Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin FTXS20G2V1B Service Manual

Control Specification
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
53
(Reference)
13°C
Reset zone
9.5°C
Up zone
7.5°C
Keep zone
5.5°C
Drooping zone
0°C
Stop zone
°C
°C
°C
Indoor heat exchanger
thermistor temperature
Zone
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.
20/25/35 class
(°C) 65
(°C) 56
(°C) 53
(°C) 51
(°C) 46
Indoor heat exchanger
thermistor temperature
42 class 50 class
65 65
55 56
54 55
52 53
50 51
SiENBE04-808_A
Stop zone
°C
Drooping zone
Keep zone
Up zone
°C
Reset zone
(R11819)
Control
Function and Control
(R4561)