Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin FTXS35K2V1B 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
41
13˚C
Reset zone
A˚C
Up zone
B˚C
Keep zone
C˚C
Dropping zone
0˚C
Stop zone
A (°C) B (°C)
9.5 7.5
B˚C
C˚C
D˚C
Indoor heat exchanger
thermistor temperature
Zone
Stop zone
Dropping zone
Keep zone
Up zone
Reset zone
35 class
A (°C) 65
B (°C) 56
C (°C) 53
D (°C) 51
E (°C) 46
Indoor heat exchanger
thermistor temperature
C (°C)
5.5
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.
42 class 50 class
65 65
55 56
54 55
52 53
50 51
SiBE041213E
(R14718)
Stop zone
A˚C
Dropping zone
Keep zone
Up zone
E˚C
Reset zone
(R14645)
Control
Function and Control