Technical data

Ichill 200CX EVO rev 1.1 14/11/2013
Pag. 92 of 151
AEFL: evaporator flow alarm (differential pressure switch)
Label on alarm
visualization menu
AEFL
evaporator flow alarm
Origin
Digital input active for the time set in AL15 after the water pump is on and, after
the digital input itself is activated, for the time set in AL17.
Reset
Digital input not active for the time AL18.
Restart Automatic – Manual if the digital input is active for AL16 seconds (Reset
procedure in Menu function).
Symbol
On the display the symbol
is blinking
Action
Alarm Relay + and buzzer on only during normal running conditions.
ATTENTION
The alarm relay and the buzzer are activated only if the alarm appears during normal running conditions.
When the temperature setpoint has been reached and CO16/CO21= 2, the icon
blinks without alarm.
NOTE ABOUT THE FLOW ALARM
CO16 / CO21=0 Water pump not enabled.
The alarm is managed only if one digital input is configured as flow switch, the restart is always automatic.
CO16 / CO21=1 Water pump with continuous control.
The alarm is managed only if one digital input is configured as flow switch, the restart is always automatic,
in stand–by or remote OFF ( pump off), it becomes manual after AL16 time.
In chiller or heat pump only. During the functioning of the unit any flow alarm stop the loads described in
the table, the water pump follow its regulation algorithm and is turned off, after AL16 time.
CO16 / CO21=2 Compressor on – pump on
The alarm is managed only if one digital input is configured as flow switch, the restart is always automatic,
in stand–by or remote OFF ( pump off), it becomes manual after AL16 time.
During the functioning of the unit any flow alarm stop the loads described in the table, the water pump follow
its regulation algorithm and is turned off, after AL16 time it is completely locked.
MANUAL RESTART OF THE FLOW ALARM
After AL16 time it is necessary to enter the function Menu to reset the alarm itself. The alarm message
DOES NOT DISAPPEAR if the alarm condition is still on. The water pump, if configured, can start and the
alarm is by-passed for AL18 seconds.
AL15 Alarm flow delay after on pump.
When the water pump starts the AL15 delay stops any flow alarm to reach the normal flow condition.
AL16 Maximum time flow switch alarm active befor to block the water pump
It determines maximum time of flow alarm active before to block the water pump.
ATTENTION
With air/water or water/water units and CF01=1,2 the minimum number of events per hour is 1.
AL17 Active flow input duration
Within this time the flow alarm must be active and after AL17 is expired the alarm is signalled. The counter
starts after AL15 and allows to filter the improvise flow reduction or the possible bubbles of air.
AL18 Not active flow input duration
Within this time the flow alarm must be not active and, after this time, the previous alarm is automatically
reset (if automatic) or, if manual, the unit can be restarted.
ACFL: condenser flow alarm (differential Pressure switch)
Label on alarm
visualization menu
ACFL condenser flow alarm
Origin
Digital input active for the time set in AL55 after the water pump is on and, after
the digital input itself is activated, for the time set in AL57.
Alarm not enable if AL14=0
Alarm enabled in chiller only if AL14=1
Alarm enabled in heat pump only if AL14=2
Alarm enabled in chiller and heat pump if AL14=3
Reset
Digital input not active for the time AL58.
Restart
Automatic – Manual after AL56 (Reset procedure in Menu function).
Symbol
On the display the symbol
is blinking