Mitsubishi Electric FR-D720-008 Instruction Manual page 2

Thank you for choosing this Mitsubishi Inverter.
This Instruction Manual provides instructions for advanced use of the FR-D700 series inverters.
Incorrect handling might cause an unexpected fault. Before using the inverter, always read this instruction manual
and the Installation Guideline [IB-0600367ENG] packed with the product carefully to use the equipment to its
optimum performance.
This section is specifically about safety matters
Do not attempt to install, operate, maintain or inspect the
inverter until you have read through the Instruction Manual
and appended documents carefully and can use the
equipment correctly. Do not use this product until you have
a full knowledge of the equipment, safety information and
instructions.
In this Instruction Manual, the safety instruction levels are
classified into "WARNING" and "CAUTION".
Assumes that incorrect handling may
WARNING
cause hazardous conditions, resulting
in death or severe injury.
Assumes that incorrect handling may
CAUTION
cause hazardous conditions, resulting
in medium or slight injury, or may
cause physical damage only.
CAUTION
Note that even the
consequence according to conditions. Please follow the
instructions of both levels because these are important to
personnel safety.
level may lead to a serious
1. Electric Shock Prevention
WARNING
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 or wiring 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, switch OFF power,
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 (grounded). Earthing
(grounding) must conform to the requirements of national
and local safety regulations and electrical code. (NEC
section 250, IEC 536 class 1 and other applicable
standards)
Use an neutral-point earthed (grounded) power supply for
400V class inverter in compliance with EN standard.
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.
Perform setting dial and key operations 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. It is
dangerous to change the cooling fan while power is ON.
Do not touch the printed circuit board with wet hands.
Otherwise, 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.
2. Fire Prevention
CAUTION
Install the inverter on a nonflammable wall without holes
(so that nobody can touch the inverter heatsink on the rear
side, etc.). Mounting it to or near flammable material can
cause a fire.
If the inverter has become faulty, switch off the inverter
power. A continuous flow of large current could cause a
fire.
When using a brake resistor, make up a sequence that will
turn off power when an alarm signal is output. 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/-. This could cause a fire.
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