Error Code 39 — Condensing temperature sensor malfunction

What does 39 mean?

There is an electrical failure with the sensor that measures the condensing temperature of the outdoor coil. This sensor is connected to the PCB.

• Defective condensing temperature sensor
• Loose or damaged sensor wiring
• Open or shorted sensor circuit

Click steps to track your progress.

1. 1

   Check that the sensor wiring is firmly and correctly connected to the PCB via two wires at Plug CN-14.

2. 2

   Inspect the sensor wiring for any damage.

3. 3

   Test the sensor's resistance against the values in the manual's reference section.

4. 4

   Replace the sensor if it is found to be faulty.