18-48
Chapter 18
Tips/FAQ/Troubleshooting
S18: The earth
leakage circuit
breaker is
activated as the
inverter is
operated.
• Lower the carrier frequency [bb101].
• Raise the sensitivity current in the earth leakage circuit
breaker, or replace the breaker with the one with higher
sensitivity current.
• Leakage currents in the
inverter are large.
S19: DC braking
is disabled.
• Set DC braking force at the time of the stop [AF105] and DC
braking force at the start [AF108].
• The DC braking force is not set.
• Set DC braking time at the time of the stop [AF106] and DC
braking time at the start [AF109].
• The DC braking time is not set.
S20: TV and radio
have noises near
the inverter.
• Locate the inverter wires as far as possible from a TV and
radio.
• Install ZCL to the main power supply input and output of the
inverter.
• Radiation noise from the
inverter
S17:
Operation/setting
of Modbus
communication
cannot be made.
• If you changed [CF-01] to [CF-38], turn OFF the control
power supply and restart.
• Changes made to
communication parameters
haven’t been reflected.
• Check that operation command selection [AA111] is set to 03
(RS485).
• The operation command
selection is not set to RS485.
• Check that the main speed command selection [AA111] is set
to 03 (RS485).
• The frequency command
selection is not set to RS485.
• Set the correct value in [CF-01], then turn OFF the control
power supply and restart.
• The communication speed
setting is wrong.
• Set the correct value in [CF-02], then turn OFF the control
power supply and restart.
• Station numbers are wrongly set
or overlapping each other.
• Set the correct value in [CF-03], then turn OFF the control
power supply and restart.
• The communication parity
setting is wrong.
• Set the correct value in [CF-04], then turn OFF the control
power supply and restart.
• The communication stop bit
setting is wrong.
• Connect wires properly to the SP and SN terminals on the
control circuit terminal block.
• Wiring is wrong,
Occurrence
Estimated cause(s)
Exemplar measures to be taken
Содержание SJ Series
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