YASKAWA F7 User Manual

Diagnostics & Troubleshooting 6 - 18
Table 6.4 Auto-Tuning Fault Displays and Processing (continued)
Digital Operator
Display
Description Probable Cause Corrective Action
Er - 12
I-det. Circuit
Current Detection Fault
•Current exceeded the motor rated
current.
•Any of U/TI, V/T2, and W/T3 has
open-phase.
• 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).
Er - 13
Leakage
Inductance Fault
Leakage Inductance Fault
Auto-Tuning did not finish within
the set time.
Auto-Tuning result is outside the
parameter setting range.
• Check Auto-Tuning input data (T1
parameters).
• Check motor wiring for proper
connection configuration.
End - 1
V/F Over Setting
V/F Settings Alarm
Displayed after Auto-Tuning is
complete.
The torque reference exceeded
100%, and the no-load current
exceeded 70% during Auto-Tuning.
• Check and correct the motor
settings (T1 parameters).
• If the motor is coupled to the load,
disconnect the motor from the
load.
End - 2
Saturation
Motor Core Saturation Fault
Detected only for rotational
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.
• 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.
End - 3
Rated FLA Alm
Rated Current Setting Alarm
Displayed after Auto-Tuning is
complete.
During Auto-Tuning, the measured
value of motor rated current (E2-01)
was greater than the set value.
• Check the motor rated current
value (E2-01).
End - 4
Slip Lower Limit
<3021>
Slip Lower Limit
Adjusted slip value fell below the
lower limit.
During stationary Auto-Tuning, the
slip value has fallen to 0.2 Hz or
below.
• Check the input data.
• Perform a Rotational Auto-Tuning.
if possible. If not possible, perform
a stationary Auto-Tuning 2.
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YASKAWA F7 Specifications

General

Series	F7
Type	DC Drive
Feedback	Tachometer, Encoder
Communication	RS-485, DeviceNet, Profibus, Modbus
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheating, Short Circuit
Storage Temperature	-20°C to +70°C (-4°F to 158°F)
Humidity	95% RH or less (non-condensing)
Enclosure Rating	IP20
Input Voltage	200-240V AC, 380-480V AC