capacity of both the inverter and motor.
Noise interferes
with the TVs and
radios nearby the
inverter.
・If possible, separate the wiring from the TV and radio.
・Put a zero-phase reactor either in the main supply input or
in the output of the inverter.
・Irradiated noise from the
inverter.
In operation the
circuit breaker gets
activated.
・Lower the carrier frequency [bb101] .
・Increase the sensitivity current of the earth leakage breaker
or replace it with a high sensitivity current.
・Enabling the built-in EMC filter will increase the leakage
current. If necessary, select an appropriate earth leakage
circuit breaker or consider turning off the EMC filter. *1)
Motor speed does
not increase.
・Frequency reference value is
low.
・The overload restriction [bA122] lowers the output
frequency as the output current increases.
It is necessary to suppress overcurrent by such as
increasing the acceleration time [AC120].
・Overload restriction function is
in operation.
・Increase the frequency reference or cancel any other high
priority frequency reference such as jogging or multi-speed.
・If the Upper frequency limit [bA102] setting is low, increase
the setting. Frequency limiting uses the Upper frequency
limit instead of the maximum frequency setting.
・Frequency reference is being
limited.
・Acceleration time is long.
・If the acceleration time [AC120] setting is long,
it accelerates slowly. Reduce the acceleration time gradually.
*1) SH1-03410-H(SH1-1600H)~SH1-06600-H(SH1-3150H) do not have EMC filter.
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