What does 266 mean?

Insufficient refrigerant was detected at start-up during cooling operation. The refrigerant level needs to be checked.

• Service valve closed
• Loose connection sensor (BT15, BT3)
• Defective sensor (BT15, BT3)
• Insufficient amount of refrigerant

Click steps to track your progress.

1. 1

   Ensure service valves are open.

2. 2

   Check sensor connections (BT15, BT3).

3. 3

   Inspect sensors (BT15, BT3) for defects.

4. 4

   Verify the refrigerant charge level.

5. 5

   Contact a technician if refrigerant is low.