May be subject to change Page 24 of 33Air filterThe AIR FILTER menu allows users to select the interval at which they wish the controls to activatea filter alarm, reminding them that it is time to check/replace the air filter.The system contains two plate filters in the inlet and exhaust duct, respectively. These filters mustbe controlled at least 3 times a year and replaced as required. The filters are replaced bydismounting the front cover and removing the filters. Please note that the system must be turnedoff when replacing the filters.It is possible to install an extra box with a pollen filter EU7 in the inlet duct.The controls are factory set to activate the alarm at 90 day intervals.A filter guard can be installed above the system’s filters/pollen filters.Options 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 controlsAIRFILTERALARM90 DAYSALARM”360 DAYS”ALARM”180 DAYS”ALARM”90 DAYS”ALARM”GUARD”ALARM”30 DAYS”ENTER ENTERENTERENTERENTERENTERENTERALARM”GUAR+70D”ENTERSuggestion for filter guardsettings: 2 x pressure dropfor clean filtersFigure 18: The "Air filter" menu