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SiENBE04-925_A
Control Specification
Function and Control
41
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
(R4561)
Reset zone
Indoor heat exchanger
thermistor temperature
Up zone
Keep zone
Drooping zone
Stop zone
0°C
5.5°C
7.5°C
9.5°C
13°C
(Reference)
Zone
Control
Stop zone
When the temperature reaches the stop zone, the compressor stops.
Drooping zone
The timer starts, and the frequency is drooping.
Keep zone
The upper limit of frequency is kept.
Up zone
The upper limit of frequency is increased.
Reset zone
The upper limit of frequency is canceled.
20 class
25 class
35 class
(°C)
65
65
65
(°C)
56
55
56
(°C)
53
54
55
(°C)
51
52
53
(°C)
46
50
51
Indoor heat exchanger
thermistor temperature
Stop zone
Drooping zone
Keep zone
Up zone
Reset zone
(R11819)
°C
°C
°C
°C
°C
SIENBE04-925_A_FRONT.pdf 55
24/02/2011 13:53:52
Summary of Contents for Inverter FTXL20G2V1B
Page 8: ...SiENBE04 925_A vi Table of Contents...
Page 14: ...Introduction SiENBE04 925_A xii...
Page 15: ...SiENBE04 925_A List of Functions 1 Part 1 List of Functions 1 Functions 2...
Page 17: ...SiENBE04 925_A Specifications 3 Part 2 Specifications 1 Specifications 4...
Page 20: ...Specifications SiENBE04 925_A 6 Specifications...