Programming Guide

VAV-SVP01A-EN 95
Troubleshooting
• If sensor and receiver still do not operate properly, replace bad components. If unit passes
tests, check VV550 operation.
4. Defective VAV VV550
• Disconnect the receiver sensor wires on the VAV VV550 on terminals TB3-1 and TB3-2 and
measure the VDC. It should be 5VDC. If 5VDC is not present check incoming power to the VAV
VV550 Controller board on TB1-1 and TB1-2. Should measure 24VAC ± 10%. If you measure
the proper voltage at TB1-1 and TB1-2 and no voltage at TB3-1and TB3-2 replace VV550.
Note: If no voltage at TB1-1 and TB1-2, see VV550 failure procedures
• Disconnect the receiver sepoint wires on the VAV VV550 on terminals TB3-2 and TB3-3 and
measure the VDC. It should be 5VDC. If 5VDC is not present check incoming power to the VAV
VV550 Controller board on TB1-1 and TB1-2. Should measure 24VAC ± 10%. If you measure
the proper voltage at TB1-1 and TB1-2 and no voltage at TB3-2and TB3-3 replace VV550.
Table 26. Signal quality: LED1, LED2, LED3 on the sensor
User Action LED Display Indicates…
None LED1:Off
LED2:Off
LED3:Off
Normal state
* No Test button press
Press Test
Button (SS)
LED1:Off
LED2:Off
LED3:Off
Associated; no communication with receiver
* Associated, but no signal from the receiver after
pressing Test button
LED1:On
LED2:On
LED3:On
Displays for 5 seconds, then constantly off
Excellence signal quality
* Adequate signal margin for reliable communication.
LED1:Off
LED2:On
LED3:On
Displays for 5 seconds, then constantly off
Marginal signal quality
* Reduced battery life is likely.
* Consider moving the sensor or receiver to a better
location.
LED1:Off
LED2:Off
LED3:On
Displays for 5 seconds, then constantly off
Poor signal quality
* Unreliable communication.
* Strongly recommend moving the sensor or receiver to
a better location.
Table 27. Signal quality: LED1, LED2, LED3 on the receiver
User Action LED Display Indicates…
None
LED1:Off
LED2:Off
LED3:Off
Normal state
* No Test button press
Press Test
Button (SS)
LED1:On
LED2:On
LED3:On
Displays for 5 seconds, then constantly off
Excellence signal quality
* Adequate signal margin for reliable communication.
LED1:Off
LED2:On
LED3:On
Displays for 5 seconds, then constantly off
Marginal signal quality
* Reduced battery life is likely.
* Consider moving the sensor or receiver to a better
location.
LED1:Off
LED2:Off
LED3:On
Displays for 5 seconds, then constantly off
Poor signal quality
* Unreliable communication.
* Strongly recommend moving the sensor or receiver to
a better location.