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9-7
Symptom Probable cause Countermeasure
The rpm
of the
motor
will not
increase.
After checking the wiring of
the frequency setter, the rpm still
does not increase when the setter
is turned.
Replace the frequency setter.
Are terminals 7 and CM1, terminal 6
and CM1 ON (Sink type)?
Turn off terminal 7 and 6. (When the
frequency and multistage speed are fixed at
a given frequency, the speed potentiometer
will be invalid.)
Is the load too great? Decrease the load.
When the load is too great, the limiting
function will be activated, so that
the rotational speed will be lower than
the setting.
The rpm
of the
motor
does not
match the
inverter.
Is the maximum frequency setting
correct?
Are the number of motor poles,
the gear ratio, and pulley ratio correct?
The data
is
incorrect.
The data is
returned to
the initial
setting.
Turn the STN terminal OFF.
Input the data again.
Replace the logic PCB.
The data has
not changed.
Was the power turned off without
pushing the key after the data
was changed with keys.
Input the data and push the key once.
The data is memorized upon power off.
Is the time from power OFF to ON less
than six seconds?
Take six seconds or more when turning power
OFF and ON after changing the data.
Data copied
by the copy
unit
is not input.
Is the power turned off for five seconds
or more after the display changed
from REMT to INV.
(HRW-OJ)
Copy again and turn the power off five
seconds or more after copying.
1
2
FUNC
FUNC
Check the speed-change ratio.
The STN terminal is turned ON and the
power is turned on.
The input terminals 1 to 5 are turned
ON and then power is turned on.
The data
is not
changed.
Frequency
setting can
not be
changed.
Run and
stop can not
be done.
The change of the terminal mode and
digital operator mode were correct?
Confirm the change in setting mode.
The data can
not be
changed.
Is the input terminal SFT ON ?
Is the software lock mode set at MD2
or MD3 ?
Turn the SFT terminal OFF.
Turn the switch OFF.
Note: If software lock is ON because of
use with an explosion proof motor,
do not release the software locks.