Mitsubishi Electric FR-A800 Series Beginner's Manual page 45

Start-up
● Controlling the inverter using the PU
.
The inverters of the FR-A800 series can be controlled directly using the standard parameter unit
or an optional parameter unit. This makes it possible to perform the functional test without
connecting anything to the control inputs.
Please note that when the inverter is switched on for the first time control via external signals is
activated by default. Press the PU/EXT key of the parameter unit FR-DU08 (HAND/AUTO key for
FR-DU08-01) to select the PU operation mode (see section 5.2).
NOTE Don't install a permanent jumper between PC and e.g. STF terminal to switch the motor on and off
by turning the frequency inverter's power on and off. Because this will reduce inverter life time.
Repeated switching of the inverter's mains power supply at short intervals can damage the inrush
current limiter. Switch the inverter's power supply on first and then control the motor with the for-
ward/reverse commands via terminals STF and STR or with the PU.
Performing the test
During the test run pay particular attention to the following points:
● The motor should not generate any unusual noises or vibrations.
● Changing the frequency setting value should change the speed of the motor.
● If a protective function triggers during motor acceleration or deceleration check:
– Motor load
– Acceleration and deceleration times (you may need to increase these times with parameters
7 and 8)
– The manual torque boost setting (parameter 0)
These parameters are described in chapter 6.
Frequency Inverters - Beginner's Guide
Motor circuit
breaker
Q1
I
Power
I
supply
I
PE
Inverter
R/L1 U
S/L2 V
W
T/L3
PC
STR
STF
10
2
5
Functional test
4 - 3