Error 5301 (Pre-Startup Abnormal ACCT) – ACCT sensor fault before inverter startup

What does 5301 (Pre-Startup Abnormal ACCT) mean?

An abnormal value is detected by the ACCT sensor detection circuit immediately before the inverter starts. This suggests an issue with the sensor, its wiring, or the compressor itself.

• Inverter open output phase
• Compressor failure
• INV (Inverter) board failure

Click steps to track your progress.

1. 1

   Check the output wiring connections for the inverter to ensure they are secure and correctly installed.

2. 2

   Inspect the compressor for any earth faults or short circuits using electrical test equipment.

3. 3

   If wiring and compressor are found to be without problems, the INV board may need replacement.

4. 4

   Contact a qualified technician for further diagnosis if the issue persists.