Emerson Dixell XC645D User Manual

1592001830 XC645D GB r3.4 04.09.2017.docx XC645D 41/50
Electronic low pressure: every time the suction temperature/pressure is less than ELP value all
the compressors are switched off. The instrument restarts the standard operating mode when
pressure/ temperature increases.
20.1.3 E0H1, E0L1 Pressure switch alarm, suction and condensing
sections
Terminals
WARNING: THESE TERMINALS REQUIRE A MAIN OF VOLTAGE CONNECTION
Low pressure switch input: 44-45, high pressure switch input: [45-46].
Parameters
iP10: Low pressure switch polarity: It establishes if the input is activated by giving (iP10=cL)
or by removing (iP10=oP) main voltage to the terminals.
iP09: High pressure switch polarity: It establishes if the input is by giving (iP09=cL) or by
removing (iP09=oP) main voltage to the terminals.
Actions
Low pressure: every time the inputs are activated all the compressors are switched off. The
instrument restart the standard operating mode when the input is disabled. If there are PEn
activation in the PEi time, only manual resetting is allowed, by pressing the DOWN key for 3s or
by turning off and on the instrument.
High pressure: every time the inputs are activated all the compressors are switched off and fans
are switched on. The instrument restart the standard operating mode when the input is disabled.
If there are PnF activation in the PiF time, only manual resetting is allowed, by pressing the DOWN
key for 3s or by turning off and on the instrument.
20.1.4 EA1÷EA4: Compressors and fans safeties alarm.
Terminals
WARNING: THESE TERMINALS REQUIRE A FREE OF VOLTAGE CONNECTION.
The terminals (from 13 TO 18) really used depends on the number of loads. The protections
regarding the compressors and fans are connected to these inputs. If one of these protections is
enabling (E.I. for lack of oil or overheating, etc,) the corresponding load is turn off.
Parameters
iP01, iP02, iP03, iP04: establish if the input is activated by closing (cL) or by opening (=oP) the
terminals.
Actions
Every time one input is activated the corresponding output is turned off.
Recovery
Recovery depends on ALMr parameter:
With ALMr = no The instrument restart the standard operating mode when the input is disabled.
With ALMr = yES manual recover for the alarms of compressors and fans. Push the DOWN key
for 3s.
20.1.5 P1, P2; P3,P4: probe failure alarm
It is generated by failure in the probe P1, P2 , P3 or P4.
In case of P1 fault, number of steps engaged depends on the SPr parameter
In case of P2 fault, number of fans engaged depends on the FPr parameter
If the P3 or P4 probes are used for dynamic set point
The function is disabled and only the standard set point is used.

Emerson Dixell XC645D Specifications

General

Brand	Emerson
Model	Dixell XC645D
Category	Controller
Language	English