Emerson EC2-XC645CX User Manual

OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX 39/54
ADDITIONAL FUNCTIONS
19.1 Compressor running proof function
The digital inputs are normally used to signal a compressor or fan failure.
It’s also possible to set the digital inputs for running proof signalling. That means when
compressor relay is activated, after a configurable delay the digital input related to the compressor
should goes on too (usually a contact from compressor contactor) and the controller has the
“confirmation” that compressor is running.
If it does not, that means something is wrong between the controller and the compressor itself.
Parameters and settings
The parameters involved are:
- iF01, iF02, iF03, iF04, iF05, iF06, iF07: configuration of dig input 1, 2, 3, 4, 5, 6, 7,
with the related polarity:
- iP01, iP02, iP03, iP04, iP05, iP06, iP07: polarity of digital input 1, 2, 3, 4, 5, 6, 7,
with the related delay before alarm signalling:
- d1d, d2d, d3d, d4d, d5d, d6d: delay before signalling alarm with digital input set
respectively as oA1 or Co1, oA2 or Co2, oA3 or Co3, oA4 or Co4, oA5 or Co5, oA6
or Co6.
Alarms related
CODE MEANING CAUSE ACTION RESET
FC01…
FC06
Running proof
alarm with
automatic
recover
The digital input set
as Co1 - Co6 has
not been activated
by d1d - d46 time
The compressor
1 - 6 is switched off
and the safety
timers start
Automatic – when safety
timers are over
LC01…
LC06
Running proof
alarm with
manual recover
5 running proof
alarms happened in
an hour.
The compressor
1 - 4 is switched off
Manual by means:
- Controller off-on
- Reset by keyboard
- Reset by monitoring system
Example
EI: Rack with 2 compressors, with compressor safeties and running proof circuit for each
compressor:
Compressor 1 on relay 1: oA1 = CPr1
Compressor 2 on relay 2: oA2 = CPr1
Safety for compressor 1 on digital input 1: iF01 = oA1
Safety for compressor 2 on digital input 2: iF02 = oA2
Running proof circuit for compressor 1 on digital input 3: iF03 = Co1
Running proof circuit for compressor 2 on digital input 4: iF04 = Co2
2 seconds delay before signalling alarm and stopping the compressor 1: d1d = 2
2 seconds delay before signalling alarm and stopping the compressor 2: d2d = 2
When the compressor 1 (or 2) starts, if by 2 seconds the digital input 3 (or 4) is not activated
(running proof function) the FC01 alarm is signalled, and the compressor is stopped.
Alarm recovers as soon as the safety timers of the compressor (onon, ofon) are over, and
compressor come back available for regulation.
After 5 consecutive alarms, the alarms move from automatic restart to manual restart and it must
be reset by Keyboard, of by switching off and on the controller.

Emerson EC2-XC645CX Specifications

General

Brand	Emerson
Model	EC2-XC645CX
Category	Controller
Language	English