Miniature circuit-breaker (FA1) tripped — Internal circuit breaker activated

What does Miniature circuit-breaker tripped mean?

The internal miniature circuit breaker (FA1) has tripped, cutting power to the heat pump's operating circuit or a large proportion of its internal components. This can occur due to electrical issues or even during transportation.

• Electrical overload or short circuit
• Fault in an internal component
• Impact or vibration during transportation (check after delivery)
• Incorrect wiring or connection

Click steps to track your progress.

1. 1

   Power off the heat pump at the main circuit breaker.

2. 2

   Carefully open the front cover to locate the miniature circuit-breaker (FA1).

3. 3

   Reset the breaker by flipping its switch back to the 'ON' position.

4. 4

   Power on the heat pump and monitor its operation. If it trips again, contact NIBE service.