Error Code 40 — Indoor unit E gas pipe temperature sensor malfunction

What does 40 mean?

There is an electrical failure with the gas pipe temperature sensor for indoor unit E. This sensor is part of the EEV circuit and connects to the PCB.

• Defective gas pipe temperature sensor for indoor unit E
• Loose or damaged sensor wiring
• Open or shorted sensor circuit

Click steps to track your progress.

1. 1

   Check the sensor wiring connection to the PCB.

2. 2

   Inspect the sensor wiring for 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.