Hydraulic Indoor Unit LED2 (Green) 7 Flashes, LED1 (Red) 1 Flash - Discharge thermistor error

What does LED2 7 Flashes, LED1 1 Flash mean?

This indicates a problem with the discharge thermistor, a temperature sensor crucial for monitoring the compressor's discharge temperature. The outdoor unit may also show '2 Flashes' for this error after pressing the ENTER switch.

• Faulty discharge thermistor sensor.
• Loose or damaged wiring to the thermistor.
• Overheating condition at the compressor discharge.

Click steps to track your progress.

1. 1

   Turn off the main power supply to the heat pump for 30 seconds, then turn it back on.

2. 2

   If the outdoor unit ERROR LED is blinking, press the ENTER switch to confirm the specific '2 Flashes' error code.

3. 3

   If the error persists, use the 'Reset HP' function (Line 6711) in the control system.

4. 4

   Contact a qualified service technician to check or replace the thermistor.