Emerson EC2-XC645CX User Manual

OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX 28/54
17.8 Alarms – compressor section
PAo Alarm probe exclusion at power on. it is the period starting from instrument switch on,
before an alarm probe is signaled. (0 - 255 min). During this time if the pressure is out of
range all the compressors are switched on.
LAL Low pressure (temperature) alarm – compressor section: The measurement unit
depends on dEU parameter: (PA04 – HAL bar; -50.0 - HAL °C; PA04 - HAL PSI;
-58 - HAL °F) It’s independent from the set point. When the value LAL is reached the
A03C alarm is enabled, (possibly after the tAo delay time).
HAL High pressure (temperature) alarm– compressor section: The measurement unit
depends on dEU parameter: (LAL - PA20 bar; LAL - 150.0 °C; LAL - PA20 PSI;
LAL – 302 °F). It’s independent from the set point. When the value HAL is reached the
A04C alarm is enabled, (possibly after the tAo delay time).
tAo Low and High pressure (temperature) alarms delay– compressor section:
(0 – 255 min) time interval between the detection of a pressure (temperature) alarm
condition and alarm signaling.
ELP Electronic pressure switch threshold: (-50°C - SETC; -58°F - SETC; PA04 - SETC);
Pressure / Temperature value at which all the compressors are switched off. It has to be
set some degrees above the mechanical low pressure switch value, in order to prevent
mechanical low-pressure activation.
SEr Service request: (1 - 9990 hours, res. 10h) number of running hours after that the “A14”
maintenance call is generated.
PEn Low pressure-switch intervention numbers: (0 - 15). If the low pressure-switch is
enabled PEn times in the PEI interval, the controller is locked. Only the manually
unlocking is possible. See also the alarms table at paragraph 20 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 (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 - 15 min)
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. 3 - 4)
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)
dtLF Compressors OFF in case of discharge line temperature alarm (no, yes)
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).

Emerson EC2-XC645CX Specifications

General

Brand	Emerson
Model	EC2-XC645CX
Category	Controller
Language	English