Samsung AM072BXV Series Service Manual page 288

Piping Diagram
7-3 Functions (cont.)
7-3-3 Others (cont.)
7-3-3-1 Field Setting (cont.)
Snow accumulation prevention control
▪ 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 sensor 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.
Input unit Seg1
Main 1
▪ 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.
Speed operation
▪ Purpose
-Enabling this setting will command the air conditioner to cool/heat faster at initial start-up.
▪ Concept
-The cooling or heating speed is increased by raising the compressor frequency increase speed.
▪ Control specifications in detail
- The frequency and increase speed are increased in Safety Start mode.
- The control speed is improved by changing the interval to control the target heating pressure to 20 sec from 40 sec.
Input unit Seg1
Main 1
▪ Notes
- This function will not work when High-head condition setting or Long-piping condition setting is enabled.
Max capacity restriction
▪ Purpose
Prevent an excessive increase of compressor performance compared to the capacity of indoor units (default option).
▪ Concept
The maximum capacity for outdoor units is restricted taking into account the capacity of indoor units and the outdoor tem-
perature.
▪ Control specifications in detail
- The maximum operation capacity is restricted, taking into account the capacity of indoor units, set fan speed,
outdoor temperature, and indoor temperature if the system cooling operation status is within the normal operation range.
- The maximum cooling capacity is not restricted if the outdoor temperature is low and it is difficult to secure low and
high pressures.
Input unit Seg1
Main 1
Samsung Electronics
Seg2 Seg3
0
4
0
Seg2 Seg3
0
7
0
Seg2 Seg3
0
8
0
Seg4 Snow accumulation prevention control
0 Enabled (default)
1
Seg4 Speed operation
0 Disabled (default)
1
Seg4 Max capacity restriction
0 Enabled (default)
1
Disabled
Enabled
Disabled
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