Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin FLXS-BAVMB 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
43
(Reference)
11˚C
Reset zone
9˚C
Up zone
7˚C
Keep zone
5˚C
Drooping zone
0˚C
Stop zone
B˚C
C˚C
D˚C
Indoor heat exchanger
thermistor temperature
Zone
Stop zone
Drooping zone
Keep zone
Up zone
Reset zone
A (°C) 65
B (°C) 56
C (°C) 53
D (°C) 51
E (°C) 46
Heat exchanger
thermistor temperature
When the temperature reaches the stop zone, the compressor stops.
The timer starts, and the frequency is drooping.
The upper limit of frequency is kept.
The upper limit of frequency is increased.
The upper limit of frequency is canceled.
SiBE05-722_B
(R11261)
Stop zone
A˚C
Drooping zone
Keep zone
Up zone
E˚C
Reset zone
(R13532)
Control
Function and Control