54.4 WORKING 148
54.5 FREE-COOLING WORKING IN HEATING MODE 149
54.6 ANTI-FREEZE ALARM PREVENTION 149
54.7 FREE COOLING VENTILATION WORKING MODE 150
54.8 FRACTIONED BATTERY 150
55. AUXILIARY RELAY FUNCTION 151
55.1 DIRECT ACTION WORKING ENABLED 151
55.2 REVERSE ACTION WORKING ENABLED 151
56. WORKING OF THE AUXILIARY ANALOGUE OUTPUTS (0÷10
VOLT) 152
57. ALARMS 153
57.1 COMPRESSORS BLOCK ALARMS 153
57.2 PROBE BREAKDOWN 154
57.3 HIGH PRESSURE PRESSURE SWITCH ALARM 154
57.4 COMPRESSOR FLOW HIGH TEMPERATURE ALARM FROM DIGITAL INPUT 155
57.5 LOW PRESSURE PRESSURE SWITCH ALARM 156
57.6 OIL FLOAT/PRESSURE SWITCH ALARM 157
57.7 CONDENSATION TEMPERATURE/HIGH PRESSURE ALARM 158
57.8 LOW CONDENSATION TEMPERATURE/PRESSURE (IF THE LOW PRESSURE
TRANSDUCERS ARE NOT USED) 159
57.9 LOW EVAPORATION PRESSURE IF THE LOW PRESSURE TRANSDUCERS ARE USED 160
57.10 AIR/AIR UNIT EVAPORATOR/CONDENSER AIR OUTLET LOW TEMPERATURE IN COOLING
WORKING MODE ANTI-FREEZE ALARM 161
57.11 AIR/AIR UNIT EVAPORATOR/CONDENSER AIR OUTLET LOW TEMPERATURE IN HEATING
WORKING MODE ANTI-FREEZE ALARM 162
57.12 COLD SIDE FLOW SWITCH ALARM (DIFFERENTIAL PRESSURE SWITCH) 163
57.13 HOT SIDE FLOW SWITCH ALARM (DIFFERENTIAL PRESSURE SWITCH) 164
57.14 SUPPLY FAN CIRCUIT BREAKER ALARM 166
57.15 DOMESTIC HOT WATER PUMP FLOW SWITCH ALARM 167
57.16 DOMESTIC SOLAR PANELS WATER PUMP FLOW SWITCH ALARM 167
57.17 CIRCUIT BREAKER ALARM 168
57.18 DISCHARGE COMPRESSORS HIGH TEMPERATURE ALARM FROM ANALOGUE INPUT 169
57.19 EVAPORATOR WATER INLET HIGH TEMPERATURE ALARM 169
57.20 CONDENSATION FAN CIRCUIT BREAKER ALARM 170
57.21 DEFROST ALARM 171
57.22 UNLOADING SIGNAL DUE TO HIGH CONDENSATION TEMPERATURE/PRESSURE IN
COOLING WORKING MODE 172
57.23 HEAT RECOVERY DISABLING SIGNAL DUE TO HIGH CONDENSATION
TEMPERATURE/PRESSURE IN COOLING WORKING MODE 173
57.24 UNLOADING SIGNAL DUE TO LOW EVAPORATION PRESSURE IN HEATING WORKING MODE174
57.25 UNLOADING SIGNAL DUE TO EVAPORATOR WATER INLET HIGH TEMPERATURE 175
57.26 PUMP DOWN ALARM WITH LOW PRESSURE PRESSURE SWITCH/TRANSDUCER IN
STOPPING 176
57.27 PUMP DOWN ALARM WITH LOW PRESSURE TRANSDUCER IN START-UP 177
57.28 EVAPORATOR WATER PUMPING UNIT CIRCUIT BREAKER ALARM 178
57.29 HEAT RECOVERY CONDENSER WATER PUMPING UNIT CIRCUIT BREAKER ALARM 179
57.30 UNIT N. 1 BLOCK GENERAL ALARM 179
57.31 UNIT N. 2 BLOCK GENERAL ALARM 180
57.32 COMPRESSORS MAINTENANCE ALARM 181
57.33 FLOW FAN PUMPS MAINTENANCE ALARM 181
57.34 CONDENSER PUMPS MAINTENANCE ALARM 181
57.35 RTC ALARM 182
57.36 RTF ALARM 182
57.37 EEPROM ALARM 182
57.38 NETWORK FREQUENCY ALARM 183
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