Installation and Maintenance Manual

Troubleshooting
50 VAV-SVX01D-EN
• Press theTest button (S5) on the sensor. LED5
should turn On solid green, indicating proper
battery strength. LED1, LED2, and LED3 will indicate
signal strength (See table 2).
Note: When checking signal strength, both LED1 and
LED3 on the receiver and sensor should illuminate
in unison if the sensor and receiver are associated.
Use this feature to confirm association. If not
associated, see setup procedures in Wireless
chapter. If unit still does not work proceed in
checking Receiver and sensor with testing
procedures below.
2. Procedure forTesting the Receiver
• Make sure the receiver is powered.
• Set the receiver address to 000 to force the zone
temperature output and zone temperature setpoint
output to their test mode values (see Table 19,
p. 50).
3. Measure the receiver output resistance by following
the procedures
• Make sure the black wire (GNS-SIGNAL) and the
yellow wire (GND-POWER) are grounded (see
above for wiring diagrams).
• Make sure the receiver is powered up.
• Disconnect the SETPOINT wire (red) and the ZONE
wire (white) from the host unit controller.
• Measure resistance between the grounded GND-
SIGNAL wire and either the SETPOINT or ZONE
wire. Compare resistance measurements to those
presented in Table 20, p. 50.
Table 17. Battery status: LED5 on the sensor
User Action LED Display Indicates…
Press Test
Button (SS)
Solid green for 5
seconds
Battery condition is adequate
for proper operation.
Solid red for 5
seconds
Battery condition is low.
Batteries should be replaced.
No light
Batteries are totally dead or
not installed properly, or
sensor is defective.
None
Blinking red: 1-blink
pattern
1
repeated 5
times. Cycle repeats
every 15 minutes.
Battery condition is low.
Approximately 14 days of
operation remain before the
battery is too weak to power
the sensor.
Note: 1 Blink pattern is On for ¼ s, Off for 3/4 s, with 2 s Off between
repetitions.
Table 18. Signal quality: LED1, LED2, LED3 on the sensor
User Action LED Display Indicates…
None
LED1:Off
LED2:Off
LED3:Off
Normal state
* No Test button press
Press Test
Button (SS)
LED1:Off
LED2:Off
LED3:Off
Associated; no
communication with receiver
* Associated, but no signal
from the receiver after
pressing Test button
Press Test
Button (SS)
LED1:On
LED2:On
LED3:On
Displays for 5 seconds,
then constantly off
Excellence signal quality
* Adequate signal margin for
reliable communication.
Press Test
Button (SS)
LED1:Off
LED2:On
LED3:On
Displays for 5 seconds,
then constantly off
Marginal signal quality
* Reduced battery life likely.
* Consider moving the sensor
or receiver to a better
location.
Press Test
Button (SS)
LED1:Off
LED2:Off
LED3:On
Displays for 5 seconds,
then constantly off
Poor signal quality
* Unreliable communication.
* Strongly recommend
moving the sensor or
receiver to a better location.
Figure 37.
Table 19. Output failure modes of operation
Situation
Zone
Temperature
Output
Zone Setpoint
Output
Receiver address = 000
11.17 kΩ, 72.5
o
F
(22.5
o
C),
indefinitely
451 Ω, 72.5
o
F
(22.5
o
C),
indefinitely
Receiver address = 001 to 999
Receiver has powered up, but
has not received a
communication from sensor.
11.17 kΩ, 72.5
o
F
(22.5
o
C)
451 Ω, 72.5
o
F
(22.5
o
C)
Receiver address = 001 to 999
Receiver does not receive a
communication within 35
minutes from the sensor it is
associated with
Open Open
Receiver has no power Open Open
Thermistor in sensor has failed to
either open or close
Open Normal value
Setpoint potentiometer has
failed to either open or close
Normal value Open
Table 20. Receiver resistance table
Zone or Setpoint
Temperature
Nominal Zone
Temperature
Output Resistance
Nominal Space
Temperature
Setpoint Output
Resistance
55
o
F (12.8
o
C) 17.47 k Ω 812 Ω
60
o
F (15.6
o
C) 15.3 k Ω 695 Ω
65
o
F (18.3
o
C) 13.49 k Ω 597 Ω
70
o
F (21.1
o
C) 11.9 k Ω 500 Ω