Metacentre DX Box
Page 5
Compressor Status:
Compressor
Running
Compressor On Load
Flashing - Not Responding, Compressor
Not Running When required to load.
Service Maintenance function active
Pressure Limit Exceeded
1: Compressor Alarm
2: Auxiliary Alarm input active
3: Pressure Sensor fault (display “- - - -
“)
1: Compressor Not Available
2: Auxiliary Trip input active
2.2 Indicators
Run Indicator (Green LED)
OFF
DX Box Fault condition
ON
Active
Fault Indicator (Red LED)
OFF – No fault
Slow
Flash:
1: Compressor Alarm
2: Pressure Sensor fault (display “- - - -
“)
Fast
Flash:
1: Compressor Not Available
2.3 Compressor
Identification
Each compressor connected to the DX Box
will have an assigned compressor
identification number #1 or #2.
1
2
#1
DX Box
3
#2
The DX Box ‘group’ will also have a single
unique system address identification and will
be represented on the system management
unit as a single entity using the ‘address’
identification number. The identification
number will be unique for the system.
For example, “C.03.1” indicates that the
compressor is connected to the DX Box as
compressor #1 and the DX Box is represented
on the system management unit as
compressor number “03”.
2.4 Operation
The DX Box is always active (started) and
cannot be stopped. The DX Box will
automatically switch between ‘Remote’, when
under system management unit control, or
‘Local’ mode.
2.5 Power Failure Auto-Restart
The DX Box will always automatically start
when power is re-applied after a power supply
disruption or failure.
2.6 Failure
Modes
If communications with the system
management unit is disrupted, the DX Box will
switch to ‘Local’ mode and pressure regulation
control is maintained using the set pressure
set points.
The DX Box will automatically switch back to
‘Remote’ mode when communications with the
system management unit are re-established,
or the DX Box fault is reset.
If a fault occurs with the DX Box, or power to
the DX Box is disrupted, pressure regulation
control is automatically transferred back to
each compressor. The compressor(s) will
continue to operate using the pressure
settings programmed or set in the individual
compressor controller(s).
The design of some air compressor control
systems may inhibit automatic transfer of
pressure regulation control to local operation
mode. In this instance the compressor will not
continue production of compressed air –
consult the air compressor manual or your air
compressor supplier / specialist for details
before installing the DX Box unit.
2.7 Compressor
Fault
If a compressor fault condition is detected the
‘status’ display will show an ‘Alarm’ condition.
The ‘status’ display associated with the
compressor will also indicate a fault condition
(see Status Symbols). The DX Box ‘Fault’
indicator (10) will flash to attract attention.
Compressor fault conditions will also be
communicated to the system management unit
controller.
