SJ100 Inverter
Operations
and Monitoring
4–31
NOTE: During step 11, the motor will make a slight humming sound during the AC and
DC excitation (A and B) steps of the auto-tuning process. This sound is normal.
NOTE: When the SLV control method is selected with A44 (F-04), set the carrier
frequency to 2.1 kHz or higher with B83 (F-36).
If the inverter drives a motor/load with a small inertia, the motor may exhibit “hunting”
during running. If this occurs, take the following corrective steps:
1. Adjust the stabilization constant H06/H206 (F-05).
2. Decrease the carrier frequency B83 (F-36), but not below 2.1 kHz.
3. Set the Automatic Voltage Regulation (AVR) function A81 (F-03) to the Off setting
(disabled = 01).
8 A82 AVR voltage select Select output voltage for motor
200V class: 200/220/230/240
400V class: 380/400/415/440/
460
Voltage setting cannot be greater
than input voltage
9 A51 DC braking enable Set = 00 to disable DC braking Default = 00 (disabled)
10 H01 Auto-tuning
Setting
Set = 01 (full auto-tuning
Set = 02 (partial auto-tuning –
measures resistance and induc-
tance only)
Try using H01 = 01, if possible.
If application or load interferes
with or prohibits motor rotation,
then use H01 = 02.
11 ——Press the RUN key on the
keypad and wait for the test to
complete
The inverter actions are:
A) .. AC excitation (no rotation)
B) .. DC excitation (no rotation)
C) .. Motor accelerates to 80% of
base frequency, then stops.
D) Motor accelerates to A20
setting frequency, then stops.
12 ——Interpret results by reading the
display pattern
Auto-tuning process completed
steps A) to D)
Auto-tuning failed at
step A) or B)
13 ——Reset Inverter by pressing the
Stop/Reset Key
Inverter will display alternating
pattern on the display and return
to parameter menu. Auto-tuning
will be off. Make any corrections
and start again at step 10.
Step
Parameter
Parameter Setting or Action Notes
Code Name
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