IOM-T-294
2205
© 2022 tekmar
49
Error Title
Description
tekmarNet Outdoor
Sensor Error
The control has not received an outdoor temperature report from the tekmarNet network . Check the tekmarNet
network for the location of the outdoor sensor measurement . Check the sensor for open or short circuits
and replace the Outdoor Sensor 070 if necessary . Once the fault is corrected, the error clears automatically .
Internet Outdoor
Sensor Error
The control has not received an outdoor temperature report from the Internet . Please check that your Router
is not blocking Port 443 . Please contact an IT professional if assistance is required .
Pressure Sensor
Open Circuit Error
An open circuit is detected on the pressure sensor input . The control continues to operate normally but is
unable to detect pressure changes . If a pressure sensor is not installed, set the Pressure Sensor setting in
the System menu to Off .
If a pressure sensor is installed, inspect the wires for loose connections . If the wires are OK, use an electrical
meter to measure the DC voltage between the pressure sensor Ref and Gnd terminals . This should measure
5 .0 V(dc) . Then check the voltage between pressure sensor In and Gnd . This voltage should measure 0 .5 to
4 .5 V(dc) depending on the system pressure . If either voltage reading is abnormal then replace the Pressure
Sensor 088 . Once the fault is corrected, the error clears automatically .
Pressure Sensor
Short Circuit Error
A short circuit is detected on the pressure sensor input . The control continues to operate normally but is
unable to detect pressure changes .
Inspect the pressure sensor wires for damage . If the wires are OK, use an electrical meter to measure the DC
voltage between the pressure sensor Ref and Gnd terminals . This should measure 5 .0 V(dc) . Then check the
voltage between pressure sensor In and Gnd . This voltage should measure 0 .5 to 4 .5 V(dc) depending on the
system pressure . If either voltage reading is abnormal then replace the Pressure Sensor 088 . Once the fault
is corrected, the error clears automatically .
Expansion
Communication
Error
The control has lost communication to all Smart Boiler Expansion . Boilers 5 through 16 will not operate until
this error is corrected .
To correct, check the expansion communication wires +, -, and Gnd on both the control and expansion to
ensure the wire polarity is correct, the wire insulation is stripped, and the wire terminals are tight .
Expansion 5 to 8
Lost Error
The control has lost communication to the Smart Boiler Expansion operating boilers 5 to 8 . Boilers 5 through
8 will not operate until this error is corrected .
To correct, check that the expansion power light is on . If the power light is off, use an electrical multimeter
to check the power line and neutral terminals for 115 V(ac) . If the expansion power light is on, then check the
expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity
is correct, the wire insulation is stripped, and the wire terminals are tight .
Expansion 9 to 12
Lost Error
The control has lost communication to the Smart Boiler Expansion operating boilers 9 to 12 . Boilers 9 through
12 will not operate until this error is corrected .
To correct, check that the expansion power light is on . If the power light is off, use an electrical multimeter
to check the power line and neutral terminals for 115 V(ac) . If the expansion power light is on, then check the
expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity
is correct, the wire insulation is stripped, and the wire terminals are tight .
Expansion 13 to 16
Lost Error
The control has lost communication to the Smart Boiler Expansion operating boilers 13 to 16 . Boilers 13
through 16 will not operate until this error is corrected .
To correct, check that the expansion power light is on . If the power light is off, use an electrical multimeter
to check the power line and neutral terminals for 115 V(ac) . If the expansion power light is on, then check the
expansion communication wires +, -, and Gnd on both the control and expansion to ensure the wire polarity
is correct, the wire insulation is stripped, and the wire terminals are tight .
tN4 Bus Error
Communication has been lost on the Boiler Bus . Check the tN4, C and R wires for each tN4 device . Check
the polarity of the C and R wires . Check for loose or broken wires . The error message self clears once the
error condition is corrected .
tN4 Device
b:01 to b:24
Lost Error
Communication is lost to tekmarNet device with address b:## . The ## varies from 01 to 24 .
To correct, ensure that there is power to the lost device . Trace the wires from the control to the lost device
looking for loose or damaged wires . The error message self clears when the error condition is corrected . If the
tN4 device is deliberately removed, go to the Reset menu and press tekmarNet Device Reset .
tN4 Duplicate
Master Error
More than one tN4 system control has been detected on the tN4 Boiler Bus . The 294 is a “Master Device”
and no other tekmarNet boiler control can be added to the tN4 Boiler Bus terminals .
To correct, remove all other tekmarNet boiler controls from the tN4 Bus .
Errors and Alerts (2 of 4)
