Outdoor Fan Control; Liquid Compression Protection Function - Daikin FTXN25KEV1B Service Manual

SiBE041102_A
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 while defrosting
The outdoor fan is turned OFF while defrosting.
3. Fan OFF delay when stopped
The outdoor fan is turned OFF 70 seconds after the compressor stops.
4. Fan ON/OFF control for pressure difference upkeep
The outdoor fan is controlled for keeping the pressure difference while cooling with low outdoor
temperature.
5. Fan control while forced cooling operation
The outdoor fan is controlled as well as normal operation while the forced cooling operation.
6. Fan ON/OFF control when operation 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

Outline In order to obtain the dependability of the compressor, the compressor is stopped according to
the outdoor temperature and temperature of the outdoor heat exchanger.
Detail
Compressor turns off under the conditions that the system is in cooling operation and outdoor
temperature is below 0°C.
Function and Control
When the pressure difference is low, the outdoor fan stops.
When the pressure difference is high, the outdoor fan rotates.
Operation stops depending on the outdoor temperature
Control Specification
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