Trane VAV VV550 LonTalk, Руководство по установке и эксплуатации

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94 VAV-SVP01A-EN
Troubleshooting
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 25, p. 94 .
• When the test is complete, reset the receiver address to its previous setting.
• Press the Test button (S5) on the sensor to force re-association.
Confirm association and communication by noting LED1, LED2, and LED3 as described in "Signal
Quality Test"
• Pressing the Test button (S5) on the sensor initiates a signal quality test. LED1, LED2, and
LED3 respond by indicating excellent, marginal, or poor signal quality. The LEDs can be
observed on both the sensor (
Table 26, p. 95 ) and the receiver ( Table 27, p. 95 ).
Table 24. Output failure modes of operation
Situation Zone Temperature Output Zone Setpoint Output
Receiver address = 000
11.17 k Ω , 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 k Ω , 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 25. Receiver resistance
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
75
o
F (23.9
o
C) 10.5 k Ω 403 Ω
80
o
F (26.7
o
C) 9.3 k Ω 305 Ω
85
o
F (29.4
o
C) 8.25 k Ω 208 Ω