Samsung Electronics 381
Piping Diagram
Snow accumulation prevention control
Channel address
▪ Purpose
Prevent snow accumulation on inactive outdoor units to ensure normal operation (default option).
▪ Concept
Snow on top of outdoor units is removed by turning on outdoor fans if snow accumulation is detected by the snow sen-
sor or via the outdoor temperature.
▪ Control specifications in detail
- If a snow sensor is not installed, the outdoor fans operate in 3step mode for one min every 30 min if operation stops at
an outdoor temperature of 5℃ or lower.
- If a snow sensor is installed and the sensor detects when operation stops at an outdoor temperature of 5℃ or lower,
the outdoor fans operate in 3 step for 10 sec and then continue operation in a higher step for 50 sec.
▪ 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
▪ Notes
- During snow accumulation, the fan may spin even when the unit is not in operation.
- Outdoor fans may be turned on by this feature during servicing. Careful attention is required.
Input unit Seg1 Seg2 Seg3 Seg4 Snow accumulation prevention control
Main 1 4
0 0 Enabled (default)
0 1 Disabled
Input unit Seg1 Seg2 Seg3 Seg4
Expand operational temperature range for
cooling operation (HR only)
Main 1 2
A U Automatic setting (default)
0 - 15
Manual setting for channel
0 - 15
7-3 Functions (cont.)
7-3-3-1 Field Setting (cont.)
7-3-3 Others (cont.)
To Next Page
Loading...
