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5 SERIES 506A11 OUTDOOR PACKAGED HEAT PUMP INSTALLATION MANUAL
Special Modes and Applications
Communicating Digital Thermostats
The Aurora controls system also features either mono-
chromatic or color touch screen graphic display thermostats
for user interface. These displays not only feature easy to use
graphical interface but display alerts and faults in plain English.
Many of the features discussed here may not be applicable
without these thermostats.
Dehumidification – Passive
In passive dehumidification mode with a Variable Speed
ECM motor the airflow is reduced by 15% from the heating
airflow setting. If cooling airflow is set to +5, -5 or -10% of
heating airflow it will automatically be set to -15% of heating
airflow whenever the dehumidification call is present in the
communicating stat or from the thermostat input DH. If the
airflow for cooling is already set to -15% no airflow change will
be noticed from normal cooling. Dehumidification mode will be
shown on the ABC and the communicating thermostats.
Aurora ‘Advanced’ Control LED Displays
These three LEDs display the status, configuration, and fault
codes for the control. These can also be read in plain English
via the Aurora AID Tool.
Status LED (LED3, Green)
Description of Operation
Fault LED, Green
Normal Mode
ON
Control is Non-functional
OFF
Test Mode
Slow Flash
Lockout Active
Fast Flash
Dehumidification Mode
Flash Code 2
Load Shed
Flash Code 5
Emergency Shutdown
Flash Code 6
On Peak Mode
Flash Code 7
(Future Use)
Flash Code 8
(Future Use)
Flach Code 9
Configuration LED (LED2, Yellow)
Description of Operation
Configuration LED, Yellow
No Software Overwritten
ECM Setting
DIP Switch Overwritten
Slow Flash
ECM Configuration Mode
Fast Flash
Reset Configuration Mode
OFF
Fault LED (LED1, Red)
Red Fault LED
LED Flash
Code *
Lockout
Reset/ Remove
Fault Condition Summary
ABC Basic F
aults
Normal - No Faults
Off
-
Fault-Input
1
No
Auto
Tstat input error. Autoreset upon condition removal.
Fault-High Pressure
2
Yes
Hard or Soft
HP switch has tripped (>600 psi)
Fault-Low Pressure
3
Yes
Hard or Soft
Low Pressure Switch has tripped (<40 psi for 30 continuous sec.)
Fault-Freeze Detection FP2
4
Yes
Hard or Soft
Freeze protection sensor has tripped (<15 or 30 degF for 30 continuous sec.)
Fault-Freeze Detection FP1
5
Yes
Hard or Soft
Freeze protection sensor has tripped (<15 or 30 degF for 30 continuous sec.)
Fault-Condensate Overflow
7
Yes
Hard or Soft
Condensate switch has shown continuity for 30 continuous sec.
Fault-Over/Under Voltage
8
No
Auto
Instantaneous voltage is out of range. **Controls shut down until resolved.
Fault-FP1 Sensor Error
11
Yes
Hard or Soft
FP1 Sensor Open or Shorted
ABC & A
XB A
d
v
anc
ed
Fault-Compressor Monitor
10
Yes
Hard or Soft
Open Crkt, Run, Start or welded cont
Non-CriticAXB SnsrErr
13
No
Auto
Any Other Sensor Error
CriticAXBSnsrErr
14
Yes
Hard or Soft
Sensor Error for EEV or HW
Alert-HotWtr
15
No
Auto
HW over limit or logic lockout. HW pump deactivated.
Fault-VarSpdPump
16
No
Auto
Alert is read from PWM feedback.
Non-CritComErr
18
No
Auto
Any non-critical com error
Fault-CritComErr
19
No
Auto
Any critical com error. Auto reset upon condition removal
Alarm - Low Loop Pressure
21
No
Auto
Loop pressure is below 3 psi for more than 3 minutes
Alarm - Home Automation 1
23
No
Auto
Closed contact input is present on Dig 2 input - Text is configurable
Alarm - Home Automation 2
24
No
Auto
Closed contact input is present on Dig 3 input - Text is configurable
NOTES:
*All codes >11 use long flash for tens digit and short flash for the ones digit. 20, 30, 40, 50 etc. are skipped!
Alert’ is a noncritical sensor or function that has failed. Normal operation of the heat pump is maintained but service is desired at some point.
The Aurora ‘Advanced’ Control System cont.
