47
68-0139
W180 ZONE CONTROL SYSTEM
TABLE 14—TEMPERATURE SENSORS.
Problem
Solution
Reading
wrong
temperature.
1. Verify that there are no inductive loads nearby.
2. Verify that nothing is covering the sensor.
3. Verify that there is not a heating or cooling source nearby.
4. Verify that all connections are secure.
5. Verify the zoning assignments.
6. If equipped, check the override button.
7. Verify that the W180A Controller is operating (LED is flashing once per second).
8. Verify the wiring between the sensor and the W180A Controller.
9. Replace the sensor.
No
temperature
reading.
1. Verify that the W180A Controller is operating (LED is flashing once per second).
2. Verify that all connections are secure.
3. Verify the wiring between the sensor and the W180A Controller.
4. Replace the sensor.
5. Verify that the sensor input is working by inserting a 3.3K resistor between the input + and –.
This should give a reading of about 43
°
F (C7130A and T7660A/T7660B) and 71
°
F (C7180A).
TABLE 15—DAMPERS.
TABLE 16—VALVES.
Problem
Solution
Valve does not
open or close.
1. Verify that the W180A Controller is operating (LED is flashing once per second).
2. Verify that the valve is wired to the correct relay output.
3. Verify that the relay output is configured properly.
4. Verify that the relay cards are seated properly.
5. Verify that there are no obstructions at the valve.
6. Replace the valve.
Problem
Solution
No airflow when
damper should
be open or air-
flow when the
damper is closed.
1.
Verify that the damper is open/closed as required.
NOTE: The D635 damper is bidirectional and takes 90 seconds to fully open or close.
AOBD dampers are unidirectional and take 15 seconds to complete a cycle. They must
complete a cycle before another cycle can begin.
2.
Verify that 24 Vac is present at the damper.
3.
Verify that the damper is wired properly and verify the zone assignment.
4.
Verify that the W180A Controller is operating (LED is flashing once per second).
5.
Verify that the relay cards are seated properly.
6.
Verify that there are no obstructions at the damper.
7.
Verify that there is not a hole in the duct.
8.
Verify that the actuator operates.
9.
Verify that the gear box, crank arm, and/or collar are functional.
10.
Replace the damper.
Damper makes
squeaking or
scratching
sounds.
1.
Verify that the damper is not out of round or square.
2.
Verify that the damper blade is secure in the shaft.
3.
Verify that the shaft is in the collar.
4.
Verify that there is not water in the drive mechanism.
5.
Verify that there is nothing between the damper and duct.
Noisy air flow.
Insulate around the duct where the noise is heard.
