Outdoor Fan Control; Liquid Compression Protection Function - Daikin FTX20K(2)V1B Service Manual

SiBE041525F
3.8

Outdoor Fan Control

1. Fan ON control to cool down the electrical box
The outdoor fan is turned ON when the electrical box temperature is high while the compressor
is OFF.
2. Fan OFF control during defrosting
The outdoor fan is turned OFF during defrosting.
3. Fan OFF delay when stopped
The outdoor fan is turned OFF 60-70 seconds after the compressor stops.
4. Fan speed control for pressure difference upkeep
The rotation speed of the outdoor fan is controlled for keeping the pressure difference during
cooling operation with low outdoor temperature.
 When the pressure difference is low, the rotation speed of the outdoor fan is reduced.
 When the pressure difference is high, the rotation speed of the outdoor fan is controlled as
5. Fan speed control during forced cooling operation
The outdoor fan is controlled as well as normal operation during forced cooling operation.
6. Fan speed control during POWERFUL operation
The rotation speed of the outdoor fan is increased during POWERFUL operation.
7. Fan speed control during indoor unit quiet operation
The rotation speed of the outdoor fan is reduced by the command of the indoor unit quiet
operation.
8. Fan ON/OFF control when operation (cooling, heating, dry) starts / stops
The outdoor fan is turned ON when the operation starts. The outdoor fan is turned OFF when
the operation stops.
3.9

Liquid Compression Protection Function

In order to increase the dependability of the compressor, the compressor is stopped according
Outline
to the outdoor temperature.
Operation stops depending on the outdoor temperature.
Detail
Compressor turns off under the conditions that the system is in cooling operation and outdoor
temperature is below –12-0°C (depending on the model).
Functions and Control
well as normal operation.
Control Specification
34