Daikin Sky Air R-407C Service Manual page 230

Overview of the heating mode functions
1
Normal control
2
Used input
3
4
5
2–50
The optimum discharge pipe temperature is calculated based on:
Indoor and outdoor heat exchanger temperature
Actual discharge pipe temperature
Outdoor ambient temperature.
The expansion valve is controlled in order for the discharge temperature to approach the optimum
temperature.
The motor operated valve control uses the following inputs:
Input
Outdoor thermistor
Outdoor heat exchanger thermistor
Discharge pipe thermistor
Indoor heat exchanger thermistor
Connection on Connection on
indoor PCB outdoor PCB
— R1T
— R2T
— R3T
R2T —
Part 2 – Functional Description
ESIE02–01