Pump down phase duration (par. dH1)
Code Description Def Min Max UOM User
User
terminal
dH1
Pump down phase duration
0 = pump down disabled
0 0 999 s M NO
The pump down phase is the period in which the evaporator is emptied of liquid refrigerant. Parameter
dH1 defines the duration of the pump down phase during all types of defrost, heater or hot gas.
Important: the controller does not have two separate outputs to manage the compressor and
solenoid valve.
Running time defrost (par. d10, d11)
Running time is a special function that determines when the refrigeration unit needs defrosting. In
particular, it is assumed that if the evaporator temperature measured by probe Sd remains continuously
below a certain set threshold (d11) for a certain time (d10), the evaporator may be frozen and a defrost is
activated. The time is reset if the temperature returns above the threshold.
Code Description Def Min Max UOM User
User
terminal
dt1 End defrost temperature (read by Sd) 8 -50 50 °C/°F S YES
dt2 End defrost temperature (read by Sd2) 8 -50 50 °C/°F S NO
d10
Defrost time in Running time mode
0 = function disabled
0 0 240 min S NO
d11 Defrost temperature threshold in Running time mode -30 -50 50 °C/°F S NO
Fig.5.t
Ref. Description
Sd Defrost probe
DEF Defrost
Ref. Description
t time
Pressure probe alarm management during defrost (par. d12)
During defrosts and dripping, so as to avoid false pressure probe error signals, errors are ignored. The
supervisor update also needs to be disabled.
Code Description Def Min Max UOM User
User
terminal
d12
Pressure probe alarm management during defrost
probe error supervisor update
0 disabled enabled
1 enabled enabled
2 disabled disabled
3 enabled disabled
0 0 3 - M NO
66|5. Functions
MPXone +0300086EN rel. 1.0– 04.09.2018
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