Installation and Maintenance Manual

Diagnostics
UNT-SVX07D-EN 11 7
Troubleshooting (Wireless
Controls)
Locations of LEDs, Test button, Test Symbols,
and Error Codes
The receiver for all models has four LEDs: LED1, LED2,
LED3, and LED5. Figure 42 shows their locations.
Note: To view LEDs on a flush mount receiver on a fan-
coil unit, the front panel of the unit must be
removed.
The sensor for model WZS have four LEDs: LED1, LED2,
LED3, and LED5. The sensor for model WDS has test
symbols and error codes that appear on the display. All
three sensor models have a Test button. Figure 43 shows
their locations.
Diagnostics (Wireless Controls)
LED1, LED2, and LED3, located on the sensor of model
WZS respond to diagnostics by exhibiting specific blinking
patterns. View their response by pressing the Test button
(see Table 45, p. 118).
Figure 42. LED locations on the receiver
LED1
LED2
LED3
LED5
Figure 43. LED, Test button, and symbol locations on
the sensor
LED1
LED2
LED3
LED5
Test button
WZS sensor
.
Test symbols
Error code
Test button
WDS sensor
UNT-SVX07_-EN.book Page 117 Friday, April 27, 2012 9:40 AM