Daikin FTKS20D2VMWL, Service Manual

Page: 76 / 228

SiENBE04-507A Control Specification
Function and Control 67
3.6 Freeze-up Protection Control
Outline
During cooling operation, the signals being sent from the indoor unit allow the operating
frequency limitation and then prevent freezing of the indoor heat exchanger. (The signal from
the indoor unit must be divided into the zones as the followings.
Detail Conditions for Start Controlling
Judge the controlling start with the indoor heat exchanger temperature after 2 sec from
operation start.
Control in Each Zone
3.7 Heating Peak-cut Control
Outline Heat Pump Only
During heating operation, the signals being sent from the indoor unit allow the operating
frequency limitation and prevent abnormal high pressure. (The signal from the indoor unit must
be divided as follows.)
Detail
Conditions for Start Controlling
Judge the controlling start with the indoor heat exchanger temperature after 2 sec. from
operation start.
Control in Each Zone
The heat exchange intermediate temperature of indoor unit controls the following.
(R4561)
Return from stop
Reset zone
Heat exchanger
thermistor temperature
Up zone
Keep zone
Drooping zone
Stop zone
0°C
3°C
5°C
7°C
13°C
Stop zone 65°C
Drooping zone
Keep zone
Up zone
Reset zone 46°C
56°C
53°C
51°C
Heat exchanger
thermistor
temperature