Freeze-Up Protection Control; Heating Peak-Cut Control - Daikin G-Series 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 seconds from
operation start and after 30 seconds from changing number of operation room.
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 minutes from
operation start and A seconds from changing number of operation room.
Control in Each Zone
The maximum value of heat exchange intermediate temperature of each indoor unit controls the
following (excluding stopped rooms).
86
13°C
Reset zone
7°C
Up zone
5°C
Keep zone
3°C
Drooping zone
0°C
Stop zone
A
When increase 30
When decrease 2
Heat exchanger
thermistor temperature
Heat exchanger
thermistor
temperature
SiBE12-933_A
(R14043)
Stop zone
Drooping zone
Keep zone
Up zone
Reset zone
Function and Control