Chapter 14 Fault CodesMS300
568
Electronic thermal
relay 2 protection
(EoL2)
Electronic thermal relay 2 protection. The drive coasts
to stop once it activates.
Start counting when the output current > 150% of the motor 2 rated current
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
Reset in five seconds after the fault is cleared
Accel./Decel. time or the working
cycle are too short
Increase the setting values for Pr.01-12–01-19 (accel./decel. time)
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).
Refer to 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 (refer to Pr.07-71 torque compensation gain)
until the current reduces and the motor does no stall.
Check the status of the fan, or replace the fan.
Unbalanced three-phase
impedance of the motor
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