Mitsubishi Electric FR-D720S-008SC Original Instruction page 6

The electronic thermal relay function does not guarantee protection of the motor from overheating. It is recommended to install
both an external thermal and PTC thermistor for overheat protection.
Do not use a magnetic contactor on the inverter input for frequent starting/stopping of the inverter. Otherwise, the life of the
inverter decreases.
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.
When a 400 V class motor is inverter-driven, please use an insulation-enhanced motor or measures taken to suppress surge
voltages. Surge voltages attributable to the wiring constants may occur at the motor terminals, deteriorating the insulation of
the motor.
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.
If you are installing the inverter to drive a three-phase device while you are contracted for lighting and power service, consult
your electric power supplier.
4.5 Emergency Stop
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.
4.6 Maintenance, Inspection and Parts Replacement
Do not carry out a megger (insulation resistance) test on the control circuit of the inverter. It will cause a failure.
It is recommended to make the following checks periodically:
Check for loose screws in the terminal block. Retighten any loose screws.
Check for dust accumulation on the inverter. Clean the heat sink and the cooling fan of the inverter.
Check for unusual noise generated by the inverter. Retighten installation screw.
Check for the operation condition. Keep the operation condition of inverter as written in the manual.
4.7 Disposal of the Inverter
Disposal of unusable or irreparable devices should always occur in accordance with the applicable country-specific waste-
disposal regulations (e.g. European Waste Code 16 02 14).
5 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.
NOTES
The FR-D700 SC complies to the EMC Directive 2004/108/EC and the relevant requirements of EN61800-3:2004 (Second environment/
PDS category "C3").
Therefore the FR-D700 SC is only suitable for use in an industrial environment and not for private use. If you want to use
FR-D700 SC inverter in first environment you will have to add an external RFI filter.
The FR-D700 SC complies to the Low Voltage Directive 2006 and the relevant requirements of EN61800-5-1:2007.
CAUTION
CAUTION
CAUTION
CAUTION