Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin FTXS20K2V1B Service Manual

Control Specification
3.6

Freeze-up Protection Control

During cooling operation, the signal sent from the indoor unit determines the frequency upper
limit and prevents freezing of the indoor heat exchanger. (The signal from the indoor unit is
divided into zones.)
The operating frequency limitation is judged with the indoor heat exchanger temperature.
3.7

Heating Peak-cut Control

During heating operation, the indoor heat exchanger temperature determines the frequency
upper limit to prevent abnormal high pressure.
The operating frequency limitation is judged with the indoor heat exchanger temperature.
44
13˚C
Reset zone
A˚C
Up zone
B˚C
Keep zone
C˚C
Dropping zone
0˚C
Stop zone
A (°C) B (°C)
11 9
B˚C
C˚C
D˚C
Indoor heat exchanger
thermistor temperature
RXS20/25K2V1B
RXS20/25K3V1B
RXS20/25L2V1B
ARXS25L2V1B
A (ºC) 65
B (ºC) 56
C (ºC) 53
D (ºC) 51
E (ºC) 46
Zone
Stop zone
Dropping zone
Keep zone
Up zone
Reset zone
Indoor heat exchanger
thermistor temperature
C (°C)
7
RXS20/25L3V1B
ARXS25L3V1B
63
56
53
51
46
When the temperature reaches the stop zone, the compressor stops.
The upper limit of frequency decreases.
The upper limit of frequency is kept.
The upper limit of frequency increases.
The upper limit of frequency is canceled.
SiBE041134EB
(R22433)
Stop zone
A˚C
Dropping zone
Keep zone
Up zone
E˚C
Reset zone
(R22434)
Control
Functions and Control