vi
(4) Operation precautions
- When the Auto restart function is selected the drive will restart after a fault has occurred.
- The Stop key on the keypad is always active regardless of drive control (start/stop) methods set in
parameters DRV-03 and DRV-91.
- If Restart after Fault Reset (AFN-21) is set to “yes”, and a fault reset is made with the run command and/or
reference signal present, a sudden start will occur. Verify correct setting of this parameter and check that
the run command and/or reference signal is turned off in advance of resetting any faults.
- Do not modify the drive.
- Depending on the motor specifications and user ETH overload settings, the motor may not be protected by
electronic thermal function of drive.
- The operation of the drive is intended to be controlled by either keypad command or control input signals.
Do not use a magnetic contactor or any other device that routinely disconnects the drive and reconnects the
drive to the input supply power for the purpose of starting and stopping the motor.
- A noise filter may be installed to reduce the effect of electromagnetic interference. Consult factory for
more information.
- In cases with input voltage unbalances, install an AC input reactor.
- Power Factor capacitors and generators may become overheated and damaged due to harmonics created by
the drive.
- Use an inverter duty rated motor or take measures to suppress the surge voltage at the motor with a dV/dT
filter or equivalent. A surge voltage attributable to wiring constant is generated at the motor terminals and
may deteriorate mtoor insulation.
- The drive can be set to operate a motor at high-speeds. Verify the speed capability of motor and machinery
prior to operating drive.
- Holding torque is not produced when using the DC-Brake function. Install separate equipment when
holding torque is required.
(5) Fault prevention precautions
- If required, provide a safety backup such as an emergency mechanical brake to prevent any hazardous
conditions if the drive fails during operation.
(6) Maintenance, inspection and parts replacement
- Do not Meggar (hi-pot or insulation resistance) test the power or control circuits of the drive.
- Refer to Chapter 7 for periodic inspection and parts replacement details.
(7) General instructions
Many of the diagrams and drawings in this instruction manual may show the drive covers removed. Prior to
operating the unit, be sure to restore covers and circuit protection according to specifications.
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