Check first when you have trouble
151
6
6.6.5
Inverter cannot be operated
6.6.6
Unable to write parameter setting
6.6.7
Breaker trips
6.6.8
Converter unit generates abnormal noise
Checkpoints
Cause
Countermeasure
Refer to
page
Control
Circuit
Terminals RDA and SE of the converter unit are
not connected to terminals MRS (X10 signal) and
SD of the inverter respectively.
Check for the wiring.
PARAMETER
Inverter parameter settings are incorrect.
Check for the inverter parameter settings.
Refer to the
Instruction
Manual
(Detailed)
of the
inverter.
Checkpoints
Cause
Countermeasure
Refer to
page
Parameter
setting
Parameter is disabled by the
Pr.77 Parameter
write selection
setting.
Check the
Pr.77
setting.
Key lock mode is enabled by the
Pr.161 Key lock
operation selection
setting.
Check the
Pr.161
setting.
Checkpoints
Cause
Countermeasure
Refer to
page
Main circuit
Wiring or installation is improper.
Check for the wiring and the installation.
Appropriate power supply voltage is not applied.
Check that the power supply voltage is applied.
—
Checkpoints
Cause
Countermeasure
Refer to
page
fan
Fan cover was not correctly installed when a
cooling fan was replaced.
Install a fan cover correctly.
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