!
USER MANUAL – Release 1.2 of 01/01/2010
Page 6 of 191
Version: 02/03/2010
38.1
SUPPLY FAN DURING DEFROST
112
38.2
HOT START FUNCTION
113
39.
FUNCTION OF SUPPLY FAN MAINTENANCE REQUEST
113
40.
CONDENSER WATER PUMP WORKING
113
40.1
ONLY ONE RELAY CONFIGURED AS CONDENSER WATER PUMP
113
41.
CONDENSER WATER PUMP ROTATION
114
41.1
2 RELAYS CONFIGURED AS CONDENSER WATER PUMP
114
41.2
ROTATION OF THE CONDENSER WATER PUMPS FROM DIGITAL INPUT
114
42.
CONDENSER PUMP ANTI-FREEZE MANAGEMENT
114
43.
WATER PUMP MAINTENANCE REQUEST FUNCTION
115
44.
SWITCH-ON/OFF WORKING WITH PUMP-DOWN
115
44.1
PUMP-DOWN FUNCTION WITH CIRCUIT LOW PRESSURE PRESSURE SWITCH
116
44.2
PUMP-DOWN FUNCTION WITH DEDICATED PRESSURE SWITCH
116
44.3
PUMP-DOWN FUNCTION FROM ANALOGUE INPUT
116
44.4
PUMP-DOWN FUNCTION IN COOLING MODE ONLY (Configuration possible only for reversible
units with the enabling of the working of the compressors in heating mode).
116
44.5
LOW PRESSURE ALARM DURING THE PUMP-DOWN
116
44.6
WORKING EXAMPLES:
117
44.6.1
Pump-down active only in switch-off based on LP pressure switch.........................................117
44.6.2
Pump-down active in switch-off and re-start, based on dedicated pressure switch. Pump-down
pressure switch intervention threshold higher than the intervention threshold of the LP pressure switch.117
44.6.3
Pump-down active in switch-off and re-start, based on dedicated pressure switch. Pump-down
pressure switch intervention threshold lower than the intervention threshold of the LP pressure switch.117
44.6.4
Pump-down active in shut-down and in re-start, based on the analogue input relative to the
evaporation pressure..............................................................................................................................118
44.7
TIMED PUMP DOWN FUNCTION
118
44.8
PUMP DOWN ALARM IN START-UP AND STOPPING
118
45.
CIRCUITS UNLOADING
119
45.1
UNLOADING FROM CONDENSATION HIGH TEMPERATURE PROBE
119
45.2
UNLOADING FROM CONDENSATION HIGH TEMPERATURE TRANSDUCER
120
45.3
UNLOADING BY LOW PRESSURE TRANSDUCER
121
45.4
UNLOADING DUE TO EVAPORATOR WATER INLET HIGH TEMPERATURE
121
45.5
EVAPORATOR WATER LOW TEMPERATURE UNLOADING (NO AIR-AIR)
121
45.6
WORKING IN UNLOADING MODE NOTES
122
46.
CONDENSATION FANS REGULATOR
122
46.1
IF THE PWM/ 0÷10V SIGNAL TRIAC OUTPUT IS USED
123
46.2
IF THE STEP RELAY OUTPUTS ARE USED
123
46.3
UNIQUE OR SEPARATE CONDENSATION
124
46.4
PROPORTIONAL FAN REGULATOR GRAPHICS
125
46.5
CONDENSATION FAN REGULATOR ON / OFF IN COOLING MODE GRAPHICS
125
46.6
CONDENSATION FAN REGULATOR ON / OFF IN HEATING MODE GRAPHICS
125
47.
ANTI-FREEZE/SUPPORT HEATERS REGULATOR
126
47.1
HEATER OUTPUT WORKING IN COOLING OR HEATING MODE
126
47.2
TEMPERATURE CONTROL IN COOLING MODE
126
