Geostar ASTON SERIES Installation Manual page 22

ASTON INDOOR SPLIT SERIES INSTALLATION MANUAL
The Aurora Control System cont.
Aurora 'Base' Control
NOTE: Refer to the Aurora Base Control Application and
Troubleshooting Guide and the Instruction Guide: Aurora Interface and
Diagnostics (AID) Tool for additional information.
Control Features
Software ABC Standard Version 2.0
Single or Dual Capacity Compressors
Either single or dual capacity compressors can be operated.
Other Control Features
• Random start at power up
• Anti-short cycle protection
• High and low pressure cutouts
• Loss of charge
• Water coil freeze detection
• Over/under voltage protection
• Load shed
• Emergency shutdown
• Hot gas reheat operation (where applicable)
• Diagnostic LED
• Test mode push button switch
• Two auxiliary electric heat outputs
• Alarm output
• Accessory output with N.O. and N.C.
• Modbus communication (master)
• Modbus communication (slave)
Field Selectable Options via Hardware
DIP Switch (SW1)
– Test/Configuration Button (See SW1
Operation Table)
Test Mode
The control is placed in the test mode by holding the push button
switch SW1 for 2 - 5 seconds. In test mode most of the control
timings will be shortened by a factor of sixteen (16). LED3 (green)
will flash at 1 second on and 1 second off. Additionally, when
entering test mode LED1 (red) will flash the last lockout one
time. Test mode will automatically time out after 30 minutes. Test
mode can be exited by pressing and holding the SW1 button for
2 to 5 seconds or by cycling the power. NOTE: Test mode will
automatically be exited after 30 minutes.
Reset Configuration Mode
The control is placed in reset configuration mode by holding the
push button switch SW1 for 50 to 60 seconds. This will reset
all configuration settings and the EEPROM back to the factory
default settings. LED3 (green) will turn off when entering reset
configuration mode. Once LED3 (green) turns off, release SW1
and the control will reset.
DIP Switch (SW2)
SW2-1 FP1 Selection – Low water coil temperature limit setting
for freeze detection. On = 30°F; Off = 15°F.
SW2-2 FP2 Selection – On = 30°F; Off = N/A
SW2-3 RV – O/B - thermostat type. Heat pump thermostats
with "O" output in cooling or "B" output in Heating can be
selected. On = O; Off = B.
SW2-4 Access Relay Operation (P2)
and 2-5
Access Relay Operation
Cycle with Blower
Cycle with Compressor
Water Valve Slow Opening
Cycle with Comm. T-stat Hum Cmd
Cycle with Blower - The accessory relay will cycle with the
blower output.
Cycle with Compressor - The accessory relay will cycle with the
compressor output.
Water Valve Slow Opening - The accessory relay will cycle and
delay both the blower and compressor output for 90 seconds.
SW2-6 CC Operation – selection of single or dual capacity
compressor. On = Single Stage; Off = Dual Capacity
SW2-7 Lockout and Alarm Outputs (P2) – selection of a
continuous or pulsed output for both the LO and ALM
Outputs. On = Continuous; Off = Pulsed
SW2-8 Future Use
Alarm Jumper Clip Selection
From the factory, ALM is connected to 24 VAC via JW2. By cutting
JW2, ALM becomes a dry contact connected to ALG.
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SW2-4 SW2-5
ON ON
OFF OFF
ON OFF
OFF ON