IMPULSE
®
•G+ & VG+ Series 4 Technical Manual
November 2020
Page 217
6.3 Fault Display and Corrective Actions at Auto-Tuning
The following are fault displays and corrective actions at auto-tuning. If any of the following faults are found, the
keypad displays that fault contents; the motor coasts to stop if it is under operation. Fault contact output or minor
fault contact output does not operate.
Table 6-5: Fault Display and Corrective Actions
Fault Display Fault or Indicator Name/Description Corrective Action
Er-01
Fault
Motor Data Fault. Motor data input fault for auto-
tuning. Relationship between motor output and
motor rated current fault. Relationship between
input motor rated current and set no-load current
fault (at vector control method and line-to-line
resistance tuning.)
• Check input data.
• Check VFD and motor capacity.
• Check motor rated current and no-load current.
Er-02
Minor Fault
Alarm. The minor fault is detected during auto-
tuning.
• Check input data.
• Check wirings.
• Check load.
Er-03
STOP Key
STOP Key Input. The stop key is pressed during
auto-tuning.
Er-04
Resistance
Line to Line Resistance Fault. Auto-tuning is not
completed within the expected time. The auto-
tuning is outside the parameter setting.
• Check input data.
• Check motor wiring.
• If a motor and a load are connected, disconnect
the motor from machinery system.
Er-05
No-Load Current
No-load Current Fault. Auto-tuning is not
completed within the expected time. The auto-
tuning is outside the parameter setting.
Er-08
Rated Slip
Rated Slip Fault. Auto-tuning is not completed
within the expected time. The auto-tuning is
outside the parameter setting.
Er-09
Accelerate
Acceleration Fault. The motor did not accelerate
at the expected time.
• Increase B05-01 (acceleration time).
• If C07-01 and C07-02 (torque limit value) are
decreased, increase values.
• If a motor and a load are connected, separate
the motor from the load.
Er-10
Motor Direction
Motor Direction Error. The encoder signal lines
are not properly connected to the VFD; the motor
direction and PG direction are opposite; or the
load pulled the motor in the opposite direction of
the speed reference and the torque exceeded
100%.
• Check and correct wiring to the PG encoder.
• Check the motor speed monitor U01-05 while
manually turning the motor forward. If the sign
displayed is negative, change the setting of
parameter F01-02.
• Uncouple the motor from the load and restart
Auto-Tuning.
Er-11
Motor Speed
Motor Speed Fault (Rotation type tuning only).
The motor speed was over 100% at auto-tuning
(flux vector control without PG only).
• Increase B05-01 (acceleration time).
• If a motor and a load are connected, separate
the motor from the load.
Er-12
I.det.Circuit
Current Detection Fault. Current exceeded the
motor rated current.
• Release brake.
• Check for open motor lead.
Er-13
Leakage Inductance
Leakage Inductance Fault. Auto-tuning did not
finish within the set time.
• Check the T1 parameters.
• Check motor wiring.
End 1*
V/f Oversetting
Excess V/f setting (Rotation type tuning only).
The torque reference exceeded 100% and no load
current exceeded 70%.
• Check the T1 parameters.
• Disconnect the motor from the load.