INSTALLATION AND OPERATION MANUAL

ADJUSTMENT AND CONTROLTable of alarmsCodeAlarmType of alarminputCOMPRESSORSEXCHANGER FANS(WITH LOSS)PRIMARY CIRCUIT PUMPSEXCHANGER RESISTANCESPRIMARYAUXILIARY OUTPUTEr05Low pressure -sequence meter + fans thermal switch - inverterthermal switchEr10* Compressor 1 thermal protection M ID1High pressureEr11* Compressor 2 thermal protection M ID2Notes:(1) A = automatic reset, M = manual reset(2) Only when the alarm becomes manual resetA/M (2) ID3 OFF OFFEr05 Low pressure – Sequence meterThe alarm becomes manual reset when the number of events per hour is more than 3.The alarm is bypassed for 120 seconds from activation of the compressor or the reverse cycle valve.Er20 Differential pressure switchThe alarm is activated if the associated digital input remains activated for at least 5 seconds and automatically resets if thedigital input remains not activated for at least 3 seconds. The alarm becomes manual reset if the digital input remains activatedfor more than 10 seconds.The alarm is bypassed for 30 seconds from pump activation.Er30 AntifreezeThe alarm is bypassed for 3 minutes from switching on of the unit (in heating mode only).OFFcomp.1OFFcomp.2Er20 Primary circuit water differential pressure switch A/M ID6 OFFOFF ifmanualresetOFFEr21 Primary circuit pump 1 thermal protection M ID4 OFF OFF OFF p.1 OFFEr22 Primary circuit pump 2 thermal protection M ID5 OFF OFF OFF p.2 OFFEr30 Primary circuit antifreeze M AI2 OFFEr45 Clock fault error AEr46 Clock to be set error AEr47 Remote keyboard communication error AEr60 Primary exchanger inlet water temperature probe fault A AI1 OFF OFF OFF OFF OFFEr61 Primary exchanger outlet water temperature probe fault A AI2 OFF OFF OFF OFF OFFEr62 Liquid temperature probe A AI3Er68 External air temperature probe fault A AI4Er80 Configuration error A OFF OFF OFF OFF OFFEr90 Recordings for alarms history exceeded signalling MEr62 Liquid probe faultWhen the alarm is activated the fans work with on-off logic by compressor request. The defrost input and output are managedaccording to compressor operation time.Er68 Outside air probe faultWhen the alarm is activated, climate adjustment in heating and dynamic defrost are unavailable.Er90 Maximum number of recordings in alarms history exceededIndicates that the alarms history buffer is full. Every new alarm will be memorised, cancelling the oldest alarm.61