Fan Control; Liquid Compression Protection Function 2 - Daikin D-Series Service Manual

Control Specification
3.8

Fan Control

Outline Fan control is carried out with following condition.
1. Fan ON control for electric component cooling fan
2. Fan control when defrosting
3. Fan OFF delay when stopped
4. ON/OFF control when cooling operation
5. Fan control when the number of heating rooms decreases
6. Fan control when forced operation
7. Fan control in indoor / outdoor quiet operation
8. Fan control for pressure difference upkeep
Detail Fan OFF Control when Stopped
Fan control when the number of heating room decreases (Only for Heat Pump Model)
When the outdoor air temperature is more than 10°C, the fan must be turned OFF for 30
seconds.
Tap Control in Indoor / Outdoor Unit Silent Operation
1. When Cooling Operation
2. When Heating Operation
3.9

Liquid Compression Protection Function 2

Outline In order to obtain the dependability of the compressor, the compressor must be stopped
according to the conditions of the temperature of the outdoor air and outdoor heat exchanger.
Detail Heat Pump Model
Compressor operation turns OFF under the conditions that the system is in cooling operation
and outdoor air temperature is below –5°C (52-68 class) or –10°C (80-100 class).
Cooling Only Model
Compressor operation turns OFF under the condition that outdoor air temperature is below
10°C (E series) or –10°C (D series).
106
Fan OFF delay for 60 seconds must be made when the compressor is stopped.
When the outdoor air temperature is less than 37°C, the fan tap must be set to L.
When the outdoor air temperature is more than 4°C, the fan tap must be turned to L (only for
heat pump model).
Operation stops depending on the outdoor air temperature.
Operation stops depending on the outdoor air temperature.
Si12-619A
Function and Control