NTI TRX085 - Page 104

104
420012001500 - 03182024 - Rev. 04
1 04*
104
Supply temperature rose
faster than 27 degrees per
second
Reset the error by tapping the reset button.
"Blocking
(Manual
Reset)"
Air in the system
Ensure boiler is free of air and pressurized to at least
20PSI.
Failed internal circulator/
internal circulator not
powered
If the problem occurs during heating and hot water
demands, ensure return filter is clear, and the internal
pump is operating properly (blue light on solid)
Verify the pump has 120VAC with the heating or hot
water call is active.
Plugged plate heat
exchanger(combi only)/
indirect hot water tank
If problem occurs during hot water demands only,
check the plate exchanger (combi boilers only) or
indirect hot water tank and plumbing for a blockage.
Improper piping or boiler
commissioning
If not using the DHW connection ensure the diverting
valve is moving freely and is in the heating position
(upper position) See diverting valve stuck, ensure the
piping matches the instructions in the installation
manual for that specific model.
Damaged/ Malfunctioning
temperature sensor
Swap the inlet and outlet sensors and verify that the
sensors read correctly in both positions. If the sensors
differ by more than 5F, replace the sensors, check for
water damage or corrosion on sensors.
1 05*
105
Supply temperature excee-
ded return temperature by
more than 99F three times
in a row.
Reset the error by tapping the reset button
Blocking
(Manual
Reset)
Air in the system
Ensure boiler is free of air and pressurized to at least
20PSI
Failed internal circulator/
internal circulator not
powered
If the problem occurs during heating and hot water
demands, ensure return filter is clear, and the internal
pump is operating properly (blue light on solid) Verify
the pump has 120VAC with the heating or hot water
call is active
Plugged plate heat
exchanger(combi only)/
indirect hot water tank
If problem occurs during hot water demands only,
check the plate exchanger (combi boilers only) or
indirect hot water tank and plumbing for a blockage.
Improper piping or boiler
commissioning
If not using the DHW connection ensure the diverting
valve is moving freely and is in the heating position
(upper position) See diverting valve stuck, ensure the
piping matches the instructions in the installation
manual for that specific model.
Damaged/ Malfunctioning
temperature sensor
Swap the inlet and outlet sensors and verify that the
sensors read correctly in both positions. If the sensors
differ by more than 5F, replace the sensors, check for
water damage or corrosion on sensors. Compare the
resistance of the sensor to the temperature resistance
chart.
PCB failure
Check menu 8.5.5. if the software version is 00.44.03
or 00.44.01 replace the PCB.
Part 13 - Troubleshooting
Display Error code Error Description
Possible cause
based on priority
Possible Remedies
Error
Type