Upper OPERATION INDICATOR lamp blinks 1 time (in recall mode) — Room temperature thermistor error

What does Upper lamp 1-time blink (recall) mean?

In failure mode recall function, if the upper OPERATION INDICATOR lamp blinks one time every 0.5 seconds, it indicates a short or open circuit in the room temperature thermistor. This error is detected every 8 seconds during operation.

• Room temperature thermistor short circuit
• Room temperature thermistor open circuit

Click steps to track your progress.

1. 1

   Release the failure mode recall function by cycling power to the unit or pressing the remote controller's RESET button.

2. 2

   Ensure nothing is obstructing the room temperature sensor.

3. 3

   Contact a service technician to check the room temperature thermistor and its connections.