Hitachi L100 IP Series, Instruction Manual

Page: 64 / 94

Chapter 10 – Trouble shooting
10-2
Error Condition Possible cause Remedy
Are the motor load fluctuations too great?
Choose an inverter and motor of a higher
rating.
Reduce load fluctuations to a minimum.
The motor run
is unstable
Are there motor resonating frequencies?
Avoid critical frequencies by using jump
frequencies ( A 63 – A 68 ) or change the
carrier frequency ( b 83 ).
Has the correct maximum frequency
been set?
Check the configured operating frequency
range and the V/F characteristics.
The motor’s rpm
does not match
frequency.
Have the nominal rpm of the motor and
the gear reduction ratio been set correctly?
Check the nominal rpm of the motor and
the gear reduction ratio.
The inverter power supply had been shut
off before the entered parameter settings
were saved by pressing the STR key.
Enter the parameter settings once more
and save each input made.
The entered
parameters have
not been saved.
After switching off the power supply the
entered values are copied into the internal
EEPROM. The power off duration should
at least be 6 seconds or more.
Enter the parameter settings once more
and then turn off the power supply for
more than 6 seconds.
The saved
parameters are
not the same as
the parameters
that had been
entered.
The copy unit
parameter settings
have not been
copied to the
inverter.
After copying the parameters from the
copy unit DRW into the inverter the
power supply was left in the on state for
only less than 6 seconds.
Copy the parameter settings once more
and then keep the power supply turned on
for more than 6 seconds.
The motor won’t
start or stop and
also no set value
can be entered.
Have the functions A 01 and A 02 been
configured correctly?
Check if the settings made under
A 01
and A 02 are correct .
Has the software lock function been
activated?
Deactivate the software lock using b 31
so that all parameters can be changed
again.
Has the hardware lock been activated?
Deactivate the digital input configured
as SFT.
No data entries
can be made.
Parameters can
neither be set nor
changed.
Has position 4 of the dip switch (on the
back of the copy unit) been set to ON?
Set position 4 of the dip switch to OFF so
that the remote operator can be read out.
The electronic
thermal pro-
tection is activa-
ted (trip E 05 ).
Has a too high manual boost been
configured?
Have the correct settings been made in
conjunction with the electronic thermal
protection function?
Check the settings for boost and electronic
thermal protection.
Important note for saving changed parameters:
After changed parameters have been saved with the STR key (when parameters are changed using the L100
digital operator) or with the COPY key (when parameters are copied into the inverter using the DRW copy
unit) no entry must be made using the inverter’s digital operator for at least 6 seconds. However, when a key
is pressed within this time, or a reset command is issued, or the inverter is switched off, the data may not be
saved correctly.