Alarm 494 (or 298, 92) Heating not working — Inverter failed to heat the compressor

What does Heating not working 494 mean?

This alarm means the inverter tried to heat up the compressor but failed, possibly due to a fault in the inverter or a loose discharge sensor.

• Fault in the inverter.
• Discharge sensor (BT14) has come loose from its mount.

Click steps to track your progress.

1. 1

   Check the indoor module/control module display for specific action instructions.

2. 2

   Visually inspect the discharge sensor (BT14) on the compressor to ensure it is securely mounted.

3. 3

   If the sensor appears connected and secure, contact a qualified technician for further diagnosis of the inverter or sensor.