Service manual

ESIE03–01 General Functionality
Part 2 – Functional Description 2–25
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Normal control The optimum discharge pipe temperature is calculated based on:
P Indoor and outdoor heat exchanger temperature
P Actual discharge pipe temperature
P Outdoor ambient temperature.
The expansion valve is controlled in order for the discharge temperature to approach the optimum
temperature.
Used input The motor operated valve control uses the following inputs:
Input
Connection on
indoor PCB
Connection on
outdoor PCB
Outdoor thermistor — R1T
Outdoor heat exchanger thermistor — R2T
Discharge pipe thermistor — R3T
Indoor heat exchanger thermistor R2T —