Laars NTH1000, Installation And Operation Instructions Manual

Page: 117 / 140

NeoTherm LC Boilers and Water Heaters Page 113
12.4 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.
How to get there –
Home Page <Select icon> Status Summary Screen
<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 Fig. 129.
Fig. 129 - Burner Control I/O Screen
A green dot indicates a function that is “on.”
2. Press the Digital I/O button to look at
functions where the functions are either “on”
of “off.” See Fig. 130.
Fig. 130 – Digital I/O Screen
3. The button for Analog I/O displays items that
change continuously between two limits. See
Fig. 131.
Fig. 131 - Analog I/O Screen
4. Press the button for Diagnostic Tests. The
Modulation test allows you to change the
rate at which the burner fires, and watch the
results. See Fig. 132.
Fig. 132 – Modulation Test
5. Press the Pump Test button. The Pump test
shows detailed information on the activity
of the three pumps that may be used by the
system.
Fig. 133 – Pump Test