Operating Instructions

Fault Codes
Digital Keypad
317 | 443
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
23
Electronic thermal relay 2
protection (EoL2)
Electronic thermal relay 2 protection. The drive coasts to stop once
it activates.
Action and Reset
Action level
Start counting when the output current > 150% of the motor 2 rated current
Action time
Pr.06-28 (If the output current is larger than 105% of the motor 2 rated current again within 60
sec., the counting time reduces and is less than Pr.06-28)
Fault treatment parameter
N/A
Reset method
Manual reset
Reset condition
Reset in five seconds after the fault is cleared
Record
Yes
Cause
Corrective Actions
The load is too large
Reduce the load
Accel./Decel. time or the working cycle are
too short
Increase the setting values for Pr.01-12–01-19 (accel./decel. time)
V/F voltage is too high
Adjust the settings for Pr.01-35–01-42 (V/F curve), especially the setting value for the mid-point
voltage (if the mid-point voltage is set too low, the load capacity decreases at low speed).
See the V/F curve selection setting of Pr.01-43.
Overload during low-speed operation.
When using general motor, even it
operates below rated current, an overload
may still occur during low-speed
operation.
Decrease low-speed operation time.
Replace the drive with a dedicated to VFD model.
Increase the motor capacity.
When using VFD dedicated motors, Pr.06-
27=0 (electronic thermal relay selection
motor 2 = 0 inverter motor)
Pr.06-27=1 Electronic thermal relay selection motor 2 = standard motor (motor with fan on the
shaft).
Incorrect value of electronic thermal relay
Reset to the correct motor rated current.
The maximum motor frequency is set too
low
Reset to the correct motor rated frequency.
One drive to multiple motors
Set Pr.06-27=2 Electronic thermal relay selection motor 2 = disable, and install thermal relay on
each motor.
Check if the setting for stall prevention is
correct.
Set the stall prevention to the proper value.
Torque compensation is too large
Adjust the torque compensation (See Pr.07-71 torque compensation gain) until the current
reduces and the motor does no stall.
Motor fan error
Check the status of the fan, or replace the fan.
Unbalanced three-phase impedance of
the motor
Replace the motor.