Alarm 165 — Low pressure climate system

What does 165 mean?

This alarm indicates low pressure in the climate system. It activates via an AUX-input and will show as a red light on the control module. It does not trigger control actions but can send notifications.

• Low pressure detected in the climate system.
• Faulty pressure switch or wiring to the AUX-input.

Click steps to track your progress.

1. 1

   Check the NIBE SMO 20 control module for a red light indicating alarm 165.

2. 2

   Verify the pressure in the climate system. If low, consult an HVAC technician to repressurize the system.

3. 3

   Inspect the AUX-input connection for the pressure switch on the control module.