UNT-SVX07B-EN 119
Diagnostics
24 V Power Status Indicator
LED5 on the receiver of all models (Figure 30, p. 115) lights and stays constantly On when 24 V
power is normal.
Using the Wireless Sensor System to Check Signal Strength on a Site
Follow these steps to check the signal strength on a site:
1. Power up a receiver with a 24 V transformer (user supplied)
2. Associate the sensor to a receiver of the same model intended for the job
3. Place the receiver at the desired location
4. Place or hold the sensor at the desired location
5. Press the Test button (S5) on the sensor and obser
ve the signal strength as indicated by LED1,
LED2, and LED3 on model WTS, and on the display on model WDS (Figure 31, p. 116 ).
For more information on interpreting the
LEDs and the display symbols that indicate signal
strength, see “Testing Signal Strength,” p. 117.
Replacing Sensor Batteries
Sensor battery type, length of life, and installation are addressed in this section.
Battery Type
NOTICE
Equipment Damage!
The batteries are manufactured in a ready-to-use state. They are not designed for recharging.
Recharging can cause battery leakage or, in some cases, can cause the safety release vent to
open.
NOTICE
Equipment Damage!
Do not attempt to hook up the sensor to a power supply. Equipment damage may result.
Use two non-rechargeable 1.5 V lithium AA batteries in the sensor. To maintain UL rating, use only
UL-listed lithium batteries. The sensor ships with Energizer™ L91 batteries already installed.
Replacement batteries are available at Trane Service Parts Centers (p/n X13770035010) or other
local suppliers.
Battery Life
Battery life is five years under normal conditions. If the sensor is not used for an extended period
of time, do one of the following:
• Set the sensor address to 000
to place the sensor into a low-power hibernation mode.
• Remove the batteries
Notes:
• If lithium
batteries are temporarily unavailable, alkaline batteries can be used. However,
alkaline battery life is very short by comparison.
• The battery life for a model WDS may decrease with extended LCD display activity.
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