Drive Overheat Warning

What does oH2 mean?

An external device has triggered an overheat warning signal, which was input to a multi-function input terminal (S1 through S8) configured for this purpose (H1- = B). This indicates an overheat condition originating from an external component connected to the drive. Failure to address the external overheat can lead to damage to that device or related process disruptions.

• External thermal sensor detecting overheating in an external cabinet or component.
• Faulty wiring or loose connection on the multi-function input terminal (S1-S8) configured for external overheat (H1-XX = B).
• Incorrect setting of multi-function input parameter (H1-XX) causing spurious triggering.
• Malfunctioning external thermal sensor providing an erroneous overheat signal.
• High internal temperature of the control cabinet or auxiliary equipment monitored by the sensor.

Click steps to track your progress.

1. 1

   Identify the multi-function input terminal (S1-S8) configured for H1-XX = B and trace its wiring.

2. 2

   Verify the status of the external thermal device (e.g., thermal switch) by measuring continuity or voltage at its output.

3. 3

   Measure the voltage or continuity at the drive's multi-function input terminal (S1-S8) to confirm the signal.

4. 4

   Inspect the wiring from the external thermal device to the drive's input terminal for damage or loose connections.

5. 5

   Confirm parameter H1-XX (Multi-Function Input) is correctly set to 'B' (External Overheat) for the relevant terminal.

6. 6

   Check the temperature of the external equipment or cabinet monitored by the sensor using an infrared thermometer.