Daikin RXS35K2V1B, Service Manual

Page: 52 / 130

Control Specification SiBE041213E
41 Function and Control
3.6 Freeze-up Protection Control
Outline During cooling operation, the signal sent from the indoor unit controls the operating frequency
limitation and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is
divided into zones.)
Detail The operating frequency limitation is judged with the indoor heat exchanger temperature.
3.7 Heating Peak-cut Control
Outline During heating operation, the indoor heat exchanger temperature determines the frequency
upper limit to prevent abnormal high pressure.
Detail
A (°C) B (°C) C (°C)
9.5 7.5 5.5
(R14718)
Reset zone
Indoor heat exchanger
thermistor temperature
Up zone
Keep zone
Dropping zone
Stop zone
0˚C
C ˚C
B ˚C
A ˚C
13˚C
Zone Control
Stop zone When the temperature reaches the 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 canceled.
35 class 42 class 50 class
A (°C) 65 65 65
B (°C) 56 55 56
C (°C) 53 54 55
D (°C) 51 52 53
E (°C) 46 50 51
Indoor heat exchanger
thermistor temperature
Stop zone
Dropping zone
Keep zone
Up zone
Reset zone
(R14645)
D ˚C
C ˚C
B ˚C
A ˚C
E ˚C