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17.1 GENERAL INFORMATION
17.1.1 Specific features
(1) Less refrigerant charge amount due to use of double phase refrigerant flow system. The total refrigerant charge amount has been
reduced by more than 50%.
(2) The indoor outdoor interconnection signal wiring has been done away with. The microcomputer chip is installed in the indoor unit.
There is no need for the unit to communicate between the outdoor and indoor units so the unit is more resistant to electromagnetic
noise thus the incidence of microcomputer malfunction has been reduced. The compressor in the outdoor unit has its own self
protection function, that reacts according to abnomal high pressure and excessive high temperature.
(3) There are only five power lines between the outdoor and indoor unit. As no signal wire is used there is no need to separate the
power line from the signal line. One cab type cable with 6 wires encased in one sheath is enough for conducting the wiring work
between the outdoor unit and the indoor unit. This contributes to simpler wiring work in the field.
(4) All models have service valves protruding from the outdoor unit for faster flare connection work in the field.
(5) Simple design
The unit has a thickness that masures a mere 7.24 inches, making it the thinnest floor standing air-conditioning unit in its class.
(6) Self-diagnosing function
If any of troubles, such as an abnomality with the power supply and disconection in the thermistor circuit, has occured, such
abnormality, etc. are indicated by a blinking signal, displaying the trouble mode in letters on the liquid crystal display of the remote
controller. It is also possile to monitor any such abnormality with a checking switch. When plural units are controlled. No. of the
unit in trouble is also indicated.
17.1.2 How to read the model name
Example: FDFL
30 8 H
EN -SA
Applicable power source ... See the specifications
Heat pump type
Series No.
Nominal capacity
Model name
FDFL-H
FDFL: Floor standing type
FDC:
Outdoor unit
657
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