Outdoor Fan Control - Daikin CTX Series Service Manual

Control Specification
3.8

Outdoor Fan Control

1. Fan ON control to cool down the electrical box
2. Fan OFF delay when stopped
3. Fan speed control for pressure difference upkeep
4. Fan speed control during forced cooling operation
5. Fan speed control during indoor unit quiet operation
6. Fan ON/OFF control when operation (cooling, dry) starts/stops
7. Fan control when defrosting
8. Fan control when the compressor starts for heating
40
The outdoor fan is turned ON when the electrical box temperature is high while the
compressor is OFF.
The outdoor fan is turned OFF 60 seconds after the compressor stops.
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 well as normal operation.
The outdoor fan is controlled as well as normal operation during forced cooling operation.
The rotation speed of the outdoor fan is reduced by the command of the indoor unit quiet
operation.
The outdoor fan is turned ON when the operation starts. The outdoor fan is turned OFF
when the operation stops.
DAMA-SM-21-003
Functions and Control