Trane Tracer VV550 User Manual

86 CNT-SVX17G-EN
Troubleshooting
Diagnostic present
A specific list of controller diagnostics affects valve operation. For more information on controller
diagnostics, refer to Ta bl e 50, p. 81. Freeze protection for a ventilation flow control unit opens the water
v
a
lve or valves.
Unit configuration
The controller must be properly configured based on the actual installed end devices and application. When
the un
it configuration does not match the actual end devices, the valves may not work correctly.
Unit wiring
The wiring between the controller outputs and the valve(s) must be present and correct for normal valve
oper
ation.
Actuator failure Device failed or setscrew loosened.
Water valve override Control of the water valve is overridden by the communicated valve override.
Flow override Control of the air valve is overridden by the
communicated flow override
Table 59. Air valve and/or water valve stay closed
Probable cause Explanation
Requested mode Off
You can communicate a desired operating mode (such as Off, heat, and cool) to the controller. When Off
is communi
cated to the controller, the unit controls the fan Off. There is no heating or cooling (valves are
closed).
Power-up control wait
When power-up control wait is enabled (non-zero time), the controller remains Off (calibration occurs during
po
wer-up control wait if auto-calibration is enabled) until one of two conditions occurs:
• The controller exits power-up control wait once it receives communicated information.
• The controller exits power-up control wait once the power-up control wait time expires.
Manual output test
The controller includes a manual output test function you can use to verify output operation and associated
outpu
t wiring. However, based on the current step in the test sequence, the valve(s) may not be open. For
more information on these sections, refer to “Manual Output Test,” p. 80 and
“
Manual Output Test,” p. 28.
Diagnostic present
A specific list of diagnostics affects valve operation. Fo
r more information on controller diagnostics, refer
to Tab l e 50, p. 81.
Unit configuration
The controller must be properly configured based on the actual installed end devices and application. When
the un
it configuration does not match the actual end devices, the valves may not work correctly.
Unit wiring
The wiring between the controller outputs and the valve(s) must be present and correct for normal valve
oper
ation.
Actuator failure Device failed or setscrew loosened.
Valve override Water valve is overridden by the communicated valve override.
Flow override Control of the air valve is overridden by the
communicated flow override.
Table 58. Air valve and/or water valve stay open (continued)
Probable cause Explanation

Trane Tracer VV550 Specifications

General

Brand	Trane
Model	Tracer VV550
Category	Controller
Language	English