ECP
300
EXPERT STEPPER
Page
27
OPERATION AND MAINTENANCE MANUAL
Rev. 01-20
EPt
Temperature transducer type (S4):
Sets the type of
transducer used to detect the temperature (S4)
0 = NTC
1 = PT1000
2 = PTC (-45/80 °C)
0
EP4
Pressure (bar) corresponding to 4mA or 0V referred to
the Evaporation pressure probe (S5).
-1.0 ÷ EP2 bar
0.0
EP2
Pressure (bar) corresponding to 20mA or 5V referred to
the Evaporation pressure probe (S5).
EP4 ÷ 90.0 bar
12.0
CA4
Calibration of Suction temperature transducer (S4)
-10.0 ÷ +10.0 °C
0.0
CA5
Calibration of Evaporation pressure transducer (S5)
-10.0 ÷ +10.0 Bar
0.0
LSH
LSH threshold (Low overheating temperature)
Too low overheating values can cause liquid to return to the
compressor or strong oscillations.
Below the LSH value, the ELS protection intervenes, which
increases the speed of the PID when closing the valve to
move to the set overheating setting.
0.0 ÷ Set SH °C
2.0 °C
ELS
LSH protection
If enabled, when
tSH < LSH
the PID integration time is set
based on ELS selection from 1 to 7.
Setting 1 generates the fastest shut down. Upon insertion of
this protection, the SHd count for activating the LSH alarm
begins. LSH PROTECTION TAKES PRECEDENCE OVER
LOP
PROTECTION.
LSH
PROTECTION
IS
NOT
ACTIVATED DURING THE START PHASE (ESt TIME),
AND DURING THE DEFROST OR POST-DEFROST
PHASE (Edt TIME).
0 = LSH protection
and related
LSH alarm disabled
1 = 5% EtI
2 = 10% EtI
3 = 15% EtI
4 = 20% EtI
5 = 25% EtI
6 = 30% EtI
7 = 35% EtI
8 = 50% EtI
9 = 100% EtI (no correction and
only activates the LSH alarm)
2
SHd
LSH alarm activation delay
The LSH overheating alarm is signalled only after it has
remained active for the SHd time. In case of LSH alarm, valve
closure is still instantaneous. The alarm is self-resetting and
returns when
tSH ≥ LSH.
With an active alarm you have:
-
The flashing LSH word on display
-
Buzzer
0 ÷ 240 tens of seconds
30
MOP
MOP
threshold
(Maximum
Saturated
Evaporation
Temperature referring to sensor
S5
)
Represents the
maximum evaporation pressure, expressed in saturated
degrees, above which MOP protection is activated (EMO
Parameter). In case of MOP the control closes the valve
gradually to limit the evaporation temperature and prevent
the compressor from stopping for thermal protection.
(LOP+1) ÷ +99°C
+45°C
EMO
MOP protection (active with tS5>MOP)
When the evaporation temperature (tS5) is above the MOP
threshold, the control interrupts the overheating adjustment and
the valve closes trying to limit the evaporation temperature (and
therefore the pressure). The closing speed of the valve depends,
in addition to the difference between the evaporation temperature
and the MOP threshold, also on the EMO integral time
parameter: the lower it is the lower will be the valve closing time.
When this protection is inserted, the MOd count for activating
THE MOP alarm begins. THE MOP PROTECTION IS NOT
ACTIVATED DURING THE START PHASE (ESt TIME), AND
DURING THE DEFROST OR POST-DEFROST PHASE (Edt
TIME).
0 = MOP protection disabled
and also the related MOP
alarm signal
0 ÷ 500 seconds
2 second steps
0
MOd
MOP alarm activation delay:
the MOP alarm is signalled
only after the MOP protection has remained active for the MOd
time
.
The alarm is self-resetting when
"S5 Temp"
≤
MOP.
With an
active alarm you have:
-
The flashing MOP word on display
-
Buzzer
0 ÷ 240 tens of seconds
60
