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Testing the tekmarNet
The
symbol is shown on the display when communication is present. If the
thermostat is connected in a network and the communication is missing, there may
be an open or short circuit on the tN4 and C bus wires.
1. Remove the front cover from the thermostat.
2. To test for short circuits:
•
Disconnect the tN4 bus wires on one end.
•
Install wire nuts on each wire to ensure the wire ends are not touching.
•
Disconnect the tN4 bus wires on the other end.
•
Measure for continuity using an electrical meter.
•
If continuity is present, there is a short circuit fault along the wires. It is
recommended to replace the tN4 bus wires.
3. To test for open circuits:
•
Disconnect the tN4 bus wires on one end and connect them together.
•
Disconnect the tN4 bus wires on the other end.
•
Use an electrical meter to measure for continuity.
•
If there is no continuity, there is an open circuit fault along the wires. It is
recommended to replace the tN4 bus wires.
Mounting the Thermostat
To place the thermostat back on the
mounting base:
•
Place thermostat bottom tabs on
matching mounting base notches.
•
Pivot top of the thermostat
towards wall, ensuring wires clear
obstructions.
•
The top clasp makes a clicking
sound when properly closed.
Cleaning the Thermostat
The thermostats's exterior can be cleaned using a damp cloth. Moisten the cloth
with water and wring out prior to wiping the control. Do not use solvents or cleaning
solutions.
© 2010
D 540 - 08/10
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4 Bus
Pivot
Tab
6 of 24
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