RT-SVX34C-EN 135
Diagnostics
VAV U nit s
If the RTRM loses input from the building management system, the RTRM will control in the default
mode after approximately 15 minutes. For VAV units, a "shorted" mode input is the only input
required for the "Default Mode" to operate. If the RTRM loses setpoint inputs from the RTAM due
to remote setpoint input failure, the RTRM will use default setpoint inputs as defined in the default
chart for VAV units.
Economizer Actuator (ECA) Test Procedures
Verify Economizer Status by Economizer Actuator (ECA)
LED indicator:
OFF: No Power or Failure
ON: Normal, OK to Economize
Slow Flash: Normal, Not OK to Economize
Fast Flash: ¼ Second ON/2 Seconds OFF Communications Failure
1 Flash: Actuator Fault
2 Flashes: CO2 Sensor out of range
3 Flashes: RA Humidity Sensor out of range
4 Flashes: RA Temp Sensor out of range
Table 75. Constant Volume Defaults
Component or Function Default Operation
Cooling Setpoint (CSP) 74° F
Heating Setpoint (HSP) Economizer 71° F Normal Operation
Economizer Minimum Position Normal Operation
Mode Normal operation, or auto if ZSM mode switch has failed
Fan Normal operation, or continuous if fan mode switch on ZSM has failed
Night Setback Mode Disabled - Used with Integrated Comfort™ System and Programmable ZSM’s only
Supply Air Tempering Disabled - Used with Integrated Comfort™ Systems only
Table 76. Variable Air Volume Defaults
Component or Function Default Operation
Supply Air Cooling Setpoint Failure 55° F
Supply Air Reset Setpoint Failure Disable Reset
Supply Air Reset Amount Disable Reset
Supply Air Static
Setpoint Failure 0.5 IWC
Supply Air Static
Deadband Failure 0.5 IWC
Morning Warm-Up
Setpoint Failure Disable MWU and DWU
Mode Failure "Open "Unit Mode "Off"
Mode Failure "Shorted "Unit Mode "Auto"
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