Code

Name

Causes

Possible Solutions

oH

Heatsink Overheat

The ambient temperature is high and the heatsink temperature is more than the L8-02 [Overheat Alarm Level].

  • Measure the ambient temperature.

  • Increase the airflow around the drive.

  • Install a cooling device (cooling fan or air conditioner) to lower the ambient temperature.

  • Remove objects near the drive that are producing too much heat.

There is not sufficient airflow around the drive.

  • Give the drive the correct installation space as shown in the manual.

  • Make sure that there is sufficient circulation around the control panel.

  • Examine the drive for dust or other unwanted materials that could clog the cooling fan.

  • Remove unwanted materials that prevent air circulation.

The internal cooling fan or fans have stopped.

  1. Use the procedures in this manual to replace the cooling fan.

  2. Set o4-03 = 0 [Fan Operation Time Setting = 0 h] to reset the cooling fan operation time.
Note:

  • The drive detects this error if the heatsink temperature of the drive is more than L8-02.

  • If the drive detects this error, the terminal assigned to H2-01 to H2-04 = 10 [MFDO Function Select = Alarm] will be ON.

  • Set the stopping method for this fault in L8-03 [Overheat Pre-Alarm Selection].