Wiring
Test operation and adjustment
Operation
Emergency stop
Maintenance, inspection and parts replacement
Disposing of the inverter
Do not install assemblies or components (e. g. power factor correction capacitors) on the inverter output side, which are not approved
from Mitsubishi.
The direction of rotation of the motor corresponds to the direction of rotation commands (STF/STR) only if the phase sequence (U, V,
W) is maintained.
Before starting operation, confirm and adjust the parameters. A failure to do so may cause some machines to make unexpected
motions.
When you have chosen the retry function, stay away from the equipment as it will restart suddenly after an alarm stop.
The
key is valid only when the appropriate function setting has been made. Prepare an emergency stop switch separately.
Make sure that the start signal is off before resetting the inverter alarm. A failure to do so may restart the motor suddenly.
The inverter can be started and stopped via the serial port communications link or the field bus. However, please note that depending
on the settings of the communications parameters it may not be possible to stop the system via these connections if there is an error
in the communications system or the data line. In configurations like this it is thus essential to install additional safety hardware that
makes it possible to stop the system in an emergency (e.g. controller inhibit via control signal, external motor contactor etc). Clear and
unambiguous warnings about this must be posted on site for the operating and service staff.
The load used should be a three-phase induction motor only. Connection of any other electrical equipment to the inverter output may
damage the inverter as well as the equipment.
Do not modify the equipment.
Do not perform parts removal which is not instructed in this manual. Doing so may lead to fault or damage of the inverter.
The electronic thermal relay function does not guarantee protection of the motor from overheating.
Do not use a magnetic contactor on the inverter input for frequent starting/stopping of the inverter.
Use a noise filter to reduce the effect of electromagnetic interference and follow the accepted EMC procedures for proper installation
of frequency inverters. Otherwise nearby electronic equipment may be affected.
Take appropriate measures regarding harmonics. Otherwise this can endanger compensation systems or overload generators.
Use a motor designed for inverter operation. (The stress for motor windings is bigger than in line power supply).
When parameter clear or all clear is performed, set again the required parameters before starting operations. Each parameter returns
to the initial value.
The inverter can be easily set for high-speed operation. Before changing its setting, fully examine the performances of the motor and
machine.
The DC braking function of the frequency inverter is not designed to continuously hold a load. Use an electro-mechanical holding
brake on the motor for this purpose.
Before running an inverter which had been stored for a long period, always perform inspection and test operation.
For prevention of damage due to static electricity, touch nearby metal before touching this product to eliminate static electricity from
your body.
Provide a safety backup such as an emergency brake which will prevent the machine and equipment from hazardous conditions if the
inverter fails.
When the breaker on the inverter primary side trips, check for the wiring fault (short circuit), damage to internal parts of the inverter,
etc. Identify the cause of the trip, then remove the cause and power on the breaker.
When the protective function is activated (i. e. the frequency inverter switches off with an error message), take the corresponding
corrective action as described in the inverter manual, then reset the inverter, and resume operation.
Do not carry out a megger (insulation resistance) test on the control circuit of the inverter.
Treat as industrial waste.
General instructions
Many of the diagrams and drawings in instruction manuals show the inverter without a cover, or partially open. Never run the inverter in
this status. Always replace the cover and follow instruction manuals when operating the inverter.
CAUTION
CAUTION
WARNING
CAUTION
CAUTION
CAUTION
CAUTION
