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CONTENTS
13 - MANAGEMENT OF THE FUNCTIONS ..................................................................................................................................... 73
13.1 - Management of the compressor protections ......................................................................................................................... 73
13.2 - Management of the time counters ......................................................................................................................................... 73
13.3 - Management of compressor start-up .................................................................................................................................... 73
13.4 - Compressor stopping sequence :.......................................................................................................................................... 74
13.5 - Management of the reversing valves .................................................................................................................................... 75
13.6 - Management of configurable output P111 : ........................................................................................................................... 75
14 - SELF-ADJUSTING FUNCTIONS .............................................................................................................................................. 76
14.1 - Self-adjusting function: water frost limit ................................................................................................................................. 76
14.2 - Self-adjusting function: refrigerant frost limit ......................................................................................................................... 76
14.3 - Self-adjusting function: HP pressure limit .............................................................................................................................. 76
14.4 - Self-adjusting function: discharge protection, circuit 1 or 2 ................................................................................................... 77
14.5 - Self-adjusting function: minimum HP, circuit 1 or 2 ............................................................................................................... 77
14.6 - Self-adjusting function for high water return temperatures.................................................................................................... 77
15 - FAULT FUNCTIONS ................................................................................................................................................................. 78
15.1 - Water frost limit fault on circuits 1 and 2 ............................................................................................................................... 78
15.2 - Refrigerant frost limit fault on circuits 1 and 2 ....................................................................................................................... 78
15.3 - HP pressure fault, circuits 1 and 2 ........................................................................................................................................ 79
15.4 - Discharge temperature fault, circuit 1 or 2 ............................................................................................................................ 79
15.5 - LP fault on circuit 1 or 2 ......................................................................................................................................................... 80
15.6 - Management of superheat faults ........................................................................................................................................... 81
16 - CONTROLS ............................................................................................................................................................................... 82
16.1 - Main control in cooling and heating modes ........................................................................................................................... 82
16.2 - Water temperature setpoint adjustment ................................................................................................................................ 83
16.3 - Adjustment of water temperature setpoint if P7 ≠ INVERTER .............................................................................................. 83
16.4 - Adjustment of setpoint for the water supply and return temperatures (P141 = 1 or 2) if P7 = INVERTER ........................... 86
16.5 - Storage control ...................................................................................................................................................................... 88
16.6 - Control setpoint (P251) management ................................................................................................................................... 88
16.7 - Automated self-regulating control .......................................................................................................................................... 89
16.8 - Control for bus connection to the Drycooler controller in FREECOOLING mode ................................................................. 89
17 - CONTROL OF CONDENSING PRESSURE FOR AIR-COOLED UNITS ................................................................................. 90
17.1 - Control during normal operation or on/off control .................................................................................................................. 90
17.2 - Forced and self-adjusting control .......................................................................................................................................... 91
17.3 - Fan speed control.................................................................................................................................................................. 91
17.4 - Low Noise control (single-fan units only)............................................................................................................................... 95
17.5 - Total recovery control ............................................................................................................................................................ 96
17.6 - Management of the air blades if P10 = Centrifugal ............................................................................................................... 96
18 - CONTROL OF CONDENSING PRESSURE FOR WATER-TO-WATER UNITS ....................................................................... 98
18.1 - Operation with a two-way valve............................................................................................................................................. 98
18.2 - Operation with a three-way valve .......................................................................................................................................... 98
19 - RESTRICTION OF OPERATION OF THE MACHINES BASED ON THE OUTDOOR TEMPERATURE ................................ 99
19.1 - Restriction to the minimum air temperature in heating mode ................................................................................................ 99
19.2 - Restriction to the maximum air temperature in cooling mode ............................................................................................... 99
19.3 - Restriction to the maximum air temperature in heating mode : ........................................................................................... 100
19.4 - Restriction to the minimum air temperature in cooling mode : ............................................................................................ 100
20 - MANAGEMENT OF THE AUXILIARY HEATER BOARD AND THE ELECTRIC AUXILIARY HEATERS ............................. 101
21 - MANAGEMENT OF THE BACK-UP BOILER ......................................................................................................................... 103
22 - MASTER/SLAVE CONTROL ................................................................................................................................................... 104
22.1 - Case of two parallel-connected machines........................................................................................................................... 104
23 - ACTUATION OF THE ELECTRONIC EXPANSION VALVE .................................................................................................... 108
23.1 - With Alco driver and display ................................................................................................................................................ 108
23.2 - With VCM driver .................................................................................................................................................................. 108
24 - IMPORTANT INFORMATION REGARDING THE CONTROL OF AN INVERTER COMPRESSOR ...................................... 110
25 - DEFROSTING OF THE EVAPORATOR COILS ...................................................................................................................... 112
26 - HOURLY PROGRAMMING ..................................................................................................................................................... 113
26.1 - Presentation ........................................................................................................................................................................ 113
26.2 - Definition of the programming stages.................................................................................................................................. 113
26.3 - Definition of holiday zones. ................................................................................................................................................. 113
26.4 - Operation............................................................................................................................................................................. 113
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