Fuji Electric FRENIC-Multi - Chapter 4 RUNNING the MOTOR; Running the Motor for a Test; Inspection and Preparation Prior to Powering on; Turning on Power and Checking

4-1
Chapter 4 RUNNING THE MOTOR
4.1 Running the Motor for a Test
4.1.1 Inspection and preparation prior to powering on
Check the following prior to powering on.
(1) Check if connection is correct.
Especially check if the power wires are connected to the inverter input terminals L1/R, L2/S and
L3/T or L1/L and L2/N, and output terminals U, V and W respectively and that the grounding
wires are connected to the ground electrodes correctly. Refer to Figure 4.1.
• Do not connect power supply wires to the inverter output terminals U, V, and W. Otherwise, the
inverter may be broken if you turn the power ON.
• Be sure to connect the grounding wires of the inverter and the motor to the ground electrodes.
Otherwise, electric shock may occur.
(2) Check for short circuits between terminals and
exposed live parts and ground faults.
(3) Check for loose terminals, connectors and screws.
(4) Check if the motor is separated from mechanical
equipment.
(5) Turn the switches OFF so that the inverter does not
start or operate erroneously at power-on.
(6) Check if safety measures are taken against
runaway of the system, e.g., a defense to protect
people from unexpectedly approaching your powe
r
system.
Figure 4.1 Connection of Main Circuit
Terminals
4.1.2 Turning ON power and checking
• Be sure to install the terminal cover if any before turning the power ON.
Do not remove any cover while powering on.
• Do not operate switches with wet hands.
Otherwise electric shock could occur.
Turn the power ON and check the following points. This is a
case when no function code data is changed from the
factory setting.
(1) Check if the LED monitor displays
 (means that
the frequency command is 0 Hz) that is blinking. (See
Figure 4.2.)
If the LED monitor displays numbers except
 ,
press
/
keys to set  as the frequency
command.
(2) Check if a built-in cooling fan rotates.
(For the inverter of 1 HP or below, no cooling fan is
mounted.)
Figure 4.2 Display of the LED Monitor
after Power-on
(E.g. Wire connection for three-phase
power supply)