Installation and Maintenance Manual

Diagnostics
UV-SVN02C-EN 99
but the receiver determines the ultimate output power
level of the sensor.
Output Values—Failure and Default Modes of
Operation (Wireless Controls)
The following table provides output values for failure and
default modes of operation, which can be used for
troubleshooting.
Measuring Output Resistance (Wireless
Controls)
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:
a. All models: Measure between the grounded GND-
SIGN
AL (black) wire and either the SETPOINT (red)
or ZONE (white) wire. Compare resistance
measurements to those in Table 45, p. 99.
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 46, p. 99.
Note: The output circuits are not electrically
powered; consequently, resistance can be
measured without risk of damage to the
volt-ohm meter.
Cleaning the Sensor (Wireless Controls)
You can clean the sensor by applying glass cleaner to a
soft, non-abrasive cloth, and gently wiping the face,
including the buttons and LCD display. Use of a pre-
moistened towelette designed for lens or screen cleaning
is also acceptable.
Avoid inadvertent pressing of the Occupied/Unoccupied
buttons on the keypad on the WDS sensor as this may
result in an unwanted timed override or settings change.
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
Table 45. Receiver resistance table for all models
(wireless controls)
Zone or setpoint
temperature
Nominal zone
temperature output
resistance
Nominal setpoint
and heating
setpoint output
resistance
55°F (12.8°C) 17.47 kΩ 792 Ω
60°F (15.6°C) 15.3 kΩ 695 Ω
65°F (18.3°C) 13.49 kΩ 597 Ω
70°F (21.1°C) 11.9 kΩ 500 Ω
75°F (23.9°C) 10.5 kΩ 403 Ω
80°F (26.7°C 9.3 kΩ 305 Ω
85°F (29.4°C) 8.25 kΩ 208 Ω
Table 46. Receiver resistance table for model WDS
(wireless controls)
Fan command Nominal output resistance
High 16,130 Ω
Med 13,320 Ω
Low 10,770 Ω
Auto 2320 Ω
Off 4870 Ω
NOTICE:
Equipment Damage!
Spraying glass cleaner or any other solution directly on
the sensor may damage it.
UV-SVN02_-EN.book Page 99 Thursday, January 24, 2013 4:48 PM