Diagnostics - Trane Tracer VV550 Installation, Operation And Maintenance Manual

Diagnostics

Table 50
Table 50. Controller diagnostics
Diagnostic
Invalid unit configuration
b
Controller failure
Discharge air temperature failure (space
temperature control)
Discharge air temperature failure
(ventilation flow control without reheat)
Discharge air temperature failure
(ventilation flow control with reheat)
Discharge air temperature failure (flow
tracking control)
Low airflow (space temperature control)
Low airflow (ventilation flow control)
Primary air temperature failure (space
temperature control)
Primary air temperature failure
(ventilation flow control)
Primary air temperature failure (flow
tracking control)
Space temperature fail (space
temperature control)
a
Space temperature fail (ventilation flow
control)
a
Space temperature fail (flow tracking
control)
a
Local setpoint failure
Flow sensor failure or flow sensor
calibration failure (space temperature
control
Flow sensor failure or flow sensor
calibration failure (ventilation flow
control)
Flow sensor failure or flow sensor
calibration failure (flow tracking control)
Freeze protection active
(ventilation flow control)
Thumbwheel in */** position (single
star position)
Thumbwheel in */** position (double
star position)
CNT-SVX17G-EN
®
shows the Tracer VV550/551 controller diagnostics.
Air valve
0 VDC
Closed
Normal
Normal
Closed
Normal
Normal
Normal
Normal
Normal
Normal
Occupied: cool minimum flow
setpoint
Unoccupied: closed
Normal
Normal
Normal
Normal pressure dependent
control
Normal pressure dependent
control
If the configured airflow
tracking offset is positive,
configure maximum airflow
If the configured airflow
tracking offset is negative,
configure minimum airflow
Closed
Minimum airflow
Maximum airflow
Fan
0 VDC
Off
Normal
Do not care
Do not care
Do not care
Normal
Do not care
Normal
Do not care
Do not care
Series fan enabled; parallel
fan Off
Do not care
Do not care
Normal
Normal
Do not care
Do not care
Off
Normal
Normal
Troubleshooting
Reheat
0 VDC
Off
Normal
Do not care
Off
Do not care
Local electric heat is Off; local
hydronic and all remote heat
is normal
Local electric heat is Off; local
hydronic is normal; remote is
Don't care
Local electric heat is 
Off ; local hydronic and all
c
remote heat is normal
Normal
Do not care
Off
Normal
Do not care
Normal
Normal
Normal
Do not care
Off
Normal
Normal
81