Chapter 14 Fault Codes and DescriptionsME300
14-10
Cause Corrective Actions
The load is too large. Reduce the load.
Accel./Decel. time and 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.01-01–01-08 (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 of Pr.01-43.
Overload during low-speed
operation.
When using a 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.06-13=0 (electronic
thermal relay selection motor 1 = 0
inverter motor)
Pr.06-13=1 electronic thermal relay selection motor 1 = 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.06-13=2 electronic thermal relay selection motor 1 = 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.07-26 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.
ID No. Display on LCM 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 output current > 150% of motor 2 rated current.
Action time
Pr.06-28 (If the output current is larger than 105% of 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 5 sec. after the fault is cleared.
Record Yes
Cause Corrective Actions
The load is too large. Reduce the load.
Accel./Decel. time and 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.01-01–01-08 (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 a 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).
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