Daikin FWEC2 - Water Control

Installation and operation manual
6
FWEC2
Advanced electronic controller
FC66002764
With 4-speed confi gurations :
where:
sm = extra-low speed
1 = low speed
2 = medium speed
3 = maximum speed
N.B.: in case of 4-speed confi guration and valve, ventilation
in heating mode is shifted by 0.5°C to permit a natural
convection phase
■ Speed disabled: Can be selected only in heating mode
and with 4-speed confi guration only. The indoor unit oper-
ates 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
N.B.: In the case of fi xed speed, the fan on/off logic will be
equivalent to the automatic logic.
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
LOGICS
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: every
10 minutes in which the fan remains idle a 2 minute fan
rotation is carried out at medium speed to enable the air
sensor to read the room temperature more accurately.
In the heating mode
■ while the electrical heater is on: the fan is forced to run at
medium speed
■ once the electrical heater has gone off: a 2 minute post-
ventilation cycle will be run at medium speed. (N.B.: 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
■ On fl ashing: fan in standby mode
■ On steadily lit: fan on
■ OFF: fan disabled to operate by natural convection only
and fan speed (with indication of “automatic” logic if proper)
enabled or selected (in case of stand-by fan)
■
Extra low speed
■ Low speed
■ Medium speed
■ High speed
N.B.: if the active speed is different from the one selected by
the user (in the case of a forced override), pressing the
button
Fan the selected speed will be displayed;
pressing again will change this setting.
Air temp.
HEATING
Air temp.
COOLING
HEATING
COOLING
NO
NO
Water temp.
Water temp.