Johnson Controls RC Series Engineering Manual page 16

RC SERIES ENGINEERING GUIDE
Controls - cont.
Special Modes and Applications
5-Speed ECM Blower Motor
Normally the 5-Speed ECM motor can be driven off
of thermostat signals and the ABC connector P9.
Communicating thermostats, however present a special
problem in this application since they operate without 24
VAC thermostat signals. The ABC board is wired to operate
these systems from the alternate relay output signals CC1,
CC2, Fan, and EH1 and should be wired for this.
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, 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.
Fault LED (LED1, Red)
Red Fault LED
Normal - No Faults
Fault-Input
Fault-High Pressure
Fault-Low Pressure
Fault-Freeze Detection FP2
Fault-Freeze Detection FP1
Fault-Condensate Overflow
Fault-Over/Under Voltage
Fault-FP1 Snsr Error
Fault-Compressor Monitor
Non-CriticAXBSnsrErr
CriticAXBSnsrErr
Alert-HotWtr
Fault-VarSpdPump
Not Used
Non-CritComErr
Fault-CritComErr
Alarm - Low Loop Pressure
Alarm - Home Automation 1
Alarm - Home Automation 2
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.
LED Flash Reset/
Lockout
Code * Remove
Off -
1 No Auto
2 Yes Hard or Soft
3 Yes Hard or Soft
4 Yes Hard or Soft
5 Yes Hard or Soft
7 Yes Hard or Soft
8 No Auto
11 Yes Hard or Soft
10 Yes Hard or Soft
13 No Auto
14 Yes Hard or Soft
15 No Auto
16 No Auto
17 No Auto
18 No Auto
19 No Auto
21 No Auto
23 No Auto
24 No Auto
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
Normal Mode
Control is Non-functional
Test Mode
Lockout Active
Dehumidification Mode
Load Shed
Emergency Shutdown
On Peak Mode
(Future Use)
(Future Use)
Configuration LED (LED2, Yellow)
Description of Operation
No Software Overwritten
DIP Switch Overwritten
ECM Configuration Mode
Reset Configuration Mode
Fault Condition Summary
Tstat input error. Autoreset upon condition removal.
HP switch has tripped (>600 psi)
Low Pressure Switch has tripped (<40 psi for 30 continuous sec.)
Freeze protection sensor has tripped (<15 or 30 degF for 30 continuous sec.)
Freeze protection sensor has tripped (<15 or 30 degF for 30 continuous sec.)
Condensate switch has shown continuity for 30 continuous sec.
Instantaneous voltage is out of range. **Controls shut down until resolved.
If FP1 Sensor Error
Open Crkt, Run, Start or welded cont
Any Other Sensor Error
Sensor Error for EEV or HW
HW over limit or logic lockout. HW pump deactivated.
Alert is read from PWM feedback.
IZ2 Com Fault. Autoreset upon condition removal.
Any non-critical com error
Any critical com error. Auto reset upon condition removal
Loop pressure is below 3 psi for more than 3 minutes
Closed contact input is present on Dig 2 input - Text is configurable
Closed contact input is present on Dig 3 input - Text is configurable
16
Fault LED, Green
ON
OFF
Slow Flash
Fast Flash
Flash Code 2
Flash Code 5
Flash Code 6
Flash Code 7
Flash Code 8
Flach Code 9
Configuration LED, Yellow
ECM Setting
Slow Flash
Fast Flash
OFF