Samsung AM080FX A Series Service Manual page 361

Piping Diagram
7-3 Functions (cont.)
7-3-3 Others (cont.)
7-3-3-1 Field Setting (cont.)
Expand operational temperature range for cooling
▪ Purpose
Extend the low temperature operation range for HR units to -15℃ .
▪ Concept
- The cooling operation range is extended by controlling purpose-specific valves on HR units.
- HR Only
▪ Control specifications in detail
- If it is difficult to secure outdoor high pressure while in cooling mode in an outdoor location with a low temperature,
formation of high pressure is facilitated by controlling the low pressure decrease, Solenoid valve
- Main EEV, and Solenoid valve
- Hot gas bypass.
Input unit Seg1
Main 1
▪ Notes
- Continuous cooling operation is possible even in low temperature condition up to -15℃ ,
but noise of the MCU will increase.
- This option is only for HR unit.
Channel address
▪ Purpose
Identify multiple main outdoor units connected to upper-level controllers, such as DMS and S-NET3.
▪ Concept
- If the Channel address is set, the same channel address is assigned to the sub outdoor units, indoor units,
and MCUs connected to a main outdoor unit.
▪ Control specifications in detail
Input unit Seg1
Main 1
Samsung Electronics
Seg2 Seg3
0
2
0
Seg2 Seg3
A
3
0~15
Expand operational temperature range for
Seg4
cooling operation (HR only)
0
1
Seg4
Automatic setting (default)
U
Manual setting for channel
Disabled (default)
Enabled
Channel address
0 - 15
380