1592015820 User manual IC260_261L_D DUO FW1.9 rel. 1.0
Pag. 86 of 149
It determines a temperature/pressure setpoint under which the dF19 starts counting, when dF19 is expired if
the temperature/pressure is still lower than dF20 the defrost is immediately executed.
ATTENTION If during the dF19 counting the temperature rises over df20+dF21(differential) the process is
aborted and the dF19 time reloaded.
dF21
Forced defrost differential
dF22
defrost mode for unit with two circuits
Operative mode:
0= Independent
1= The condition are satisfied in both circuits
2= At least one circuit has reached the start condition
dF23
It determines the end of the defrost for unit having two circuit and common condensing ventilation
Operative mode:
0= Independent
1= The end defrost condition are satisfied In both circuits
2= At least one circuit has reached the end defrost condition
dF24
Start / stop defrost probe
Start / stop defrost from analog input
0= start and stop with condenser temperatur / pressure probe
1= start with evaporator pressure probe / stop with condenser temperatur / pressure probe
2= start with condenser temperatur / pressure probe / stop with evaporator pressure probe
3= start and stop with evaporator pressure probe
40.9 Defrost Dynamic Set Point
It is possible to modify the start defrost set point according to outside temperature.
Offset set point if dF37>0
Offset set point if dF37<0
