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5 - PRO-DIALOG PLUS CONTROL OPERATION .................................................................................................................27
5.1 - Start/stop control ................................................................................................................................................................27
5.2 - Heating/cooling selection ...................................................................................................................................................27
5.3 - Evaporator water pump control ..........................................................................................................................................28
5.4 - Condenser water pump control...........................................................................................................................................28
5.5 - Control interlock contact ....................................................................................................................................................28
5.6 - Evaporator heater control ...................................................................................................................................................28
5.7 - Control point......................................................................................................................................................................28
5.7.1 - Active setpoint ...........................................................................................................................................................28
5.7.2 - Reset...........................................................................................................................................................................28
5.8 - Demand limit ......................................................................................................................................................................29
5.9 - Capacity control ................................................................................................................................................................29
5.10 - Determining the lead circuit............................................................................................................................................29
5.11 - Circuit loading sequence ..................................................................................................................................................29
5.12 - Slave compressor start-up sequence ................................................................................................................................30
5.13 - Controlling the EXV ........................................................................................................................................................30
5.14 - Head pressure control on air-cooled units .......................................................................................................................30
5.15 - Head pressure control on water-cooled units...................................................................................................................30
5.16 - Active setpoint selection ..................................................................................................................................................30
5.17 - High pressure load shedding function..............................................................................................................................31
5.18 - Pumping down..................................................................................................................................................................31
5.19 - Master/slave assembly .....................................................................................................................................................31
5.20 - Controlling Pro-Dialog Plus units with a System Manager.............................................................................................31
5.21 - Optional heat reclaim module ..........................................................................................................................................32
6 - DIAGNOSTICS - TROUBLESHOOTING ............................................................................................................................32
6.1 - General ...............................................................................................................................................................................32
6.2 - Displaying alarms ...............................................................................................................................................................32
6.3 - Resetting alarms .................................................................................................................................................................32
6.4 - Alarm codes........................................................................................................................................................................33