Samsung AM080FX A Series Service Manual page 341

Piping Diagram
7-3 Functions (cont.)
7-3-2 Control (cont.)
7-3-2-6 Indoor unit control (cont.)
Auto Change Over
▪ Purpose
Automatically turn on heating or cooling mode according to the indoor temperature when using auto mode on HR model
units.
▪ Concept
- How to turn on the mode : Select Auto Changeover
- Heating or cooling mode automatically turns on after comparing the indoor temperature (Tr) with the set temperature
(Ts). It is possible to adjust the Auto Changeover condition according to the value of installation option 2.
▪ Control specifications in detail
1. Initial operation mode determination
If Tr ≥ Ts - A + 1 K
Auto Cooling
2. Mode change
Cooling → Heating
Thermo off for T & Tr < Ts - D
3. Thermo On/Off
In cooling mode
Thermo on : Tr ≥ Ts + B + 1 K
Thermo off : Tr < Ts + B – 1 K
- Install Option 2 value
Symbol
A Offset the set heating temp
B Offset the set cooling temp
C Change the mode (heat → cool)
D Change the mode (cool → heat)
T
Samsung Electronics
Function
T time
If Tr < Ts – A + 1 K
Auto Heating
Heating → Cooling
Thermo off for T & Tr ≥ Ts + C
In heating mode
Thermo on : Tr < Ts - A – 1 K
Thermo off : Tr ≥ Ts - A + 1 K
0 1 2 3
0 0.5 1 1.5
0 0.5 1 1.5
1 1.5 2 2.5
1 1.5 2 2.5
5 7 9 11
4 5 6 7
2 2.5 3 3.5
2 2.5 3 3.5
3 3.5 4 4.5
3 3.5 4 4.5
13 15 20 30
360