Error E56 / Outdoor Red LED Flashes Once — Power transistor thermistor faulty or disconnected

What does E56 / Outdoor Red LED 1 flash mean?

Error E56, indicated by one flash of the outdoor unit's red LED, means the power transistor thermistor is either faulty or disconnected (specifically for FDCVA151-251 models). This sensor monitors power transistor temperature.

• Power transistor thermistor faulty or disconnected (FDCVA151-251)

Click steps to track your progress.

1. 1

   Turn off the main power supply to the outdoor unit.

2. 2

   If you have an FDCVA151-251 model, contact a professional technician.

3. 3

   This sensor is an internal component and generally requires specialized tools and knowledge to inspect or replace.

4. 4

   Do not attempt to access or repair internal components without proper training.

5. 5

   Schedule a service appointment with a certified technician.