Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin J Series 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
34
(Reference)
13˚C
Reset zone
9˚C
Up zone
7˚C
Keep zone
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.
(°C) 65
(°C) 56
(°C) 53
(°C) 51
(°C) 46
Indoor heat exchanger
thermistor temperature
Stop zone
Drooping zone
Keep zone
Up zone
Reset zone
Control
SiBE041012
(R11818)
˚C
˚C
(R11819)
Function and Control