ECP
300
EXPERT STEPPER
Page 28
OPERATION AND MAINTENANCE MANUAL
Rev. 01-20
LOP
LOP threshold (minimum Saturated evaporation
temperature referring to sensor S5).
Represents the
minimum evaporation pressure, expressed in saturated degrees,
below which the LOP protection is activated. In case of LPO the
control opens the valve to prevent the compressor from stopping
due to low pressure (mechanical pressure switch).
-45°C ÷ (MOP-1)
-45°C
ELO
LOP protection (active with tS5 < LOP).
When
the
evaporation temperature (tS5) is below the LOP threshold, the
control interrupts the overheating adjustment and the valve
opens. The opening speed of the valve depends, in addition to
the difference between the evaporation temperature and the LOP
threshold, also on the integral time parameter ELO: the lower it is
the higher the valve opening speed will be. When this protection
is activated, the LOd count starts to activate the LOP alarm. LSH
PROTECTION
TAKES
PRECEDENCE
OVER
LOP
PROTECTION. THE LOP PROTECTION IS NOT ACTIVATED
DURING THE START PHASE (ESt TIME), AND DURING THE
DEFROST OR POST-DEFROST PHASE (Edt TIME).
0 = LOP protection disabled
and also the related LOP
alarm signal
0 ÷ 500 seconds
2 second steps
0
LOd
LOP alarm activation delay:
the LOP alarm is signalled
only after it has remained active for the LOd time. In case
of LOP alarm.
The alarm is self-resetting when
"S5 Temp” ≥ LOP
With an active alarm you have:
-
The flashing LOP word on display
-
Buzzer
0 ÷ 240 tens of seconds
30
tPF
Forced valve positioning:
via digital input (if the control is
not in standby) it is always possible to force the valve to
open at a predetermined value.
0 ÷ 100 %
50%
NOTE:
All LSH, MOP, LOP alarm calculation times are reset when the adjustment is stopped OR DURING
THE START PHASE (ESt TIME), AND DURING THE DEFROST OR POST-DEFROST PHASE (Edt TIME).
LOADING DEFAULT SETTINGS BASED ON THE EEV VARIABLE
EEV = 1
PEGO
DEFAULT
EEV = 2
(CELL control or TN
REFRIGERATION
BENCH
with compressor on
board)
EEV = 3
(CELL control or BT
REFRIGERATION
BENCH with
compressor on
board)
EEV = 4
(CELL control or TN
CHANNELED
REFRIGERATION
BENCH)
EEV = 5
(CELL control or BT
CHANNELED
REFRIGERATION
BENCH)
ESH
6 °C
6 °C
6 °C
11 °C
11 °C
EPb
15 %
15 %
15 %
15 %
15 %
EtI
100 sec
100 sec
100 sec
150 sec
150 sec
Etd
2 sec
2 sec
2 sec
5 sec
5 sec
LSH
2 °C
2 °C
2 °C
5 °C
5 °C
ELS
2
2
2
2
2
MOP
+45 °C
5 °C
-15 °C
+5 °C
-15 °C
EMO
0
5
5
5
5
LOP
-45 °C
-25 °C
-45 °C
0
0
ELO
0
15
15
0
0
5.15
CHAP. 5 - Data programming
