What does U2 mean?

This code indicates that the system has detected either a voltage drop or an overvoltage. This can temporarily stop operation to protect the unit.

• Power supply voltage is too low
• Power supply voltage is too high
• Unstable power grid

Click steps to track your progress.

1. 1

   Check that the main power supply voltage is within the expected range for the unit.

2. 2

   Ensure the circuit breaker is not tripped and is functioning correctly.

3. 3

   If voltage issues persist, consult an electrician to check your home's power supply.