Mitsubishi Electric FR-A820-00046 Instruction Manual page 6

Electric Shock Prevention
WARNING:
P
● While power is on or when the inverter is running, do not open the front cover. Otherwise you
may get an electric shock.
● Do not run the inverter with the front cover removed. Otherwise, you may access the exposed
high-voltage terminals or the charging part of the circuitry and get an electric shock.
● Even if power is off, do not remove the front cover except for wiring or periodic inspection.You
may access the charged inverter circuits and get an electric shock.
● Before starting wiring or inspection, check to make sure that the operation panel indicator
is off, wait for at least 10 minutes after the power supply has been switched 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.
● This inverter must be earthed. Earthing must conform to the requirements of national and
local safety regulations and electrical codes (JIS, NEC section 250, IEC 536 class 1 and other
applicable standards). A neutral-point earthed power supply for 400V class inverter in
compliance with EN standard must be used.
● Any person who is involved in the wiring or inspection of this equipment should be fully
competent to do the work.
● Always install the inverter before wiring. Otherwise, you may get an electric shock or be
injured.
● If your application requires by installation standards an RCD (residual current device) as up
stream protection please select according to DIN VDE 0100-530 as following:
Single phase inverter type A or B
Three phase inverter only type B
● Perform setting dial and key operations with dry hands to prevent an electric shock. Other-
wise 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 replace the cooling fan while power is on. It is dangerous to replace the cooling fan
while power is on.
● Do not touch the printed circuit board or handle the cables with wet hands. You may get an
electric shock.
● When measuring the main circuit capacitor capacity, the DC voltage is applied to the motor
for 1s at powering OFF. Never touch the motor terminal, etc. right after powering OFF to
prevent an electric shock.
● A PM motor is a synchronous motor with high-performance magnets embedded in the rotor.
Motor terminals holds high-voltage while the motor is running even after the inverter power
is turned OFF. Before wiring or inspection, the motor must be confirmed to be stopped. In an
application, such as fan and blower, where the motor is driven by the load, a low-voltage
manual motor starter must be connected at the inverter's output side, and wiring and
inspection must be performed while the motor starter is open. Otherwise you may get an
electric shock.
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