Code

Name

Causes

Possible Solutions

oH

Heatsink Overheat

The ambient temperature is high and the heatsink temperature of the drive is more than the value set in L8-02 [Overheat Alarm Level].

  • Measure the ambient temperature.

  • Increase the airflow in the control panel.

  • 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.

The load is too heavy.

  • Measure the output current.

  • Decrease the load.

  • Decrease the value set in C6-02 [Carrier Frequency Selection].

The internal cooling fan of the drive stopped.

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

  2. Set o4-03 = 0 [Fan Operation Time Setting = 0 h].
Note:

  • The drive detects this fault if the heatsink temperature of the drive is more than the value set in L8-02.

  • Do a Fault Reset to clear the fault.

  • If the drive detects this fault, it will operate the motor as specified by the Stopping Method set in L8-03 [Overheat Pre-Alarm Selection].