C Diagnostic Tests And Input/Output Indicators - Laars Neotherm NTH Installation And Operation Instruction Manual

N T Commercial Boilers and Water Heaters
EO HERM
11.C Diagnostic Tests and Input/
Output Indicators
Two kinds of screens are grouped together in this
section:
• Detailed indications of the input and output
signals
• Diagnostic tests of the pumps and burner
modulation
Note that these functions apply to just one selected
controller.
To access the diagnostic functions, from the home
screen, touch the control icon, then touch the
'Diagnostics' button.
1. The buttons at the bottom of the screen select
the types of inputs and outputs displayed. The
Burner Control I/O button leads to Menu 8
Menu 8. Burner Control I/O Screen
A green dot indicates a function that is "on."
2. Press the Digital I/O button to see parameters
with the functions that are either "on" or "off."
See Menu 9.
Menu 9. Digital I/O Screen
3. The button for Analog I/O displays items that
change continuously between two limits. See
Menu 10
Menu 10. Analog I/O Screen
4. Press the button for Diagnostic Tests. The
Modulation test allows you to change the
rate at which the burner fi res, and watch the
results. See Menu 11
Menu 11. Modulation Test
5. Press the Pump Test button. The Pump test
shows detailed information about the three
pumps that may be used by the system.
Menu 12. Pump Test
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