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

SiEBE04-507
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.
Function and Control
13°C
Reset zone
7°C
Up zone
5°C
Keep zone
3°C
Drooping zone
0°C
Stop zone
56°C
53°C
51°C
Heat exchanger
thermistor
temperature
Heat exchanger
thermistor temperature
Stop zone 65°C
Drooping zone
Keep zone
Up zone
Reset zone 46°C
Control Specification
Return from stop
(R4561)
(R4589)
43