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Pressure Independent Variable Air Volume ( Single Duct)
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Symptom
Possible Cause
Correction
VAV does not closing
and / or opening
Frame is racked causing blades to
bind on frames
Adjust frame such that it is square and
plumb
Actuator linkage loose
Close damper, disconnect power, adjust
and tightening linkage
Loose in wire connection
Close damper, disconnect power, adjust
and tightening linkage
Defective motor
Replace the motor (Actuator)
Foreign screw in VAV linkage
Check VAV Linkages
Contaminants on VAV
Cleanwith a non-oil based solvent
Improper Thermostat
response
Defective Thermostat
Replace the Thermostat
Loose Wire Connection
Disconnect the power connection and
check the wiring connections
VAV does not work
No power supplied to the Actuator
Add power supply to the device
Reheating coil does
not work (optional
fittings)
TRD Heated
Reset Manually
Loose Wire Connection
Disconnect the power and check the
wiring connections
Trouble shooting
The following is a possible cause and correction list for common concerns with the
Variable Air Volumes.
Trouble Shooting