Appendix A:  RTU Open Points/Properties in i-Vu®/Field Assistant   
 
 
 
 
RTU Open v3    CARRIER CORPORATION ©2019  
Installation and Start-up Guide    All rights reserved 
  78 
 
Alarms Displayed on ZS or SPT Sensor
 
You can individually select items below to show the alarm indicator on the ZS or SPT 
sensor. 
 
 – If set to display, shows the Maintenance or Fault indicator on the 
communicating zone sensors with display, if a valid space temperature sensor to sensor 
value is not available to the controller.
 
D: 
R: 
Ignore 
Ignore/Display 
 – If set to display, shows the Maintenance or Fault indicator on 
the communicating zone sensors with display, if filter runtime exceeds the value of the 
Filter Service Alarm Timer
 or in response to a filter status switch binary input. 
D: 
R: 
Display 
Ignore/Display 
Airside Linkage Status Alarm
 – If set to display, shows the Maintenance or Fault 
indicator on the communicating zone sensors with display, if Linkage has failed in a 
zoned system using Linkage.
 
D: 
R: 
Ignore 
Ignore/Display 
Misconfiguration - Switch/Analog Inputs
 – If set to display, shows the Maintenance or 
Fault indicator on the communicating zone sensors with display. Indicates if a duplicate 
configuration exists for two or more binary input (3, 5, 8, or 9) functions, OR if a 
duplicate configuration exists at the analog Input 1 and 2 functions.
 
D: 
R: 
Ignore 
Ignore/Display 
Compressor 1 Runtime Alarm
 – If set to display, shows the Maintenance or Fault 
indicator on the communicating zone sensors with display, if the 
 
exceeds the value of the 
Compressor 1 Service Alarm Timer
. 
D: 
R: 
Ignore 
Ignore/Display 
Compressor 2 Runtime Alarm
 – If set to display, shows the Maintenance or Fault 
indicator on the communicating zone sensors with display, if the 
 exceeds the value of the 
Compressor 2 Service Alarm Timer
. 
D: 
R: 
Ignore 
Ignore/Display 
 – If set to display, shows the Maintenance or Fault indicator on 
the communicating zone sensors with display, if the supply fan is operating when 
commanded off.
 
D: 
R: 
Ignore 
Ignore/Display 
 – If set to display, shows the Maintenance or Fault indicator 
on the communicating zone sensors with display, if the supply fan runtime exceeds the 
value of the
 Supply Fan Service Alarm Timer
. 
D: 
R: 
Ignore 
Ignore/Display 
 
 
 
 
Properties > Control Program > Configuration > Service Configuration 
 
 
 
 
 – The type of equipment that the RTU Open is controlling. 
Options: 
 – Standard rooftop air handling unit. 
™
– A special factory-supplied 3-stage cooling unit 
 – Heat Pump application, uses reversing valve output to control heating 
and cooling. 
 – Carrier Heat Pump application only. 
D: 
R: 
Heat/Cool 
Heat/Cool 
LC WeatherExpert™ 
HP O/B Ctrl 
HP Y1/W1 Ctrl