Samsung ACH1800E Technical Manual page 54

4. Specification of Control Module
4-1. Specification of Control
4-1-1. Operation pattern
4-1-2. Operation specification
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Anti-freezing control according to the outdoor temperature
– Outdoor temperature ≥ 22°C : Outdoor fan high
– Outdoor temperature ≤ 20°C : Outdoor fan low
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Anti-freezing control according to outdoor heat exchanger temperature
– Outdoor fan is controlled by detecting the outdoor heat exchanger during the control of outdoor fan according to the outdoor
temperature.
– Outdoor heat exchanger temperature ≤ T1°C : lower 1 step of outdoor fan.(Strong → Weak, Weak → OFF)
– Outdoor heat exchanger temperature ≥ 50°C : Release the outdoor fan control by the outdoor heat exchanger
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Anti-freezing control according to the indoor heat exchanger temperature
– Outdoor fan/COMPor is controlled by detecting the indoor heat exchanger during the outdoor fan control based on the outdoor
temperature.
– Indoor heat exchanger temperature ≤ 0°C for 20 seconds: Outdoor FAN OFF(the first anti-freezing control)
– Indoor heat exchanger temperature ≤ -4°C for 20 seconds : Outdoor fan OFF, COMPor OFF(the second anti-freezing control)
– Release of anti-freezing control by the indoor heat exchanger
– → 1st anti-freezing control release : Indoor heat exchanger temperature≥ 4°C
– → 2nd anti-freezing control release : Indoor heat exchanger temperature ≥ 6°C
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To operate based on the first detected one among the indoor heat exchanger temperature and outdoor heat exchanger temperature
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T1 Temperature specification : 35°C +(20°C – outdoor temperature)/2
T1 Temperature specification : (48°C≥T1≥35°C)
SPECIFICATION OF CONTROL MODULE
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