Trane Tracer VV550 User Manual

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

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English