General Characteristics - Daikin FWEC2 Manual De Instalación Y Funcionamiento

FWEC2

GENERAL CHARACTERISTICS

LCD controller has been designed to manage the operation of
indoor units with single-phase multispeed asynchronous motor.
Compared to the standard model it has the added features of
advanced humidity control and serial communication.
This controller allows to set (fi gure 1) up a Master-Slave system
(up to 247 slave terminals), in which one of the Microproces-
sor controllers plays the role of Master and controls all of the
other slave elements.
In this case as well the connection is made via an RS485 bus,
consisting of a simple shielded 2-conductor cable.
The master (identifi ed by the address 255) sends the following
information to the slave controllers:
(1) Operating mode (Cooling or Heating)
(2) Setpoint for room temperature.
The speed selector of each slave controller remains enabled
and the room temperature can be adjusted within a range of
± 2°C around the setpoint value transmitted by the master
controller.
MAIN FUNCTIONS AND FEATURES:
■ Air temperature adjustment through automatic variation
of fan speed;
■ Regulation of air temperature via fan on-off control (fan
runs at a fi xed speed),
■ Control of On-Off valves for two or four-pipe systems
■ Control of electrical heater for auxiliary heating.
■ Cooling/heating switching in the following modes:
- local manual switching
- remote, manual (centralised);
- automatic, depending on water temperature
- automatic, depending on air temperature
■ Dehumidify Function
■ Serial Communication
ADDITIONAL FEATURES INCLUDE:
■ no-voltage contact for external activation (e.g. window
contact, remote ON/OFF, occupancy sensor, etc.) which
may enable or disable unit operation (contact logic: see
circuit board confi guration parameters).
■ no-voltage contact for centralised remote Cooling/Heating
changeover (contact logic: see circuit board confi guration
parameters).
■ no-voltage contact for remote enabling of the economy
mode (contact logic: see circuit board confi guration pa-
rameters).
■ remote water temperature probe (accessory FWTSKAA)
■ built-in temperature probe
■ built-in humidity probe
■ remote air temperature probe (accessory FWTSKAA) (this
probe, if present, is used in place of the internal one for
the measurement of room temperature).
■ Remote humidity probe (accessory FWHSKAA - to be used
in combination with the remote temperature probe)
The control panel is composed of:
■ LCD display
■ key board
FWEC2
Advanced electronic controller
FC66002764
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Advanced electronic controller
LCD DISPLAY (SEE FIGURE 2)
(1)
(2)
(3)
ON
OFF
AUTO
KEY BOARD (SEE FIGURE 3)
Installation and
operation manual
room temperature
room humidity
set temperature
fan status. When fl ashing it indicates that fans are
off standing for a call from the thermostat. If the
symbol is steadily lit it means that the fans are
running
fan status. Fans are off as speed is set to Off or
the control is off.
automatic ventilation logic
fan speed
operation mode: Cooling. When fl ashing it indicates
that water circuit is not enabled to fan ventilation.
operation mode: Heating. When fl ashing it indicates
that water circuit is not enabled to fan ventilation.
Dehumidifi cation. When fl ashing it indicates that
the circuit is not enabled to dehumidifi cation. If the
symbol is steadily lit it means that the function is
active.
Economy option enabled
Alarm triggered
Minimum Temperature Control
valve open
electrical heater: If the symbol fl ashes it means that
the electrical heater is on; if steadily lit it means only
that the electrical heater has been selected
serial communication active. The fl ashing symbol
indicates that the controller is the master
On/Off key: Thermostat On/Off. During the proce-
dure of parameter modifi cation, it permits to return
to normal operating conditions
Up and Down keys: changing of thermostat set-
ting temperature (Heating:[5.0-30.0°C], Cooling:
[10.0-35.0°C]). During the procedure of parameter
modifi cation, they are used to select the parameters
or to change their value
SEL key: in the heating mode, the electrical heater
element can be selected as auxiliary function
Mode key: selection of Heating/Cooling operating
mode
Fan key: selection of operating speed
EC key: selection of Economy mode
Installation and operation manual
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