Armstrong 3750 - System Communication and Service Alarms

installation &
operating instructions
3750 Pulpress
Pressurisation unit
18
23.11 offline alarm _ cpcoe
The oine alarm(s) would be activated if the expansion
modules loses the communication to the main controller
c.pco. mini.
functions
• Activates Device oine and Common Alarm on display
• Activates Common Alarm contact (G)
note
This is a major alarm. This would cause all the contacts on
the Expansion modules including Boiler interlock(s) to stop
working. It will not stop the unit from pumping but would
require an immediate action.
All the VFCs are NO contacts except for the Boiler Interlocks
which have both NO and NC contacts. To achieve the open
contact in the case of power loss a signal of
10V is provided
to the Boiler Interlock contacts in healthy condition and
0V
in the case of low pressure, high pressure or power failure
alarms, see table 1.
table 1
type of contact
(on j12)
healthy status alarm status
NC6 (Exp.1) open close
NO6 (Exp.1) close open
NC6 (Exp.2) open close
NC6 (Exp.
2) close open
See the wiring diagram for other volt-free contacts.
service reminder
The service reminder warning is displayed ten months after
being activated.
functions
• Activates Ser on display
note
This is not an alarm and does not indicate a system or unit
fault, but will continue to be displayed until the unit receives
a service from an Armstrong Service Engineer or a registered
Armstrong Service provider.
Call Armstrong service to arrange service Visit.