Daikin Sky Air R-407C - Page 186

General Functionality ESIE02–01
2–6 Part 2 – Functional Description
3
1
2
4
5
3 Outdoor
heat
exchanger
R2T Cooling ■ Optimise discharge temp. (cond. temp.)
■ Integral capacity calculation (to determine
freeze-up)
Heat-
ing
■ Optimise discharge temp. (evap. temp.)
■ Defrost start/stop
4 Outdoor
air return
R1T Cooling
■ Outdoor fan speed control
■ Start-up control expansion valve and outdoor
unit fan
■ Integral capacity calculation (to determine
freeze-up)
Heat-
ing
■ Integral capacity calculation (to determine
defrost)
■ Start-up control expansion valve and outdoor
unit fan
5Discharge
pipe com-
pressor
R3T Cooling
■ Cooling overload
■ Check refrigerant shortage/too much refrigerant
■ Expansion valve control
Heat-
ing
■ Heating overload
■ Check refrigerant shortage/too much refrigerant
■ Expansion valve control
Ther-
mistor
Location
Wiring
symbol
Mode Function