Charging pump stops — Due to sensor fault on BT1

What does Charging pump stops mean?

The charging pump would unexpectedly cease operation if a sensor fault was detected on BT1. This could disrupt the heating or cooling process and prevent the system from functioning correctly.

• Faulty BT1 sensor or a loose connection to it.
• Incorrect system response to a BT1 sensor fault (software issue).
• Power interruption to the charging pump.

Click steps to track your progress.

1. 1

   Inspect the BT1 sensor for physical damage and ensure it is securely connected to the control module.

2. 2

   If the sensor appears faulty, arrange for its replacement by a qualified technician.

3. 3

   Verify the charging pump has power and its circuit breaker is not tripped.

4. 4

   Update the NIBE SMO 20 firmware to version 8700R2 or later to correct this behavior.