Watts tekmar 294 - Troubleshooting - Errors and Alerts (2)

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)