Chapter 13 Warning Codes
ME300
No. Display on LED Keypad Warning Name Description
25
Auto-tuning
(tUn)
Parameter auto-tuning is processing.
When running auto-tuning, the keypad displays “tUn”.
Action and Reset
Action condition When running Pr.05-00 motor parameter auto-tuning, the keypad displays “tUn”.
Action time N/A
Warning treatment parameter N/A
Reset method
When auto-tuning is finished and no error occurs, the warning automatically
clears.
Reset condition When auto-tuning is finished and no error occurs.
Record N/A
Cause Corrective Actions
The motor parameter is running
auto-tuning.
When the auto-tuning is finished, the warning automatically clears.
No. Display on LED Keypad Warning Name Description
28
Output phase loss
(OPHL)
Output phase loss
Action and Reset
Action condition Pr.06-47
Action time N/A
Warning treatment parameter
Pr.06-45
0: Warn and continue operation
1: Fault and ramp to stop
2: Fault and coast to stop
3: No warning
Reset method If Pr.06-45 is set to 0, the OPHL warning automatically clears after the drive stops.
Reset condition N/A
Record N/A
Cause Corrective Actions
Unbalanced three-phase
Replace the motor.
Check if the wiring is incorrect.
Check the cable.
Replace the cable.
Check if the motor is a single-
Choose a three-phase motor.
Check if the current sensor is
broken.
Check if the control board cable is loose. If yes, reconnect the cable and run
drive to test. If the error still occurs, send the drive back to the factory for repair.
Check if the three-phase current is balanced with a current clamp meter. If the
current is balanced and the OPHL error still shows on the display, send the
drive back to the factory for repair.
Check if the drive capacity is
larger than the motor capacity.
Choose the drive that matches the motor capacity.
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