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unlocking is possible. See also the alarms table at paragraph 18.4. Every time the
pressure-switch is enabled all the compressor are turned off.
PEI: Pressure-switch interventions time (0÷15 min) Interval, linked to the Pen parameter,
for counting interventions of the low pressure-switch..
SPr: number of steps engaged with faulty probe. (0÷#compr).
17.9 Alarms – DLT section
dtL DGS discharge line alarm temperature (alarm always referred to P3 probe) (0÷180°C;
32÷356°F). If the probe 3 is used to detect the temperature of the discharge line of the
DGS compressor, the compressor is switched off when this threshold is reached.
dLd DGS discharge line temperature alarm delay (alarm always referred to P3 probe)
(0÷15min)
dLH DGS discharge line alarm reset differential (alarm always referred to P3 probe)
(0.1÷25.5°C; 1÷50°F)
dtLi Probe selection for the discharge line temperature monitoring:
nP: function disabled
P3: probe P3 (term. 38-42)
P4: probe P4 (term. 22-23)
dtLP Digital Compressor Capacity percentage in case of discharge line temperature alarm
(0÷80%; with 0 the compressor is stopped)
17.10 Alarms – fans section
LAF: Low pressure alarm – fans section: The measurement unit depends on the dEU
parameter: (FA04 ÷ HAF bar; -50.0÷HAF °C; FA04÷HAF PSI; -58÷HAF °F) It’s
independent from the set point. When the value LAF is reached the LA2 alarm is enabled,
(possibly after the AFd delay time).
HAF: High pressure alarm – fans section: The measurement unit depends on the dEU
parameter: (LAF÷FA20 bar; LAF÷150.0 °C; LAF÷FA20 PSI; LAF÷302 °F). It’s
independent from the set point. When the value HAF is reached the HA2 alarm is enabled,
(possibly after the AFd delay time).
AFd: Low and High pressure alarms delay – fans section: (0÷255 min) time interval
between the detection of a pressure alarm condition in the fans section and alarm
signaling.
HFC Compressors off with high pressure (temperature) alarm for fans
no = compressors are not influenced by this alarm
yES = compressors are turned off in case of high pressure (temperature) alarm of fans
HFdP Digital Compressor Capacity percentage in case of high condenser pressure
(temperature) alarm (0÷80%; with 0 the compressor is stopped)
dHF Interval between 2 compressors turning off in case of high pressure (temperature)
alarm for fans (0 ÷ 255 sec)
PnF: High pressure-switch intervention numbers – fans section: (0÷15 with 0 the manually
unlocking is disabled) if the high pressure-switch is enabled PnF times in the PiF interval,
the controller is locked. It can be unlocked only manually. See paragraph 18.4. Every
time the pressure-switch is enabled all the compressors are turned off and all the fans
are turned on.
PiF: Pressure-switch interventions time – fans section (1÷15 min) Interval, linked to the
PEn parameter, for counting interventions of the high pressure-switch..
FPr Number of fans engaged with faulty probe. (0÷#fans).
17.11 Suction superheat
ASH0 Differential for low superheat pre-alarm. (0.1 to 30.0°C/ 1 to 60°F).
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