Code Description Def Min Max UOM User
User
terminal
1 = always off
F3
Evaporator fans during defrost
0/1 = on/off
1 0 1 - S NO
Fd Post-dripping time after defrost (fans off with control active) 1 0 15 min S NO
Fpd
Evaporator fans during post-dripping
0/1 = On/Off
0 0 1 - 0 NO
Variable-speed fans (EC fans)
The installation of variable-speed fans may be useful in optimising energy consumption. In this case, the
fans are powered by the mains, while the control signal may come via output Y1 or Y2, set as 0-10 Vdc.
Note: this function is only available on models with analogue outputs (Y1, Y2)
The maximum and minimum fan speed can be set using advanced parameters F6 and F7.
If using the fan speed controller, F5 represents the temperature below which the fans are activated.
There is a fixed hysteresis of 1°C for deactivation.
Code Description Def Min Max UOM User
User
terminal
F5 Evap. fan cut-off temperature (hyst. 1°C) 50 F1 50 °C/°F S NO
Fig.5.w
Ref. Description
Sa Probe set by parameter FSa
Sb Probe set by parameter FSb
F5 Fan cut-off temperature
F1 Fan activation threshold
Ref. Description
Frd Differential
t time
FAN Evaporator fans
The advanced parameters for the evaporator fans concern the minimum and maximum speed and the
peak time.
Code Description Def Min Max UOM User
User
terminal
F6 Max evaporator fan speed 100 F7 100 % M NO
F7 Min evaporator fan speed 0 0 F6 % M NO
F8
Evaporator fan peak time
0 = Function disabled
0 0 240 s M NO
F10
Evaporator fan forcing time at max speed
0 = Function disabled
0 0 240 min M NO
F6: is the maximum fan speed, expressed as a % of the output. For 0 to 10 V outputs, it represents the
output voltage at maximum speed as a percentage. The same is true for the minimum speed set for F7.
The fan peak time F8 represents the operating time at maximum speed set using parameter F6 to
overcome the mechanical inertia of the motor.
F10 represents the frequency at which the fan is operated at maximum speed for the peak time (F8). If
the fan operates too long at low speed, ice may form on the blades; to avoid this, at intervals of every F10
minutes, the fan is switched on at maximum speed for the time set for parameter F8.
70|5. Functions
MPXone +0300086EN rel. 1.0– 04.09.2018
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