Trial Operation
5.2.5 Autotuning
5-8
Display Message CountermeasureDescriptionFault
Accelerate Acceleration fault
The motor did not accelerate with-
in a set time.
S Increase the acceleration time (C1-01).
S Increase the torque limits (L7-01, -02) if
these have been decreased.
S Disconnect the motor from the machine if
it has been connected.
PG Direction Motor direction fault
There is a contact fault between
the Inverter, PG (phase A and B),
and motor (phases U, V, and W)
S Check the PG wiring.
S Check the motor wiring.
S Check the PG direction and constant
F1-05.
Motor speed Motor speed fault
The torque reference was too large
(100%) during autotuning.
S Disconnect the motor from the machine if
it has been connected.
S Increase the acceleration time (C1-01).
S Check the input data (particularly the num-
ber of PG pulses).
ALARM: Over Load
(Displayed after completion of
autotuning)
Tuning overload fault
The torque reference was over
20% during autotuning.
Check the input data (particularly the num-
ber of PG pulses) if the motor is being auto-
tuned separately.
Tune Aborted
Minor Fault:
VVV
Minor fault
A minor Inverter fault occurred.
Check the minor fault indicated in the boxes
in the display shown at the left.
V/f Over Setting
The torque command exceeded
100%, and the no-load current ex-
S Check and adjust settings if necessary.
V/f setting exceeded
,
ceeded 70% of the motor’s rated
current.
S Remove the load from the motor.
D
Fault displays can be cleared by pressing the MENU Key.
D
All set constants (motor constants) will be initialized if a fault occurs. Reset the constants from the
beginning when before starting autotuning again.
D
Inverter software Nos. VSG101020 to VSG101026 will display “ALARM: Over Load” when the
torque command exceeds 100%.
J Switching to V/f Control when Autotuning Is Not Successful
When autotuning has not been executed correctly (i.e., when “Tune Aborted” is displayed), switch the con-
trol method to “V/f control” and set the V/f pattern.
1. Change the control method to V/f control without PG.
Step Key Sequence Digital Operator Display Remarks
1
MENU
G5: Main Menu :
Operation
Displays operation mode.
2
: Main Menu :
Initialize
Displays initialize mode.
3
DATA
ENTER
Select Language
English
Puts the Unit in initialize mode. (Se-
lect Language display)
4
Press twice.
Control Method
Open Loop Vector
The control method selection is dis-
played.
5
DATA
ENTER
A1-02 = 2 :::
Open Loop Vector
Control method selection (A1-02) is
displayed.
6
Press twice.
A1-02 = 0
V/f Control
Selects V/f control.
7
DATA
ENTER
Entry Accepted
The set values are overwritten.
Control Method
V/f Control
Returns to the control method select
display.
8
MENU
G5: Main Menu :
Operation
Returns to the operation mode dis-
play.
5
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