Fan Control; Low Hz High Pressure Limit; Liquid Compression Protection Function 2 - Daikin FTXS09HVJU Service Manual

SiUS04-904
4.8

Fan Control

Fan control is carried out according to the following conditions.
Outline
1. Fan ON control for electric component cooling fan
2. Fan control when defrosting
3. Fan OFF delay when stopped
4. ON/OFF control in cooling operation
5. Tap control when
6. Fan control in forced operation
7. Fan control in indoor/outdoor unit quiet operation
8. Fan control in POWERFUL mode
9. Fan control in normal operation
Detail
Fan OFF Control when Stopped
 Fan OFF delay for 60 seconds must be made when the compressor is stopped.
Tap Control in indoor/outdoor unit quiet operation
1. When Cooling Operation
2. When Heating Operation
4.9

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.
 Operation stop depending on the outdoor air temperature:
Detail
Compressor operation turns OFF under the conditions that the system is in cooling operation and
outdoor air temperature is below 14°F (-10 C).
Operation can be extended to 0°F (17-18°C) (RXS-DVJU) with the addition of a wind

4.10 Low Hz High Pressure Limit

Set the upper limit of high pressure in a low Hz zone. Set the upper limit of the indoor heat
Outline
exchanger temperature by its operating frequency of Hz. Separate into three zones, reset zone,
unchanged zone and
Detail
Separate into Zones
Note: Dropping
Function and Control
dropping
When the outdoor air temperature is lower than 99°F (37°C), the fan tap must be set to L.
When the outdoor air temperature is higher than 39°F (3.8°C), the fan tap must be turned to L.
baffle (KPW945A4).
dropping
: The system stops 2 minutes after staying in the
function is working
zone and the frequency control must be carried out in such zones.
(60°C)
Control Specification (15/18/24 Class)
Dropping zone
(59°C)
(56°C)
zone.
dropping
55