UNT-SVX07B-EN 121
Diagnostics
Sensor/Receiver Compatibility
Version 1.5 (p/n X13790854 and X13790855) and higher receivers are compatible with all sensors
models and support all functions. Receivers released prior to version 1.5 are compatible with only
model WTS.
Replacing a Failed Sensor or Receiver
Note: Receivers ship installed on the unit. To remove the receiver, press in the retention tabs on
the underside of the receiver enclosure (see Figure 18, p. 68) and push upward.
To replace a failed sensor or receiver:
11. Confirm that the device is disassociated (see Ta b le 38 and Ta ble 39, p. 11 7 ).
12. Set the rotary address switch of the new device
to match the address of the remaining sensor
or receiver.
Note: The
re is no need to remove power from the remaining device.
13. Apply power to the n
ew device. Association between the new and the remaining devices will
automatically occur.
Note: When re
placing a WDS sensor, the receiver (version 1.5 or higher) will automatically
configure the sensor to match the last stored configuration, if the sensor has not been
placed into configuration mode and the factory default configuration is still valid. If the
sensor configuration does not match the desired system features, it can be manually
configured (see “Manual Association,” p. 120).
Servicing and Testing
If the wireless sensor system is not working as expected, use the tools and procedure described
in this section.
Servicing and Testing Tools
No special tools or software are necessary to service and test the wireless sensor system. Test the
system by using:
• The LEDs on the receiver, LEDs on the model
WTS sensor, and the display on the model WDS
sensor
• The Test button on the sensor
• The address test mode on the receiver
•A common volt-ohm meter
Procedure for Testing the Wireless Sensor System
If the wireless sensor system is not working as expected:
1. Observe LED5 on the receiver. LED5 is On solid green whenever the receiver is powered.
2. Verify that the receiver is properly grounded.
Both the GND-SIGNAL (black) wire and the GND-
POWER (yellow) wire must be grounded.
3. Press the Test button on the sensor.
• Mo
del WTS: LED5 should turn On solid green, indicating proper battery strength. LED1,
LED2, and LED3 will indicate signal strength.
Note: When checking signal strength, both LED1 and LED3 on the receiver and sensor
illuminate in unison if the sensor and receiver are associated. Use this feature to
confirm association.
• Model WDS: Battery life (“Testing Battery Status,” p. 118) and signal strength (“Testing
Signal Strength,” p. 117) are indicated on the display.
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