Checking Prior To Powering On - Fuji Electric FRENIC-HVAC User Manual

5.7.5

Checking prior to powering ON

Check the following before powering on the inverter.
(1) Check that the wiring is correct.
Especially check the wiring to the inverter input terminals L1/R, L2/S and L3/T and output
terminals U, V, and W. Also check that the grounding wires are connected to the grounding
terminals ( G) correctly. See Figure 5.17.
• Never connect power supply wires to the inverter output terminals U, V, and W. Doing so and turning the
power ON breaks the inverter.
• Be sure to connect the grounding wires of the inverter and the motor to the ground electrodes.
Otherwise, an electric shock could occur.
(2) Check the control circuit terminals and main circuit terminals for short circuits or ground faults.
(3) Check for loose terminals, connectors and screws.
(4) Check that the motor is separated from mechanical equipment.
(5) Make sure that all switches of devices connected to the inverter are turned OFF. Powering on
the inverter with any of those switches being ON may cause an unexpected motor operation.
(6) Check that safety measures are taken against runaway of the equipment, e.g., a defense to
prevent people from access to the equipment.
Inverter
G L1/R L2/S L3/T
Power
supply
Figure 5.17 Connection of Main Circuit Terminals
5-99
U V W G
Motor
5.7 Alarm Mode