Overview of the heating mode functions ESIE02–01
2–40 Part 2 – Functional Description
3
1
2
4
5
Starting and ending
conditions:
RY35-45E(A)Z7V1
Starting conditions
The defrosting starts when all of the following conditions are fulfilled:
■ The compressor has been running over 40 min
■ If Ta ≥ 5˚C, outdoor heat exchanger temperature < -3˚C
■ Outdoor heat exchanger temperature < (Ta x 0,4) - 5˚C.
Ending conditions
The defrosting stops when one of the following conditions is fulfilled:
■ Defrosting has been running over 10 min, or
■ Outdoor heat exchanger temperature > 12.5˚C, or
■ High-pressure switch has been activated, or
■ Indoor unit has been switched OFF, or
■ Unit is in another mode than heating.
Hot start after
defrosting
The hot start function is activated:
■ 40 s after the defrosting ending, or
■ When Tc > 34˚C (indoor heat exchanger temperature).
Used input The defrost 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
Defrosting start temperature changeover switch — DS1-2
Defrosting forced time changeover switch — DS2-1
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