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SJ300 Inverter
Inverter Mounting
and Installation
2–29
Monitoring
Parameters with
the Display
After using the keypad for parameter
editing, it’s a good idea to switch the
inverter from Program Mode to Monitor
Mode. This will turn out the PRG LED, and
the Hertz, Volt, Ampere, or % LED
indicates the display units.
For the powerup test, monitor the motor speed indirectly by viewing the inverter’s output
frequency. The output frequency must not be confused with base frequency (50/60 Hz) of the
motor, or the carrier frequency (switching frequency of the inverter, in the kHz range). The
monitoring functions are in the “D” list, located near the top left of the diagram in the “
Keypad
Navigational Map” on page 2–25.
Output frequency (speed) monitor - Resuming the keypad programming from the previous
table, follow the steps in the table below.
When the
d
001 function code appeared, the PRG LED went OFF. This confirms the inverter is
no longer in programming mode, even while you are selecting the particular monitoring param-
eter. After pressing the FUNC. key, the display shows the current speed (is zero at this point).
Running the
Motor
If you have programmed all the parameters up to this point, you’re ready to run the motor!
First, review this checklist:
1. Verify the Power LED is ON. If not, check the power connections.
2. Verify the Run Key Enable LED is ON. If not, review the programming steps to find the
problem.
3. Verify the PRG LED is OFF. If it is ON, review the instructions above.
4. Make sure the motor is disconnected from any mechanical load.
5. Turn the potentiometer to the MIN position (completely counterclockwise).
6. Now, press the RUN key on the keypad. The RUN LED will turn ON.
7. Slowly increase the potentiometer setting in clockwise fashion. The motor should start
turning when the indicator is in the 9:00 position and beyond.
8. Press the STOP key to stop the motor rotation.
Action Display Func./Parameter
Press the key.
“H” Group selected
Press the key.
Output frequency selected
Press the key.
Output frequency displayed
1
2
50.0
RUN
STOP
RESET
FUNC.
STR
RUN
PRG
POWER
ALARM
HZ
A
V
kW
%
MIN MAX
HITACHI
FUNC.
H–––
1
d
001
FUNC.
0.00