Daikin UATYQ20-115ABAY1, Руководство по обслуживанию, Страница: 4 / 104

We reserve the right to make changes without prior notice
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6.3.2 Control logic of supply and return plug-fans on temperature setpoint ....................................... 35
6.3.3 Dampers management .............................................................................................................. 36
6.3.3.1 Control logic of dampers ........................................................................................................................ 36
6.3.3.2 Minimum opening of recirculation damper ............................................................................................. 36
6.3.3.3 Reduction of minimum external air damper opening based on outdoor air temperature ....................... 36
6.3.4 Automatic acquisition of air flow value as setpoint .................................................................... 36
6.3.5 Manual operation ....................................................................................................................... 37
6.3.6 Fan overload switch alarm ......................................................................................................... 37
6.3.7 Air flow alarm ............................................................................................................................. 37
6.4 T
EMPERATURE REGULATION SYSTEM
...................................................................................................... 37
6.4.1 Air cooling .................................................................................................................................. 37
6.4.1.1 Compressor cooling .............................................................................................................................. 37
6.4.1.2 Free cooling ........................................................................................................................................... 38
6.4.2 Air heating .................................................................................................................................. 39
6.4.2.1 Compressor heating .............................................................................................................................. 39
6.4.2.2 Hot water coil heating ............................................................................................................................ 40
6.4.2.3 Heating with a gas-fuelled generator ..................................................................................................... 40
6.4.2.4 Heating with electric heaters ................................................................................................................. 40
6.4.2.5 Free heating .......................................................................................................................................... 41
6.4.2.6 Combined management of heating devices .......................................................................................... 42
6.4.3 Ambient air humidity regulation ................................................................................................. 42
6.4.3.1 Air dehumidification ............................................................................................................................... 42
6.4.3.2 Air humidification ................................................................................................................................... 43
6.4.4 Ambient air quality control .......................................................................................................... 43
6.4.5 Damper opening control in function of condensing/evaporation pressure ................................ 44
6.4.6 Heat recovery ............................................................................................................................. 44
6.5 S
UMMER TO
W
INTER MODE SWITCHING
.................................................................................................. 45
6.5.1 Summer to Winter mode switching using the keyboard ............................................................ 45
6.5.2 Summer to Winter mode switching using a digital input ............................................................ 45
6.5.3 Automatic Summer to Winter mode switching ........................................................................... 45
6.6 C
OMPRESSOR AND REFRIGERANT CIRCUIT OPERATION
............................................................................ 45
6.6.1 Compressor switch-on and switch-off ........................................................................................ 45
6.6.2 Compressor alternation and power equalisation ....................................................................... 46
6.6.3 Condensation control ................................................................................................................. 46
6.6.4 Evaporation control .................................................................................................................... 46
6.6.5 High and low pressure alarm prevention function ..................................................................... 47
6.6.6 Defrosting ................................................................................................................................... 47
6.6.6.1 Pressure-driven defrost ......................................................................................................................... 47
6.6.6.2 Temperature-driven defrost ................................................................................................................... 48
6.6.6.3 Variable defrost ..................................................................................................................................... 48
6.6.6.4 External air damper control logic during defrost .................................................................................... 49
6.6.7 Compressor alarms .................................................................................................................... 49
6.6.7.1 High pressure alarms ............................................................................................................................ 49
6.6.7.2 Low pressure alarms ............................................................................................................................. 49
6.6.7.3 Compressor thermal overload protector alarms .................................................................................... 49
6.6.8 Hot gas circuit in external coils .................................................................................................. 49
6.7 S
ECONDARY FUNCTIONS
........................................................................................................................ 50
6.7.1 Dirty filters alarm ........................................................................................................................ 50
6.7.2 Washing function ....................................................................................................................... 50
6.7.3 Limitation of air delivery temperature ......................................................................................... 50
6.7.4 Setpoint offset ............................................................................................................................ 51
6.7.5 Enthalpy-based free cooling/free heating .................................................................................. 52
6.7.6 Hot water anti-freeze function in coil .......................................................................................... 53
6.7.7 Management of heater in condensate tray ................................................................................ 53
6.7.8 Maintenance .............................................................................................................................. 53
6.7.9 Maintenance alarms ................................................................................................................... 53
6.7.10 Alarm history .............................................................................................................................. 53
7 CONTROLLER SCREENS ...................................................................... 54
7.1 G
ENERAL
.............................................................................................................................................. 54
7.2 S
OFTWARE BRANCHES
........................................................................................................................... 54
7.2.1 Screen tree ................................................................................................................................ 55
7.3 S
CREEN STRUCTURE
............................................................................................................................. 55
7.4 H
OME SCREEN AND MAIN MENU
.............................................................................................................. 56
7.5 U
NIT
ON/OFF
MENU
............................................................................................................................. 57
7.6 M
ANUFACTURER MENU
.......................................................................................................................... 57
7.6.1 Initialization branch .................................................................................................................... 58