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 Additional Instructions
The following instructions must be also followed. If the product
is handled incorrectly, it may cause unexpected fault, an injury,
or an electric shock.
Caution
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 recommended.
 When carrying the inverter, do not hold it by the front cover;
it may fall off or fail.
 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 the inverter.
 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 impact.
 The ambient temperature 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
page 18
for details.)
 The storage temperature (applicable for a short time, e.g.
during transit) must be between -20 and +65°C. Otherwise
the inverter may be damaged.
 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 of 2500 m or less
above sea level, with vibration at 5.9 m/s
Hz (directions of X, Y, Z axes). Otherwise the inverter may
be damaged. (Refer to
page 18
 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.
Wiring
 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 shock.
 Never connect an PM motor to the commercial power
supply.
Applying the commercial power supply to input terminals
(U,V, W) of an PM motor will burn the PM motor. The PM
motor must be connected with the output terminals (U, V, W)
of the inverter.
Trial run
 Before starting operation, each parameter must be
confirmed and adjusted. A failure to do so may cause some
machines to make unexpected motions.
2

2.9 m/s
or less for the FR-A846-01800(55K) or higher.
2
Safety Instructions
2
or less, 10 to 55

for details.)
Warning
Usage
 Everyone must stay away from the equipment when the
retry function is set as it will restart suddenly after a trip.
Since pressing a key may not stop output depending
on the 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 motor suddenly.
 Do not use an 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 an PM motor. Connection of any other electrical
equipment to the inverter output may damage the
equipment.
 Performing pre-excitation (LX signal and X13 signal) under
torque control (Real sensorless vector control) may start
the motor running at a low speed even when the start
command (STF or STR) is not input The motor may run also
at a low speed when the speed limit value = 0 with a start
command input. It must be confirmed that the motor
running will not cause any safety problem before
performing pre-excitation.
 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.

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