The Inverter - Mitsubishi Electric FR-A800 Instruction Manual

Caution
Usage
 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 400V 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 examined.
 Stop status cannot be hold by the inverter's brake function.
In addition to the inverter's brake function, a holding device
must be installed to ensure safety.
 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
beforeyou touch the product.
 Only one PM motor can be connected to an inverter.
 An PM motor must be used under PM sensorless vector
control. Do not use a synchronous motor, induction motor,
or synchronous induction motor.
 Do not connect an PM motor in the induction motor control
settings (initial settings). Do not use an induction motor in
the PM sensorless vector control settings. It will cause a
failure.
 In the system with an PM motor, the inverter power must be
turned ON before closing the contacts of the contactor at
the output side.
Emergency stop
 A safety backup such as an emergency brake must be
provided to prevent hazardous conditions to the machine
and equipment in case of inverter failure.
 When the breaker on the inverter input side trips, thewiring
must be checked for fault (short circuit), and internalparts of
the drive unit 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.
Disposal
 The inverter must be treated as industrial waste.
General instruction
 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.
Caution
Waterproof and dustproof performances
 The inverter is rated with an IPX5
IP5X dustproof rating when the operation panel (FR-DU08-

01), the front cover, the wiring cover, and the cable glands
are securely fixed with screws.
 The items enclosed with the inverter such as the Instruction
Manual or CD are not rated with the IPX5 waterproof or IP5X
dustproof ratings.
 Although the inverter is rated with the IPX5 waterproof and
IP5X dustproof ratings, it is not intended for use in water.
Also, the ratings do not guarantee protection of the inverter
from needless submersion in water or being washed under
strong running water such as a shower.
 Do not pour or apply the following liquids over the inverter:
water containing soap, detergent, or bath additives; sea
water; swimming pool water; warm water; boiling water; etc.
 The inverter is intended for indoor
outdoor installation. Avoid places where the inverter is
subjected to direct sunlight, rain, sleet, snow, or freezing
temperatures.
 If the operation panel (FR-DU08-01) is not installed, if the
screws of the operation panel are not tightened, or if the
operation panel is damaged or deformed, the IPX5
waterproof performance and the IP5X dustproof
performance are impaired. If any abnormalities are found on
the operation panel, ask for an inspection and repair.
 If the screws of the front cover or the wiring cover are not
tightened, if any foreign matter (hair, sand grain, fiber, etc.)
is stuck between the inverter and the gasket, if the gasket is
damaged, or if the front cover or the wiring cover is
damaged or deformed, the IPX5 waterproof performance
and the IP5X dustproof performance are impaired. If any
abnormalities are found on the front cover, wiring cover, or
the gasket of the inverter, ask for an inspection and repair.
 Cable glands are important components to maintain the
waterproof and dustproof performances. Be sure to use
cable glands of the recommended size and shape or
equivalent. The standard protective bushes cannot
sufficiently maintain the IPX5 waterproof performance and
the IP5X dustproof performance.
 If a cable gland is damaged or deformed, the IPX5
waterproof performance and the IP5X dustproof
performance are impaired. If any abnormalities are found on
the cable glands, ask the manufacturer of the cable glands
for an inspection and repair.
 To maintain the waterproof and dustproof performances of
the inverter, daily and periodic inspections are
recommended regardless of the presence or absence of
abnormalities.

IPX5 refers to protection of the inverter functions against water jets from
any direction when about 12.5-liter water
an inside diameter of 6.3 mm from the distance of about 3 m for at least 3
minutes.

IP5X refers to protection of the inverter functions and maintenance of
safety when the inverter is put into a stirring device containing dust of 75
µm or smaller in diameter, stirred for 8 hours, and then removed from the
device.

Water here refers to fresh water at room temperature (5 to 35°C).

Indoor here refers to the environments that are not affected by climate
conditions.
Safety Instructions
waterproof rating and an

installation and not for

is injected from a nozzle with

3