tekmar 422 Universal Reset Module - Manual (Page 30)

© 2007 D 422 - 08/07 30 of 32
Error Message Description
MIXING EXPANSION MODULE CONFLICT
A Mixing Expansion Module is connected to the Boiler bus. The Mixing Expansion Module
must be removed from the Boiler bus or the bus must be set to Mix 2 via the tN4 Boiler / Mix2
DIP switch. The error message self clears once the error condition is corrected.
MIX 1 SENSOR SHORT CIRCUIT
Due to a short circuit, the control failed to read the Mix 1 supply sensor. As a result, the control
operates mixing device 1 at a fixed output as long as there is a call for heat. Locate and repair
the problem as described in the Data Brochure D 070.
MIX 1 SENSOR OPEN CIRCUIT
Due to an open circuit, the control failed to read the Mix 1 supply sensor. The control operates
the mixing device 1 at a fixed output as long as there is a call for heat. Locate and repair the
problem as described in the Data Brochure D 070.
MIX 2 SENSOR SHORT CIRCUIT
Due to a short circuit, the control failed to read the Mix 2 supply sensor. The Mix 2 supply
sensor is connected to the Mixing Module. The control operates the mixing device 2 at a fixed
output as long as there is a call for heat. Locate and repair the problem as described in the
Data Brochure D 070..
MIX 2 SENSOR OPEN CIRCUIT
Due to an open circuit, the control failed to read the Mix 2 supply sensor. The Mix 2 supply
sensor is connected to the Mixing Module. The control operates the mixing device 2 at a fixed
output as long as there is a call for heat. Locate and repair the problem as described in the
Data Brochure D 070.
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(s). 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.
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.
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.
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.
DEV SCHD
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.
Error Messages (2 of 3)