Hitachi SJ Series, User Manual

Page: 639 / 786

18-46
Chapter 18
Tips/FAQ/Troubleshooting
S13: Noises of
motor and
machines are
noisy.
• Raise the carrier frequency setting [bb101].
However, this
may increase noise generated in the inverter and leakage
currents from the inverter. In addition, derating is required
to the output current depending on the models.
• Carrier frequency is set low.
•
Change the set frequency. If a resonance occurs during
acceleration/deceleration, avoid the resonance frequency
in settings of the frequency jump functions [AG101] to
[AG106].
•
The revolution frequency of
motor and the natural frequency
of machines resonate.
Occurrence

Estimated cause(s)

Exemplar measures to be taken
S9: The
parameter you
are looking for is
not shown.
• Display limit function may be working.
Cancel the display
limit selection [UA-10].
• The display limit has been set.
• Operation on the operator keypad isn’t accepted if the input
terminal function 102 [DISP] is ON. Turn OFF the terminal.
• The display is fixed.
S11: Setting
cannot be made.
• Some parameters cannot be changed while the inverter is
running. If that is the case, turn OFF the inverter once.
• Inverter is running.
S12: Motor
rotates in a
reverse direction.
• Swapping two phases of wires connected to the motor
changes the direction of rotation.
• The wires connected to the
motor are in wrong phase
sequence.
• [AA-12] RUN key direction needs to be switched.
• When the RUN key on the
operator keypad is used, the
rotation direction setting is
wrong.
• Check the logic of 3-wire normal rotation / reverse rotation
terminal (018[F/R]).
• When the 3-wire function is
used, the input of input terminal
function F/R is reversed.
S10: Keypad
operator cannot
be operated.
• Operation on the operator keypad isn’t accepted if the input
terminal function 102 [DISP] is ON. Turn OFF the terminal.
• The display is fixed.