Start-Up; Preparations; Before Switching On The Inverter For The First Time; Important Settings Before Switching On The Motor For The First Time - Mitsubishi Electric FR-A800 Series Beginner's Manual

Start-up

4 Start-up
4.1

Preparations

4.1.1

Before switching on the inverter for the first time

Check all the following points carefully before switching on a frequency inverter for the first time:
● Has all the wiring been performed correctly? Check the power supply connections particularly
carefully: 3-phase to R/ L1, S/L2 and T/L3.
● Double-check for damaged cables and insufficiently insulated terminals to eliminate any possi-
bility of short circuits.
● Is the inverter properly earthed? Double-check for possible earth faults and short circuits in the
output circuit.
● Check that all screws, connection terminals and other cable connections are connected correctly
and firmly.
4.1.2

Important settings before switching on the motor for the first time

All settings necessary for the operation of the inverter, like acceleration and deceleration times or the
trigger threshold for the electronic motor protection relay, are programmed and changed with the
parameter unit.
The following settings must be checked before switching on the motor for the first time:
● Maximum output frequency (parameter 1)
● V/f pattern (parameter 3)
● Acceleration and deceleration times (parameters 7 and 8)
See chapter 6 for detailed descriptions of these parameters and what they are for. See section 5.4 for
examples of parameter settings.
CAUTION:
E
Incorrect parameter settings can damage or (in extreme cases) even destroy the connected
motor. Take great care when you are setting the parameters and double-check the electrical
and mechanical specifications of the motor, your entire drive system and the connected ma-
chine before proceeding.
Frequency Inverters - Beginner's Guide
Preparations
4 - 1