tekmar 480 User Switch Installation - Manual (Page 7)

7 of 8 © 2009 D 480 - 09/09
Error Messages
Error Messages & Troubleshooting
Applications using Multiple 480 and 481 Together
Multiple User Switches 480 and 481 can be used together
when:
1) Applications require more than 3 User Buttons.
2) Applications require both input demands and output
relay contacts.
3) User Switches with the same functionality are required
at different locations.
Each tN4 bus cannot exceed 24 devices. Devices include
thermostats, setpoint controls, mixing expansion modules,
and user switches.
When using multiple User Switches at the same location,
they can be installed adjacent to each other in the same
switch box.
Applications requiring more than 3 User Buttons
When more than 3 User Buttons are required, two or more
User Switches can be located next to each other in a double
switch box. Each button can be programmed to either select
a scene or provide a setpoint enable.
Application Example:
Applications that select more than three scenes or setpoint
device enables will require two or more User Switches.
Symptom Cause Corrective Action
3 Buttons
Flashing Red
User
Button
1
User
Button
2
User
Button
3
User Switch
disconnected from
tN4 bus.
• • Check tN4 and common
wires for loose wire
connections.
• • Ensure the tN4 controls have
power.
• • Check R and C wires for
correct polarity.
1 Button
Flashing Red
User
Button
1
User
Button
2
User
Button
3
User
Button
1
User
Button
2
User
Button
3
User
Button
1
User
Button
2
User
Button
3
or or
The User Button
is configured for
setpoint device
enable operation
and there is no
response from the
tN4 setpoint control. • • Ensure the setpoint device
has power and is connected
to the tN4 bus.
• • Ensure the setpoint device
enable number of the
User Button and of the tN4
setpoint control match.
Applications with both input demands and output
relay contacts
Applications that require input demands and output contacts
require a 480 and a 481. The 480 provides the input demands
and the 481 provides the output contacts.
Application Example:
A third party telephone switch device allows a user to
change the scene from 1 to 2 (Away) through the demand
input on the 480. Should a critical or non-critical error
occur on the tN4 system, a 481 can close an alert contact
to allow a third party telephone switch to page a service
technician.
User Switches with the same functionality at
different locations
There may be applications where there are two or more
User Switches installed in a building. Each of the User
Switch User Buttons can be programmed with the same
functionality. When an User Button is pressed, User Buttons
with the same functionality will all light green at the same
time.
Application Example:
A User Switch is installed in the garage and another User
Switch is installed in the master bedroom.