Mitsubishi Electric 800 Series Instruction Manual page 3

Electric Shock Prevention
WARNING
 While the inverter power is ON, do not remove the front cover or the wiring cover. Do not run the
inverter with the front cover or the wiring cover removed, as accidental contact with exposed high-
voltage terminals and internal components may occur, resulting in an electrical shock.
 Even if power is OFF, do not remove the front cover except for wiring or periodic inspection. You may
accidentally touch the charged inverter circuits and get an electric shock.
 Before wiring or inspection, the power lamp must be switched OFF. Any person who is involved in
wiring or inspection shall 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 (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).
 Any person who is involved in wiring or inspection of this equipment shall be fully competent to do the
work.
 The inverter 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. Doing so may
cause an electric shock.
 Do not change the cooling fan while power is ON. It is dangerous to change the cooling fan while
power is ON.
 Do not touch the printed circuit board or handle the cables with wet hands. Doing so may cause 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.
Fire Prevention
CAUTION
 Inverter must be installed on a nonflammable wall without holes (so that nobody touches the inverter
heat sink 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.
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