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

SiBE061121.book Page 38 Monday, April 25, 2011 3:20 PM
Control Specification
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 60 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 while
cooling with low outdoor temperature.
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5. Fan control while forced cooling operation
The outdoor fan is controlled as well as normal operation while the forced cooling operation.
6. Fan speed control for POWERFUL operation
The rotation speed of the outdoor fan is increased while the POWERFUL operation.
7. Fan speed control while indoor / outdoor unit quiet operation
The rotation speed of the outdoor fan is reduced by the command of the indoor / outdoor unit
quiet operation.
8. 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
In cooling operation, when the outdoor temperature is below a certain level, the compressor
turns off.
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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.
Operation stops depending on the outdoor temperature
SiBE061121
Function and Control