Daikin FWEC1 - Ventilation; Operating Speed Selection

Installation and operation manual
5
FWEC1
Standard electronic controller
FC66002763
WATER CONTROL
The ventilation operation depends on the system water
temperature control. Based on the operation mode, different
heating or cooling thresholds will be enabled.
Upon a call of the thermostat, the absence of the enabling
signal will be indicated on the display by the fl ashing of the
symbol representing the active mode (
or )
The enabling signal is ignored:
■ If the water sensor is not included (P04 = 0) or in alarm
status because disconnected
■ In the cooling mode with 4-pipe confi gurations
FORCED OVERRIDES
The normal fan operating logic will be ignored in particular
override situations that may be necessary to ensure correct
control of the temperature or the unit’s operation. This may
occur:
in the cooling mode:
■ on-board controller (P01 = 0) and confi gurations with valve:
the minimum speed available will be maintained even once
the temperature has been reached.
■ On-board controller and valveless confi gurations: after
every 10 minutes in which the fan remains idle a 2 minute
cleaning is carried out at medium speed to enable the air
sensor to read the room temperature more correctly.
In the heating mode
■ While the heating element is on: the fan is forced to run at
medium speed
■ Once the heating element has gone off: a 2 minute post-
ventilation cycle will be run at medium speed. (NB: this
cycle will be completed even if the thermostat is switched
off or in the event of a changeover to the cooling mode).
DISPLAY
The display shows the fan status
■ Stb: fan in standby mode
■ On: fan on
■ noF: fan disabled to operate
by natural convection only
VENTILATION
The controller can govern 3 or 4-fan speed indoor units
OPERATING SPEED SELECTION
Using Fan
key it is possible to select the following
speeds:
■ AUTO Automatic fan speed: depending on the set
temperature and the room air temperature.
With 3-speed confi gurations:
where:
1 = low speed
2 = medium speed
3 = maximum speed
With 4-speed confi gurations
where:
sm = extra-low speed
1 = low speed
2 = medium speed
3 = maximum speed
NB: in case of 4-speed confi guration and valve, or 3-speed
confi guration + CN (natural convection), ventilation in
heating mode is shifted by 0.5°C to permit a natural
convection phase
■ NO SYMBOLS Speed disabled. Can be selected only in
heating mode and with 4-speed confi guration or 3-speed
confi guration + CN (natural convection) only. The indoor
unit operates by natural convection only.
■
Extra low speed. Can be selected only with 4-speed
confi guration. It works at extra low speed only.
Low speed
Medium speed
High speed
NB In the case of fi xed speed, the fan on/off logic will be
equivalent to the automatic logic.
HEATING
Water temp.
COOLING
Water temp.
Air temp.
HEATING
Air temp.
COOLING
Air temp.
COOLING
Air temp.
HEATING