Trane WDS, Installation, Operation And Maintenance Manual

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44 Wireless Sensors • BAS-SVX04C-EN
Maintenance and Troubleshooting
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 (see
Figure 4, p. 16 or Figure 3, p. 16 for wiring
diagrams).
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:
a. All models: Measure between the grounded GND-SIGNAL (black) wire and either
the SETPOINT (red) or ZONE (white) wire. Compare resistance measurements to
those in
Table 8 .
b. WDS only: Measure between the grounded GND-SIGNAL (black) wire and the
FAN/SYSTEM (green) wire. Compare resistance measurements to those given in
Table 9 .
Situation
Zone
temperature
output
Zone setpoint
output
Heating
setpoint
output
Fan/System
output
Receiver address = 000 11.17 k Ω ,
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 k Ω ,
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