Chapter 4 Running The Motor For A Test; Checking Prior To Powering On; Powering On And Checking - Fuji Electric FRENIC-HVAC Manual

Chapter 4 RUNNING THE MOTOR FOR A TEST

4.1 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
4.1.
(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.

4.2 Powering ON and Checking

Turn the power ON and check the following points. The following is a
case when no function code data is changed from the factory defaults.
Check that the LCD monitor displays 0.00 Hz (indicating that the
reference frequency is 0 Hz) that is blinking. (See Figure 4.2.)
If the LCD monitor displays any number except 0.00 Hz, press the
/ key to set 0.00 Hz.
The reactor in the inverter may generate noise due to source voltage distortion, which is not abnormal.
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Figure 4.1 Connection of Main Circuit Terminals
4-1
Figure 4.2 Display of the LCD Monitor
after Power-ON