Error messages – tekmar 360 Mixing Control User Manual
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© 2009 D 360 - 03/09
The control was unable to read a piece of information from its EEPROM. This error can be caused by 
a noisy power source. The control will load the factory defaults and stop operation until all the settings 
are verified.
The control is no longer able to read the outdoor sensor due to a short circuit. In this case the control 
assumes an outdoor temperature of 32°F (0°C) and continues operation. Locate and repair the problem 
as described in the Data Brochure D 070. To clear the error message from the control after the sensor 
has been repaired, press the Item button.
The control is no longer able to read the outdoor sensor due to an open circuit. In this case the control 
assumes an outdoor temperature of 32°F (0°C) and continues operation. Locate and repair the problem 
as described in the Data Brochure D 070. To clear the error message from the control after the sensor 
has been repaired, press the Item button.
The control is no longer able to read the mixing supply sensor due to a short circuit. In this case the 
control will operate the mixing valve at a fixed output as long as there is a mixing demand. Locate and 
repair the problem as described in the Data Brochure D 070. To clear the error message from the control 
after the sensor has been repaired, press the Item button.
The control is no longer able to read the mixing supply sensor due to a short circuit. In this case the 
control will operate the mixing valve at a fixed output as long as there is a mixing demand. Locate and 
repair the problem as described in the Data Brochure D 070. To clear the error message from the control 
after the sensor has been repaired, press the Item button.
The control is no longer able to read the boiler sensor due to a short circuit. If the BOIL MIN adjustment 
is higher than 100°F (38°C), the control closes the Boiler contact when the mixing valve starts to oper-
ate. The boiler temperature is then limited by the operating aquastat. If the BOIL MIN adjustment is lower 
than 100°F (38°C), the control does not operate the Boiler contact. Locate and repair the problem as 
described in the Data Brochure D 070. To clear the error message from the control after the sensor has 
been repaired, press the Item button.
The control is no longer able to read the boiler sensor due to an open circuit. If the BOIL MIN adjustment 
is higher than 100°F (38°C), the control closes the Boiler contact when the mixing valve starts to oper-
ate. The boiler temperature is then limited by the operating aquastat. If the BOIL MIN adjustment is lower 
than 100°F (38°C), the control does not operate the Boiler contact. Locate and repair the problem as 
described in the Data Brochure D 070. If the boiler sensor is deliberately removed, the control must be 
powered down, and then powered back up. To clear the error message from the control after the sensor 
has been repaired, press the Item button.
The control is no longer able to read the indoor sensor due to a short circuit. The control will continue to 
operate as if there was nothing connected to the indoor sensor input. Locate and repair the problem as 
described in the Data Brochure D 074. To clear the error message from the control after the sensor has 
been repaired, press the Item button.
The control is no longer able to read the indoor sensor due to an open circuit. The control will continue to 
operate as if there was nothing connected to the indoor sensor input. Locate and repair the problem as 
described in the Data Brochure D 074. If the indoor sensor is deliberately removed, the control must be 
powered down, and then powered back up. To clear the error message from the control after the sensor 
has been repaired, press the Item button.
The control enclosure has overheated or control has an internal error. The control will stop operation 
until condition is corrected. Try resetting by powering down, waiitng for 1 minute, and powering back 
up.
Error Messages
