Omron VARISPEED L7 User Manual

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7
 Auto-tuning Faults
Auto-tuning faults are shown below. When the following faults are detected, the fault is displayed on the digi-
tal operator and the motor coasts to stop. No fault or alarm outputs will be operated.
Table 7.5 Auto-tuning Faults
Display Meaning Probable causes Corrective Actions
Fault Motor data fault
There is an error in the data input for
autotuning.
Check the input data.
There is an error in the relationship
between the motor output and the
motor rated current.
Check the Inverter and motor
capacity.
There is an error between the no-load
current setting and the input motor
rated current (when auto-tuning for
line-to-line resistance is performed for
vector control)
Check the motor rated current and
no-load current.
Minor Fault Alarm
An alarm is detected during auto-tun-
ing.
Check the input data.
Check wiring and the machine.
Check the load.
STOP key STOP key input
The STOP key was pressed to cancel
autotuning.
-
Resistance Line-to-Line Resistance Fault
Autotuning was not completed in the
specified time.
The auto-tuning result is outside the
parameter setting range.
• Check the input data.
• Check the motor wiring.
• If the motor is connected to the
machine, disconnect it.
• If the setting of T1-03 is higher
than the Inverter input power
supply voltage (E1-01), change
the input data.
No-Load Current No-Load Current Fault
Rated slip Rated Slip Fault
Accelerate
Acceleration error (detected during
rotating autotuning only)
The motor did not accelerate in the
specified time.
Rotating autotuning was performed
with a high load connected.
• Increase C1-01 (Acceleration
Time 1).
• Increase L7-01 and L7-02
(Torque Limits) if they are low.
• Remove the ropes and repeat the
tuning.
Motor Speed
Motor Speed Fault
Detected only for rotating autotuning
The torque reference exceeded 100%
during acceleration.
Detected only when A1-02 is set to 2
(Open Loop Vector control).
• If the motor is connected to the
machine, disconnect it.
• Increase C1-01 (Acceleration
Time 1).
• Check the input data (particu-
larly the number of PG pulses
and the number of motor poles).
• Perform not rotating auto tuning
I-det. Circuit Current Detection Fault
The current exceeded the motor rated
current.
Check wiring of the Inverter and
the mounting.
Any of U/T1, V/T2 and W/T3 has
open-phase

Omron VARISPEED L7 Specifications

General

Brand	Omron
Model	VARISPEED L7
Category	Inverter
Language	English