Fan Control; Liquid Compression Protection Function 2 - Daikin CTXU25G2V1B Service Manual

SiBE12-908
3.9

Fan Control

Outline Fan control is carried out according to the following conditions.
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 unit quiet operation
8. Fan control during heating operation
9. Fan control in the POWERFUL mode
10.Fan control for pressure difference upkeep
Detail Fan OFF Control when Stopped
Tap Control in Indoor / Outdoor Unit Quiet Operation
1. When Cooling Operation
2. When Heating Operation
3.10

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
Compressor operation turns OFF under the conditions that the system is in cooling operation
and outdoor air temperature is below 10°C.
Function and Control
Fan OFF delay for 60 seconds must be made when the compressor is stopped.
When the outdoor air temperature is higher than 37°C, the fan tap must be set to H.
When the outdoor air temperature is 18 ~ 37°C, the fan tap must be set to M.
When the outdoor air temperature is lower than 18°C, the fan tap must be set to L.
When the outdoor air temperature is lower than 4°C, the fan tap must be set to H.
When the outdoor air temperature is 4 ~ 12°C, the fan tap must be set to M.
When the outdoor air temperature is higher than 12°C, the fan tap must be set to L.
Operation stops depending on the outdoor air temperature.
Control Specification
35