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AFFINITY DUAL CAPACITY HYDRONIC INSTALLATION MANUAL
The Aurora Base Control System cont.
Aurora ‘Advanced’ Control Features
The Aurora ‘Advanced’
Control system expands on
the capability of the Aurora
‘Base’ Control (ABC)
by adding the Aurora
Expansion Board (AXB).
All of the preceding
features of the Aurora
‘Base’ Control are included.
The following control
description is of the
additional features and
capability of the Aurora
advanced control.
It is highly recommended the
installing/servicing contractor obtain
an Aurora Interface and Diagnostic
Tool (AID) and specialized training
before attempting to install or service
an Aurora ‘Advanced’ control system.
The additional AXB features include the following:
AXB DIP Switch
DIP 1 - ID
: This is the AXB ModBus ID and should always
read On.
DIP 2 & 3 - Future Use
DIP 4 & 5 - Accessory Relay2
: A second, DIP configurable,
accessory relay is provided that can be cycled with the
compressor 1 or 2 , blower, or the Dehumidifier (DH)
input. This is to complement the Accessory 1 Relay on
the ABC board.
Position
DIP 4
DIP 5
Description
1
ON
ON
Cycles with Fan or ECM (or G)
2
OFF
ON
Cycles with CC1 first stage of compressor
or compressor spd 6
3
ON
OFF
Cycles with CC2 second stage of
compressor or compressor spd 7-12
4
OFF
OFF
Cycles with DH input from ABC board
Compressor Monitoring
The AXB includes two current transducers to monitor the
compressor current and starting characteristics. Open
circuits or welded contactor faults will be detected. A fault
will produce an E10 code.
Advanced Communication Ports
Communication ports P6 and P8 will provide future
expansion via dedicated protocols. These are for future use.
