tekmar 403 House Control Installation - Manual (Page 29)

29 of 32 © 2011 D 403 - 07/11
Error Message Description
OUTDOOR SENSOR OPEN CIRCUIT
Due to an open circuit (disconnected or broken wire), the control failed to read the outdoor
sensor. As a result, the control assumes an outdoor temperature of 32°F (0.0°C) and
continues operation. Locate and repair the problem as described in the “Test the Sensor
Wiring” section.
MIX SENSOR SHORT CIRCUIT
Due to a short circuit, the control failed to read the Mix supply sensor. As a result, the control
operates the mixing device at a fixed output as long as there is a call for heat. Locate and
repair the problem as described in the “Test the Sensor Wiring” section.
MIX SENSOR OPEN CIRCUIT
Due to an open circuit (disconnected or broken wire), the control failed to read the Mix supply
sensor. The control operates the mixing device at a fixed output as long as there is a call for
heat. Locate and repair the problem as described in the “Test the Sensor Wiring” section.
BOILER SENSOR SHORT CIRCUIT
Due to a short circuit, the control failed to read the boiler sensor. When there is a call for heat,
the control no longer controls the boiler. Instead, the control provides a boiler enable and the
boiler operates on its aquastat/limit until the sensor is repaired. The control will not operate
the boiler contact if the Boil Minimum setting is set to Off. Locate and repair the problem as
described in the “Test the Sensor Wiring” section.
BOILER SENSOR OPEN CIRCUIT
Due to an open circuit, the control failed to read the boiler sensor. The control no longer
controls the boiler. Instead, the control provides a boiler enable and the boiler operates on its
aquastat/limit until the sensor is repaired. The control will not operate the boiler contact if the
Boil Minimum setting is set to Off. Locate and repair the problem as described in the “Test
the Sensor Wiring” section.
DOMESTIC HOT WATER SENSOR SHORT CIRCUIT
Due to a short circuit, the control failed to read the DHW sensor. As a result, the control no
longer heats the DHW tank. Locate and repair the problem as described in the “Test the
Sensor Wiring” section. DHW tank heating will resume once the sensor problem is corrected.
The error message self clears once the error condition is corrected.
DOMESTIC HOT WATER SENSOR OPEN CIRCUIT
Due to an open circuit, the control failed to read the DHW sensor. As a result, the control
no longer heats the DHW tank. Locate and repair the problem as described in the “Test the
Sensor Wiring” section. DHW tank heating will resume once the sensor problem is corrected.
The error message self clears once the error condition is corrected.
DOMESTIC HOT WATER CALL ERROR
A DHW sensor and a DHW call have been applied at the same time. The DHW tank will not
be heated until the DHW call signal is removed. The error message self clears once the error
condition is corrected.
BOILER DEVICE LOST (b:01 TO b:24)
Each tekmarNet
® device (thermostat, setpoint control, timer) has an address. The device with
this address on the boiler water temperature is no longer reporting back to the 403.
The device can be located by either the address, or by going to each device in the building,
checking that the LCD is on, and the tekmarNet
® communication symbol is on. Trace the wires
from the control to the lost device looking for loose or damaged wires.
Note: If you deliberately remove a tekmarNet
® device, hold the Up and Down buttons to clear
this error.
Error Messages (2 of 3)