May be subject to change Page 19 of 33Heating surfaceThe menu HEATING SURFACE is only accesssible when the system has a heating surfaceinstalled and when the control has been set up to a heating surface in the SERVICE MENUOptions that flash are indicated by ” ”.On the CTS 602 control panel, press:- ESC to return to the previous menu- qp to scroll upwards or downwards through the menus or toadjust the setting of an activated menu option- ENTER to activate a menu option- ENTER to confirm a new menu option setting- OFF to switch off the controls- ON to switch on the controlsHEATINGSURFACESELECTOFFSELECT”OFF”SELECT”ON”ENTER ENTER ENTERENTERWhen a heating surface isinstalled T2 is replacedwith T7, which is thesensor placed in the inletat the heating surface.If you wish to disconnect theheating surface this position shouldbe chosen.The frost-protection is still activeand T7 is the active temperaturesensor for the inlet air.Figure 13: The "Heating surface" menu