122 UNT-SVX07B-EN
Diagnostics
Procedure for Testing the Receiver
If the receiver is not working as expected:
1. Verify that the receiver is powered.
2. Set the receiver address to 000 to force the zone temperature output and zone temperature
setpoint output to their default mode values (see “Output Values—Failure and Default Modes
of Operation,” p. 122).
3. Measure the receiver output resistance (see “Measuring Output Resistance,” p. 122).
4. When the test is complete, reset the recei
ver address to its previous setting.
5. Press the Test button on the sens
or to force re-association.
6. Confirm association and communication by noting LED1,
LED2, and LED3 as described in
“Testing Signal Strength,” p. 117 .
Forcing a Sensor to Transmit
To force a wireless sensor to transmit during servicing, press the Test button on the sensor.
Output Power Level
The maximum output power level of a wireless sensor set is controlled by software and restricted
by channel of operation and agency requirements per country or region. The sensor has a default
maximum power level of 10 mW, but the receiver determines the ultimate output power level of
the sensor.
Output Values—Failure and Default Modes of Operation
The following table provides output values for failure and default modes of operation, which can
be used for troubleshooting.
Measuring Output Resistance
To measure the resistance of receiver outputs for zone temperature and setpoints for all models,
and heating setpoint and fan/system for the WDS:
1. Ensure that the GND-SIGNAL (black) wire and the GND-POWER (yellow) wire are grounded to
the transformer.
2. Disconnect the ZONE (white) and SETPOINT (RED)
wires from the controller. Disconnect the
HEAT SETPOINT (brown) and FAN/SYSTEM (green) wires from the controller, if applicable.
3. Measure resistance as follows:
Table 44. Output values
Situation
Zone
temperature
output
Zone setpoint
output
Heating setpoint
output
Fan/System
output
Receiver address = 000 11.17 kΩ, 72.5°F
(22.5°C), indefinitely
451 Ω, 72.5°F
(22.5°C), indefinitely
501 Ω, 70.5°F
(21.4°C), indefinitely
2320 Ω
Fan = Auto
System = Off
Receiver address = 001 to 999 and:
Receiver is powered up, but not is associated, or
Receiver has received a disassociation request from the
associated sensor.
11.17 kΩ, 72.5°F
(22.5°C) Hold for 15
minutes, then open
451 Ω, 72.5°F
(22.5°C),
Hold for 15 minutes,
then open
501 Ω, 70.5°F
(21.4°C), indefinitely
2320 Ω
Fan = Auto
System = Off
Receiver address = 001 to 999 and receiver has not received
a communication within 35 minutes from the associated
sensor.
Open Open Open Open
Receiver has no power. Open Open Open Open
Thermistor in sensor has failed to either open or close. Open Normal value Normal value N/A
Setpoint potentiometer has failed to either open or close. Normal value Open Open N/A
To Next Page
Loading...
Need help?
General