Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin ATXS35EV1B7 Service Manual

Control Specification
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.
Control in Each Zone
The heat exchange intermediate temperature of indoor unit controls the following.
38
13˚C
Reset zone
7˚C
Up zone
5˚C
Keep zone
3˚C
Drooping zone
0˚C
Stop zone
25/35 class
50 class
Heat exchanger
thermistor temperature
SiBE04-824
Return from stop
(R4561)
Function and Control