User manual DAIKIN FWEC2

[. . . ] automatic ventilation logic fan speed operation mode: Cooling. When flashing it indicates that water circuit is not enabled to fan ventilation. When flashing it indicates that water circuit is not enabled to fan ventilation. [. . . ] In the case of the "MASTER-SLAVE" solution a termination resistor will have to be installed on both controllers at the furthest ends of the network. : (1) Comply with the polarity of the connection: indicated with A(-) and B(+) (2) Ground shield at one end only The controller can govern 3 or 4-speed indoor units OPERATING SPEED SELECTION Using Fan key it is possible to select the following speeds: Automatic ventilation: depending on the set temperature and the room air temperature With 3-speed configurations where: 1 = low speed 2 = medium speed 3 = maximum speed With 4-speed configurations where: sm = extra-low speed 1 = low speed 2 = medium speed 3 = maximum speed 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 configurations with valve: the minimum speed available will be maintained even once the temperature has been reached. On-board controller and valveless configurations: 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 postventilation cycle will be run at medium speed. : 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 flashing: fan in standby mode On steadily lit: fan on OFF: fan disabled to operate by natural convection only 5°C to permit a natural convection phase Speed disabled: Can be selected only in heating mode and with 4-speed configuration only. the indoor unit operates by natural convection only. Extra low speed: can be selected only with 4-speed configuration. Low speed Medium speed High speed 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 Upon a call of the thermostat, the absence of the enabling signal will be indicated on the display by the flashing of the symbol representing the active mode ( or ) : 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; 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 configurations Pressing again will change this setting. The controller can manage 2 or 3-way On/OFF type valves, with 230V voltage. OPENING The valve opening is controlled according to the operating setpoint and air temperature setpoint If the electrical heater is selected by the user, it will be activated on a call from the thermostat based on the room temperature N. The related enabling logic is described below The enabling signal will not be given if the water sensor is either not present or disconnected WATER CONTROL The checking of water temperature to enable valve opening is a function that concerns only configurations with 3-way valves and electrical heater. In such configurations the water temperature will be checked in the following cases: Heating with electrical heater: operation of the electrical heater will force the fan to switch on; it is therefore necessary to prevent excessively cold water from passing through the unit. 5°C and forces the fan to run at the minimum available speed to reduce unit operation. [. . . ] Speed) Green Yellow Flap microswitch Digital 1 input Digital 2 input Digital input common RS 485 Fuse (not supplied) Circuit breaker (not supplied) Terminal board Heating/Cooling remote selecting switch Remote ON/OFF contact Circuit board to control 4 indoor units Circuit board for FWD units Fan motor Solenoid valve ­Cool/Heat. Solenoid valve - Cooling Solenoid valve - Heating Automatic safety thermostat Safety fuse Wiring box Electrical connections to be made by installer NB: for wall mounting of the controller it is advisable to use an electric box behind the controller to accommodate the cables. NB: Prior to installation, carefully remove the protective film from the display; removal of the film may cause some dark streaks to appear on the display but these will disappear after a few seconds and are not signs of a controller defect. [. . . ]