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Table 6. The overview screens
Primary Overview Module Screen
Primary and Secondary Overview Circuit Screen
Overview Module
Module En/Dis
Pressing this button enables or disables a module. If
module is disabled, it is excluded from primary control
compressors sequence. Not accessible for 'user'.
Module Status
Possible options:
•
Module ON – Module is ready to run.
•
OFF by DI – Module is off by opened state of PLC DI1.
•
OFF by Switch – Module is off by Module En/Dis
button.
•
OFF by Alarm – Module is locked out by one of the
major alarms.
•
OFF by Primary – Module is switching between control
states Primary/Secondary/Stand-alone.
•
OFF by System – Module is off by one of the System
Off conditions.
•
OFF by switching to Cooling – Module is switching over
to Cooling Mode.
•
OFF by switching to Heating – Module is switching over
to Heating Mode.
•
Defrost Cycle – Module is running Defrost Cycle.
ARTC-SVX009A-EN
Secondary Overview Module Screen
•
OFF by switching Mode – Module is off and is going
through a change of a major parameter. For instance,
Number of Refrigeration Circuits, Number of Fan Banks
etc.
•
OFF by Low Ambient – Module is off by Low Ambient
Temperature.
•
Refrigeration Evacuation Cycle – Module is running
Refrigeration Evacuation Cycle.
Module Cntrl Status
Possible options:
•
Primary – Module acts as a primary module. Primary
module performs temperature control for either heating
or cooling loads. It also acts as a Supervisor when
communicating with secondary modules and defines
how many modules need to run its compressors in
order to satisfy heating or cooling controlled
temperatures.
•
Secondary – Module acts as a secondary module.
Conditions for the module to be a secondary module:
–
Its PLC has been assigned IP address from
secondaries addresses range.
–
It is communicating with primary module.
Operating Procedures
35
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