Inverter must be installed on a nonflammable wall without holes (so that
nobody touches the inverter heatsink on the rear side, etc.). Mounting it to
or near flammable material may cause a fire.
If the inverter has become faulty, the inverter power must be switched
OFF. A continuous flow of large current may cause a fire.
Do not connect a resistor directly to the DC terminals P/+ and N/-. Doing
so could cause a fire.
Be sure to perform daily and periodic inspections as specified in the
Instruction Manual. If a product is used without any inspection, a burst,
breakage, or a fire may occur.
The voltage applied to each terminal must be the ones specified in the
Instruction Manual. Otherwise burst, damage, etc. may occur.
The cables must be connected to the correct terminals. Otherwise burst,
damage, etc. may occur.
The polarity (+ and -) must be correct. Otherwise burst, damage, etc. may
While power is ON or for some time after power-OFF, do not touch the
inverter as it will be extremely hot. Touching these devices may cause a
The following instructions must be also followed. If the product
is handled incorrectly, it may cause unexpected fault, an injury,
or an electric shock.
Transportation and Mounting
Any person who is opening a package using a sharp object, such as a
knife and cutter, must wear gloves to prevent injuries caused by the edge
of the sharp object.
The product must be transported in correct method that corresponds to
the weight. Failure to do so may lead to injuries.
Do not stand or rest heavy objects on the product.
Do not stack the boxes containing inverters higher than the number
When carrying the inverter, do not hold it by the front cover; it may fall off
During installation, caution must be taken not to drop the inverter as doing
so may cause injuries.
The product must be installed on the surface that withstands the weight of
Do not install the product on a hot surface.
The mounting orientation of the inverter must be correct.
The inverter must be installed on a strong surface securely with screws so
that it will not drop.
Do not install or operate the inverter if it is damaged or has parts missing.
Foreign conductive objects must be prevented from entering the inverter.
That includes screws and metal fragments or other flammable substance
such as oil.
As the inverter is a precision instrument, do not drop or subject it to
The surrounding air temperature for LD rating must be between -10 and
+50°C (non-freezing). The surrounding air temperature for SLD rating
must be between -10 and +40°C (non-freezing). Otherwise the inverter
may be damaged.
The ambient humidity must be 95%RH or less (non-condensing).
Otherwise the inverter may be damaged. (Refer to
The storage temperature (applicable for a short time, e.g. during transit)
must be between -20 and +65°C. Otherwise the inverter may be
The inverter must be used indoors (without corrosive gas, flammable gas,
oil mist, dust and dirt etc.) Otherwise the inverter may be damaged.
The inverter must be used at an altitude within 2500 m or less above sea
level, within 5.9 m/s
vibration at 10 to 55 Hz (directions of X, Y, Z axes).
Otherwise the inverter may be damaged. (Refer to
If halogen-based materials (fluorine, chlorine, bromine, iodine, etc.)
infiltrate into a Mitsubishi product, the product will be damaged. Halogen-
based materials are often included in fumigant, which is used to sterilize
or disinfest wooden packages. When packaging, prevent residual
fumigant components from being infiltrated into Mitsubishi products, or
use an alternative sterilization or disinfection method (heat disinfection,
etc.) for packaging. Sterilization of disinfection of wooden package should
also be performed before packaging the product.
To prevent a failure, do not use the inverter with a part or material
containing halogen flame retardant including bromine.
Do not install a power factor correction capacitor or surge suppressor/
capacitor type filter on the inverter output side. These devices on the
inverter output side may be overheated or burn out.
The output side terminals (terminals U, V, and W) must be connected
correctly. Otherwise the motor will rotate inversely.
PM motor terminals (U, V, W) hold high-voltage while the PM motor is
running even after the power is turned OFF. Before wiring, the PM motor
must be confirmed to be stopped. Otherwise you may get an electric
Never connect a PM motor to the commercial power supply.
Applying the commercial power supply to input terminals (U,V, W) of a PM
motor will burn the PM motor. The PM motor must be connected with the
output terminals (U, V, W) of the inverter.
or less for the FR-F840-04320(185K) or higher.
Before starting operation, each parameter must be confirmed and
adjusted. A failure to do so may cause some machines to make
Everyone must stay away from the equipment when the retry function is
set as it will restart suddenly after a trip.
function setting status, separate circuit and switch that make an
emergency stop (power OFF, mechanical brake operation for emergency
stop, etc.) must be provided.
OFF status of the start signal must be confirmed before resetting the
inverter fault. Resetting inverter fault with the start signal ON restarts the
Do not use a PM motor for an application where the PM motor is driven by
its load and runs at a speed higher than the maximum motor speed.
Use this inverter only with three-phase induction motors or with a PM
motor. Connection of any other electrical equipment to the inverter output
may damage 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 product.
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.
The effect of electromagnetic interference must be reduced by using a
noise filter or by other means. Otherwise nearby electronic equipment
may be affected.
Appropriate measures must be taken to suppress harmonics. Otherwise
power supply harmonics from the inverter may heat/damage the power
factor correction capacitor and generator.
When driving a 400 V class motor by the inverter, the motor must be an
insulation-enhanced motor or measures must be taken to suppress surge
voltage. Surge voltage attributable to the wiring constants may occur at
the motor terminals, deteriorating the insulation of the motor.
When parameter clear or all parameter clear is performed, the required
parameters must be set again before starting operations. because all
parameters return to their initial values.
The inverter can be easily set for high-speed operation. Before changing
its setting, the performances of the motor and machine must be fully
Stop status cannot be held by the inverter's brake function. In addition to
the inverter's brake function, a holding device must be installed to ensure
Before running an inverter which had been stored for a long period,
inspection and test operation must be performed.
Static electricity in your body must be discharged before you touch the
Only one PM motor can be connected to an inverter.
A PM motor must be used under PM motor control. Do not use a
synchronous motor, induction motor, or synchronous induction motor.
Do not connect a PM motor under the induction motor control settings
(initial settings). Do not use an induction motor under the PM motor
control settings. Doing so will cause a failure.
In the system with a PM motor, the inverter power must be turned ON
before closing the contacts of the contactor at the output side.
When the emergency drive operation is performed, the operation is
continued or the retry is repeated even when a fault occurs, which may
damage or burn the inverter and motor. Before restarting the normal
operation after using the emergency drive function, make sure that the
inverter and motor have no fault.
A safety backup such as an emergency brake must be provided to
prevent hazardous conditions to the machine and equipment in case of
When the breaker on the inverter input side trips, the wiring must be
checked for fault (short circuit), and internal parts of the inverter for a
damage, etc. The cause of the trip must be identified and removed before
turning ON the power of the breaker.
When a protective function activates, take an appropriate corrective
action, then reset the inverter, and resume the operation.
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.
The inverter must be treated as industrial waste.
Many of the diagrams and drawings in the Instruction Manual show the
product without a cover or partially open for explanation. Never operate
the product in this manner. The cover must be always reinstalled and the
instruction in the Instruction Manual must be followed when operating the
product. For more details on the PM motor, refer to the Instruction Manual
of the PM motor.
key may not stop output depending on the