Install Instructions

© 2015 554_D - 02/15
41 of 44
A Watts Water Technologies Company
Error Message Description
ROOM SENSOR OPEN CIRCUIT ERROR
Due to an open circuit, the thermostat is unable to read the built-in room
temperature sensor. If Sensor 1 or 2 is set to Room, or the thermostat
is connected to a tekmarNet
®
system control, the thermostat continues
to operate; otherwise operation stops.
The error cannot be field repaired. Contact your tekmar
®
sales
representative for repair procedures.
SENSOR 1 OR 2 SHORT CIRCUIT ERROR
Due to a short circuit, the thermostat is unable to read auxiliary Sensor
1 or 2. The thermostat stops normal operation if the Sensor is the only
active Room or Floor sensor or if a Floor Maximum temperature has
been set.
Check the auxiliary sensor wire for short circuits according to the sensor
installation manual. It may be necessary to replace the auxiliary sensor.
Once the error has been corrected, the error message automatically
clears.
SENSOR 1 OR 2 OPEN CIRCUIT ERROR
Due to an open circuit, the thermostat is unable to read auxiliary Sensor
1 or 2. The thermostat stops normal operation if the Sensor is the only
active Room or Floor sensor or if a Floor Maximum temperature has
been set.
Check the auxiliary sensor wire for short circuits according to the sensor
installation manual. It may be necessary to replace the auxiliary sensor.
Once the error has been corrected, the error message automatically
clears.
If the auxiliary sensor has been intentionally removed, set the applicable
Sensor 1 or 2 setting in the Setup menu to Off.
SYSTEM CONTROL LOST ERROR
The thermostat can no longer communicate to the tekmarNet
®
system
control. Check for open or short circuits in the tekmarNet
®
communication
wiring. The error automatically clears once the tekmarNet
®
system
control has been detected.
If the tekmarNet
®
system control was intentionally removed from the
thermostat, remove and then re-apply power to clear the error.
AIR GROUP MASTER ERROR
Two thermostats have been assigned to be the master of the same
air group number.
To clear the error, go to the Setup menu and either select a different
air group master number or set the air group master to None.
Error Messages (3 of 4)