1. Basic Checklist
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1
Basic Checklist
1.1 Before You Think It Failed
Installed
Environment /
Input/Output
voltage
Is the installed location appropriate?
Does the environment meet the inverters operating conditions?
Does the power source match the inverter’s rated input?
Is the rated output of the inverter sufficient to supply the equipment?
Is the circuit breaker installed on the input side of the inverter?
Is the circuit breaker correctly rated?
Are the power source cables correctly connected to the R/S/T terminals
of the inverter?
(Caution: Connecting the power source to the U/V/W terminals may
damage the inverter)
Are the motor output cables connected in the correct phase rotation
(U/V/W)?
(Caution: Motors will rotate in reverse direction if three phase cables are
not wired in the correct rotation)
Are the cables used to connect power terminals correctly rated?
Is the inverter grounded properly?
Are the power terminal screws and the ground terminal screws tightened
to their specific torques?
Are the overload protection circuits installed correctly on the motors (if
multiple motors are running using one inverter)?
Is the inverter separated from the power source by a magnetic contactor
(if a braking resistor is in use)?
Are advanced-phase capacitors, surge protection and electromagnetic
interference filters installed correctly?
(These devices MUST NOT be installed on the output side of the
inverter)
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