tekmar 423 Universal Reset Module - Manual (Page 34)

© 2007 D 423 - 08/07 34 of 36
Error Messages (4 of 5)
Error Message Description
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 to the boiler’s aquastat or boiler control
until the sensor is repaired. The control will not operate the boiler contact if the Boil Minimum
setting is less than 100°F (38.0°C). Locate and repair the problem as described in the Data
Brochure D 070. The error message self clears once the error condition is corrected
Note: If you deliberately remove the boiler sensor, set the Boiler Sensor Return / Supply DIP
switch to Return. Power down for 10 seconds then restart the control.
OUTDOOR SENSOR SHORT CIRCUIT
Due to a short circuit, 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 Data Brochure D 070. The error message self clears once
the error condition is corrected.
OUTDOOR SENSOR OPEN CIRCUIT
Due to an open circuit, 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 Data Brochure D 070. The error message self clears once
the error condition is corrected.
DHW 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 Data Brochure
D 070. DHW tank heating will resume once the sensor problem is corrected. The error message
self clears once the error condition is corrected.
DHW 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 Data Brochure
D 070. DHW tank heating will resume once the sensor problem is corrected. The error message
self clears once the error condition is corrected.
DHW ERROR
A DHW Sensor and a DHW Demand have been applied at the same time. The DHW tank
will not be heated until the DHW Demand signal is removed. The error message self clears
once the error condition is corrected.
DEVICE SCHEDULE ERROR
The selected system schedule is no longer available. Either the system schedule master is
no longer connected to the network or the system schedule number has been changed on
the schedule master. The error message self clears once the error condition is corrected.
BOILER BUS AND RETURN SENSOR CONFLICT
There is a DIP switch settings conflict. The Boiler Sensor DIP Switch is set to Ret (Return)
and there is a tN4 device on the Boiler bus. The error message clears once the tN4 device
is removed from the Boiler bus or the DIP Switch is set to Sup (Supply).