YASKAWA F7 User Manual page 143

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Digital Operator
Display
Er - 12
Current Detection Fault
I-det. Circuit
Er - 13
Leakage
Leakage Inductance Fault
Inductance Fault
V/F Settings Alarm
End - 1
Displayed after Auto-Tuning is
V/F Over Setting
complete.
Motor Core Saturation Fault
End - 2
Detected only for rotational
Saturation
Auto-Tuning.
Rated Current Setting Alarm
End - 3
Displayed after Auto-Tuning is
Rated FLA Alm
complete.
End - 4
Slip Lower Limit
Slip Lower Limit
Adjusted slip value fell below the
<3021>
lower limit.
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Table 6.4 Auto-Tuning Fault Displays and Processing (continued)
Description
Diagnostics & Troubleshooting 6 - 18
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Probable Cause
•Current exceeded the motor rated
current.
•Any of U/TI, V/T2, and W/T3 has
open-phase.
Auto-Tuning did not finish within
the set time.
Auto-Tuning result is outside the
parameter setting range.
The torque reference exceeded
100%, and the no-load current
exceeded 70% during Auto-Tuning.
During Auto-Tuning, the measured
values of motor iron-core saturation
coefficient 1 and 2 (E2-07 and
E2-08) exceeded its setting range. A
temporary value was set:
E2-07 = 0.75, E2-08 = 0.50.
During Auto-Tuning, the measured
value of motor rated current (E2-01)
was greater than the set value.
During stationary Auto-Tuning, the
slip value has fallen to 0.2 Hz or
below.
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Corrective Action
• Check that the motor is unloaded
(uncoupled and brake is released).
• Check Drive wiring and mounting.
• Check the motor connections for
continuity (on Drive output terminals
and in motor junction box).
• Check Auto-Tuning input data (T1
parameters).
• Check motor wiring for proper
connection configuration.
• Check and correct the motor
settings (T1 parameters).
• If the motor is coupled to the load,
disconnect the motor from the
load.
• Check Auto-Tuning input data (T1
parameters).
• Check the motor wiring.
• If the motor and the load are
connected, disconnect the motor
from the load.
• Check the motor rated current
value (E2-01).
• Check the input data.
• Perform a Rotational Auto-Tuning.
if possible. If not possible, perform
a stationary Auto-Tuning 2.
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