Control Specification DAMA-SM-21-001
42 Functions and Control
3.8 Heating Peak-cut Control
Outline Heat Pump Only
During heating operation, the signals being sent from the indoor unit allow the operating
frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must
be divided as follows.)
Details Conditions for Start Controlling
Judge the controlling start with the indoor heat exchanger temperature after 2 sec. from
operation start.
Control in Each Zone
The heat exchange intermediate temperature of indoor unit controls the following.
Frequency control in each zone
Zone Control
Stop zone
When indoor coil temperature stop zone, the compressor stops
Dropping zone
The upper limit of frequency decreases
Keep zone
The upper limit of frequency is kept
Up zone
The upper limit of frequency increases
Reset zone
The upper limit of frequency is cancelled
09 12 18 24
A (°C) 59.0 59.0 65.0 65.0
B (°C) 55.0 55.0 56.0 56.0
C (°C) 52.0 52.0 55.0 55.0
D (°C) 50.0 50.0 53.0 53.0
E (°C) 45.0 45.0 51.0 51.0
09 12 18 24
A (°F) 138.2 138.2 149.0 149.0
B (°F) 131.0 131.0 132.8 132.8
C (°F) 125.6 125.6 131.0 131.0
D (°F) 122.0 122.0 127.4 127.4
E (°F) 113.0 113.0 123.8 123.8
E°C (°F)
A°C (°F)
B°C (°F)
C°C (°F)
D°C (°F)
Heat exchanger
thermistor
temperature
Stop zone
Dropping zone
Keep zone
Up zone
Reset zone
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