48
IOM-T-294
2205
© 2022 tekmar
It is recommended to complete all wiring to ensure trouble free operation . Should an error occur, simply follow these steps:
1 .
Find:
If a banner is on the screen, it is indicating a problem on the system .
2 .
Identify:
Press the
BARS
icon on the top right corner to enter the menus and press notifications . The latest error notification will
appear at the top of the list .
3 .
Solve:
The notification description provides the instructions on the corrective action require to clear the error .
Error Title
Description
Control Memory
Error
A memory error has been detected . The control will not operate the boilers until all settings have been reviewed .
You may also reload factory defaults and use the Setup Wizard to configure the control . If the memory error
keeps recurring after a power outage, the control may require replacement . Consult technical support
for assistance .
Boiler Sensor Short
Error
A short circuit is detected on the boiler supply temperature sensor input . The control will not operate the
boilers until this fault is corrected .
To correct, remove the wires from the boiler supply sensor terminals, then use an electrical multimeter to measure
the resistance . The resistance should be proportional to the temperature lookup table in the Installation and
Operation Manual . Check the wires for damage . If the wires are OK, then replace the Universal Sensor 082 .
Once the fault is corrected, the error clears automatically .
Boiler Sensor Open
Error
An open circuit is detected on the boiler supply temperature sensor input . The control will not operate the
boilers until this fault is corrected .
To correct, remove the wires from the boiler supply sensor terminals, then use an electrical multimeter to measure
the resistance . The resistance should be proportional to the temperature lookup table in the Installation and
Operation Manual . If the resistance is open circuit, check the wires for loose wiring connections . If the wires
are OK, then replace the Universal Sensor 082 . Once the fault is corrected, the error clears automatically .
Domestic Hot Water
Short Sensor Error
A short circuit is detected on the domestic hot water temperature sensor input . The control will not heat the
domestic hot water tank until this fault is corrected .
To correct, remove the wires from the DHW sensor terminals, then use an electrical multimeter to measure
the resistance . The resistance should be proportional to the temperature lookup table in the Installation and
Operation Manual . If the resistance is short circuit, check the wires for damage . If the wires are OK, then
replace the Universal Sensor 078 . Once the fault is corrected, the error clears automatically .
Domestic Hot Water
Open Sensor Error
An open circuit is detected on the domestic hot water temperature sensor input . The control will not heat the
domestic hot water tank until this fault is corrected .
The DHW sensor is optional and the setting incorrectly turned on . Check if a sensor is installed . If not installed,
set DHW Sensor to off . If installed, remove the wires from the DHW sensor terminals, then use an electrical
multimeter to measure the resistance . The resistance should be proportional to the temperature lookup table
in the Installation and Operation Manual . If the resistance is open circuit, check the wires for loose wiring
connections . If the wires are OK, then replace the Universal Sensor 078 . Once the fault is corrected, the error
clears automatically .
Outdoor Sensor
Short Error
A short circuit is detected on the outdoor air temperature sensor input . The control operates the central heating
system at the boiler design temperature until this fault is corrected .
To correct, remove the wires from the outdoor air sensor terminals, then use an electrical multimeter to measure
the resistance . The resistance should be proportional to the temperature lookup table in the Installation and
Operation Manual . If the resistance is short circuit, check the wires for damage . If the wires are OK, then
replace the Outdoor Sensor 070 . Once the fault is corrected, the error clears automatically .
Outdoor Sensor
Open Error
An open circuit is detected on the outdoor air temperature sensor input . The control operates the central
heating system at the boiler design temperature until this fault is corrected .
To correct, remove the wires from the outdoor air sensor terminals, then use an electrical multimeter to measure
the resistance . The resistance should be proportional to the temperature lookup table in the Installation and
Operation Manual . If the resistance is open circuit, check the wires for loose wiring connections . If the wires
are OK, then replace the Outdoor Sensor 070 . Once the fault is corrected, the error clears automatically .
Troubleshooting
Errors and Alerts (1 of 4)
