Troubleshooting Autotuning Faults For Open-Loop Vector Control - YASKAWA VARISPEED-616G5 Instruction Manual

Basic Operation
6.2.2 Autotuning Faults
Fault Display
Data Invalid
(Motor data fault)
ALARM: Over Load
(Excessive tuning load) (Excessive tuning load)
Motor speed Motor speed
(Motor speed fault)
Accelerate
(Acceleration fault) (Acceleration fault)
Rated Slip
(Rated slip fault)
Saturation -1
(Iron core saturation coefficient
1 fault)
Saturation -2
(Iron core saturation coefficient
6
2 fault)
Resistance
(Line-to-line resistance fault)
No-load Current
(No-load current fault)
Tune Aborted
Minor Fault: VVV
V/f Over Setting V/f Over Setting
Table 6.2

Troubleshooting Autotuning Faults for Open-loop Vector Control

Probable Cause
There was a fault in the data
set during autotuning.
The effective load factor ex-
ceeded 20% during autotun- g
ing. i
The torque reference value
exceeded 100% during auto- exceeded 100% during auto
tuning.
The motor doesn't accelerate
within the prescribed time. p
The rated slip setting can't
be tuned within the pre-
scribed time.
The core-saturation coeffi-
cients can't be tuned within cients can't be tuned within
the prescribed time.
The motor terminal resis-
tance or no-load current set- tance or no-load current set-
ting can't be tuned within the
prescribed time.
---
The torque command ex-
ceeded 100%, and the no-
load current exceeded 70% load current exceeded 70%
of the motor's rated current.
6 - 20
There was a fault in the rela- Change the settings to conform to the follow-
tionship between the rated ing equation:
frequency, rated speed, and Rated speed < 120 × Motor frequency/Num-
number of poles. ber of poles
A load is connected to the
Remove the load.
motor.
There was a setting fault dur- Check the rated current setting. Change if
ing autotuning. necessary.
Turn the Inverter off and rotate the motor by
There is a motor bearing
hand.
problem.
Replace the motor if it doesn't turn smoothly.
There is a broken/discon- Check and replace wiring components if nec-
nected motor power wire. essary.
A load is connected to the
Remove the load.
motor.
The torque limit function is Initialize the torque limit constants (H7-01 to
operating. H7-04).
The acceleration time is too
Increase acceleration time 1 (C1-01).
short.
A load is connected to the
Remove the load.
motor.
A load is connected to the
Remove the load.
motor.
The rated current setting isn't
Check and change the setting if necessary.
correct.
There is a broken/discon- Check and replace wiring components if nec-
nected motor power wire. essary.
The rated current setting isn't
Check and change the setting if necessary.
correct.
There is a broken/discon- Check and replace wiring components if nec-
nected motor power wire. essary.
A minor Inverter fault oc- Check the minor fault indicated in the boxes
curred. in the display shown at the left.
The rated voltage and rated
Check and adjust the settings.
frequency settings are incor-
rect.
A load is connected to the
Disconnect the load from the motor.
motor.
Remedy