YASKAWA CIMR-G5A Series - Troubleshooting Autotuning Faults for Open-Loop Vector Control

Basic Operation
6.2.2 Autotuning Faults
6-20
Table 6.2 Troubleshooting Autotuning Faults for Open-loop Vector Control
Fault Display Probable Cause Remedy
Data Invalid
(Motor data fault)
There was a fault in the data
set during autotuning.
There was a fault in the rela-
tionship between the rated
frequency, rated speed, and
number of poles.
Change the settings to conform to the follow-
ing equation:
Rated speed < 120 × Motor frequency/Num-
ber of poles
A load is connected to the
motor.
Remove the load.
ALARM: Over Load
(Excessive
tuning
load)
The effective load factor ex-
ceeded 20% during autotun-
i
There was a setting fault dur-
ing autotuning.
Check the rated current setting. Change if
necessary.
(E
xcess
i
ve
t
un
i
ng
l
oa
d)
g
ing.
There is a motor bearing
problem.
Turn the Inverter off and rotate the motor by
hand.
Replace the motor if it doesn’t turn smoothly.
Motor speed
The torque reference value
exceeded
100%
during
auto
There is a broken/discon-
nected motor power wire.
Check and replace wiring components if nec-
essary.
Motor
speed
(Motor speed fault)
exceeded 100% during auto-
tuning.
A load is connected to the
motor.
Remove the load.
The torque limit function is
operating.
Initialize the torque limit constants (H7-01 to
H7-04).
Accelerate
(Acceleration fault)
The motor doesn’t accelerate
within the prescribed time.
The acceleration time is too
short.
Increase acceleration time 1 (C1-01).
(Acceleration
fault)
p
A load is connected to the
motor.
Remove the load.
Rated Slip
(Rated slip fault)
The rated slip setting can’t
be tuned within the pre-
scribed time.
A load is connected to the
motor.
Remove the load.
Saturation -1
(Iron core saturation coefficient
1 fault)
The core-saturation coeffi-
cients
can
’
t
be
tuned
within
The rated current setting isn’t
correct.
Check and change the setting if necessary.
Saturation -2
(Iron core saturation coefficient
2 fault)
cients can’t be tuned within
the prescribed time.
There is a broken/discon-
nected motor power wire.
Check and replace wiring components if nec-
essary.
Resistance
(Line-to-line resistance fault)
The motor terminal resis-
tance or no-load current set-
The rated current setting isn’t
correct.
Check and change the setting if necessary.
No-load Current
(No-load current fault)
tance
or
no-load
current
set-
ting can’t be tuned within the
prescribed time.
There is a broken/discon-
nected motor power wire.
Check and replace wiring components if nec-
essary.
Tune Aborted
Minor Fault: VVV
---
A minor Inverter fault oc-
curred.
Check the minor fault indicated in the boxes
in the display shown at the left.
V/f Over Setting
The torque command ex-
ceeded 100%, and the no-
load
current
exceeded
70%
The rated voltage and rated
frequency settings are incor-
rect.
Check and adjust the settings.
V/f
Over
Setting
load current exceeded 70%
of the motor’s rated current.
A load is connected to the
motor.
Disconnect the load from the motor.
6