Fire Prevention - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

Electric shock prevention
WARNING
 Do not remove the front cover or the wiring cover while the inverter power is ON, and do not run the inverter with the
front cover or the wiring cover removed as the exposed high voltage terminals or the charging part of the circuitry can
be touched. Otherwise you may get an electric shock.
 Even if power is OFF, do not remove the front cover except for wiring or periodic inspection as the inside of the inverter
is charged. Otherwise you may get an electric shock.
 Before wiring or inspection, check that the LED display of the operation panel is OFF. Any person who is involved in
wiring or inspection shall wait for 10 minutes or longer after the power supply has been cut off, and check that there are
no residual voltage using a tester or the like. The capacitor is charged with high voltage for some time after power OFF,
and it is dangerous.
 The inverter must be earthed (grounded). Earthing (grounding) must conform to the requirements of national and local
safety regulations and electrical code (NEC section 250, IEC 61140 class 1 and other applicable standards). A neutral-
point earthed (grounded) power supply must be used for 400 V class inverter to be compliant with EN standard.
 Any person who is involved in wiring or inspection of this product shall be fully competent to do the work.
 The product body must be installed before wiring. Otherwise you may get an electric shock or be injured.
 Setting dial and key operations must be performed with dry hands to prevent an electric shock. Otherwise you may get
an electric shock.
 Do not subject the cables to scratches, excessive stress, heavy loads or pinching. Otherwise you may get an electric
shock.
 Do not change the cooling fan while power is ON as it is dangerous.
 Do not touch the printed circuit board or handle the cables with wet hands. Otherwise you may get an electric shock.
 Never touch the motor terminals, etc. right after powering OFF as the DC voltage is applied to the motor for 1 second at
powering OFF if the main circuit capacitor capacity is measured. Otherwise you may get an electric shock.
 Before wiring or inspection for a PM motor, confirm that the PM motor is stopped as a PM motor is a synchronous motor
with high-performance magnets embedded inside and high-voltage is generated at the motor terminals while the motor
is running even after the inverter power is turned OFF. In an application, such as fan and blower, that the motor may be
driven by the load, connect a low-voltage manual contactor at the inverter's output side and keep it open during wiring
and inspection of the inverter. Otherwise you may get an electric shock.
Fire prevention
CAUTION
 The inverter must be installed on a nonflammable wall without any through holes so that nobody touches the heatsink,
etc. on the rear side of the inverter. Installing it on 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.
 When using a brake resistor, a sequence that will turn OFF power when a fault signal is output must be configured.
Otherwise the brake resistor may excessively overheat due to damage of the brake transistor and such, causing 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 this product is used without
any inspection, a burst, breakage, or a fire may occur.
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