Alarm displayed — Compressor does not start due to incorrect phase sequence

What does Incorrect phase sequence mean?

The heat pump displays an alarm, and the compressor fails to start because the electrical phase sequence is incorrect. This is particularly important for F1245-12 models equipped with scroll compressors.

• Incorrect electrical phase sequence connection to the heat pump
• Improper installation of the electrical supply

Click steps to track your progress.

1. 1

   Immediately power off the heat pump at the main circuit breaker to prevent damage.

2. 2

   Do not attempt to fix electrical connections yourself unless you are a qualified electrician.

3. 3

   Contact a qualified electrician to inspect and correct the phase sequence of the electrical connections to the unit.