OPERATION INDICATOR lamp blinks 2 times (Pattern A) - Open/short of outdoor unit thermistors

What does 2 mean?

The OPERATION INDICATOR lamp blinks twice in 'Output pattern A' from the indoor unit, suggesting that there is an open circuit or short circuit in the outdoor unit's thermistors.

• Open circuit in outdoor unit thermistors.
• Short circuit in outdoor unit thermistors.

Click steps to track your progress.

1. 1

   Check if connectors (TH3, TH32, TH33, TH4, and TH7/6) on the outdoor controller board and connector (CN3) on the outdoor power board are not disconnected.

2. 2

   Measure the resistance value of the outdoor thermistors using a tester to check for open or short circuits.

3. 3

   Ensure all wiring connections to the thermistors are secure and undamaged.