© 2020 tekmar 087_D - 02/20
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LED Operation
Loss of Communication Troubleshooting
If the Communication LED is not on, please try the following:
1. Confirm that the Receiver is powered with 24 V (ac) by observing that the
green Power LED is on.
2. Locate the Transmitter. Remove the cover, and push the button located below
the battery terminals. The LED will flash once to indicate transmission. Locate
the Receiver, and see if the Communication LED is on. If it does not come on, it
may be one of two problems:
• The Transmitter may be out of range. Try moving the Transmitter closer to
the Receiver. Push the transmission button inside the Transmitter and confirm
that the communication LED turns green.
• The battery life of the Transmitter batteries may have expired. This is likely the
issue if the batteries have been in extended service. They can be replaced
with 1.5V lithium batteries.
• The link may have been interrupted. Try re-linking the devices, as described
on page 4.
3. If the communication LED remains off for over 30 minutes, please call Customer
Support at (250) 545-7749 or email [email protected].
LED Indicator Status
Description
Power
Green
Normal operation
Off
No power. Check that the wires are securely
connected to the device.
Communication Green
Signal is good.
Off
No signal. There is a loss of communication or the
Transmitter battery is dead, resulting in an open
circuit error on the control.
Flashing
Signal is weak. Consider relocating a device to
obtain a stronger signal.
Low Battery
Red
Battery life is low. Replace within 3 months.
Off
Battery is good.
Step 5: Sensor Terminal Wiring
Connect 2-conductor wire between the control or device and the sensor
terminals (3 and 4) on the Receiver.
This connection is polarity sensitive.
Wire the sensor 'Com' terminal on the Receiver to the sensor 'Com'
terminal on the control or boiler.
At power-up the Receiver will report
a temperature of 75
°
F (24
°
C) until the first temperature transmission is
received (up to 10 minutes).
Wait up to 10 minutes to verify that the
temperature at the control is accurate.
If the temperature displayed
at the control is unreasonably hot the wires may be reversed.
4
Output
Com Sen
3
To outdoor sensor terminals on
tekmar or other manufacturers control
