© 2013
553_D - 04/13
45 of 48
A Watts Water Technologies Company
Error Message
Description
DEVICE LIMIT
More than 24 devices (thermostats or setpoint controls) have been
connected to the tekmarNet
®
communication bus. To clear the error,
remove and relocate devices to other available buses until the device
count is 24 or less.
ROOM SENSOR SHORT CIRCUIT ERROR
Due to a short 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.
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.
LOCAL HUMIDITY SENSOR ERROR
The built-in humidity sensor is faulty. 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.
Error Messages (3 of 5)
