SE-i1

Q: Why has the SE-i1 switched off or why is the relay opened?

Q: Why can't I communicate with the unit?




Q: Why has the SE-i1 switched off or why is the relay opened?

- Check if the there is power to the unit according to specification.

- Turn off the power for 5 seconds and see if the relay is energized after power on again.

If not energized: Turn off all the power to avoid risk of injury!

- Un-mount one of the cables to the PTC element in the motor.

- If the measured resistance is above 11.4 kOhm ±20%, the temperature of the PTC-sensor is above the threshold limit and the relay has been released to protect the motor or installation.

- If the measured resistance is more than 1 MΩ there is a broken connection to the PTC-sensor and the relay will not be engaged.

- If the measured resistance is close to 0 Ω there is a short circuit on the PTC-sensor cables and there is no overheat protection!

- If all three phases are within range and resistance is below 2.9 kOhm ±20%, the protection module may be defect and needs replacement.

- Envelope Via the serial communication the actual zone where the warning or alarm is raised can be read via the BEST service tool.

- Verify using BEST service tool that SE-i1 is configured for the correct compressor and application.



Q: Why can't I communicate with the unit?

- Check the communication cables for correct wiring.

- Check if the communication address setting matches the selected. Note: Address 0 is not allowed! Default address is 48.

- Check if the communication speed matches the selected. Use BEST to read the settings.

- Check if communication is active. There is one LED for communication activity, please see next section.

- Please observe that all registers in the parameters are index based, meaning they start with no. 1 and not with zero.

For further information please see the user manual.