LAARS NeoTherm NTV (Sizes 399-850 MBTU/h) - Service Manual - Manual (Page 93)

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Service Manual - NeoTherm 500
Fig. D5-8 - Enable/ disable screen
Fig. D5-9 – Changing LCD contrast
Turning a Function On and Off
Some of the values can be enabled or disabled. Figure
D5-8 shows one example.
• Use the Up- and Down-Arrows to highlight the line
you want, then press the round OK button.
Changing a Value Using a “Slider”
There is another type of control screen you may see.
This type of screen uses a “slider” to set the value. This
system is used on the LCD Contrast screen (available
under Display Setup.) See Fig. D5-9.
• Use the Left- and Right-Arrow buttons to move the
bar and adjust the contrast.
• When the setting is correct, press the round OK
button.
Using the Diagnostics -
Use the Diagnostics to check the status of the sensors
and the digital inputs and outputs. The system also
records a history of lockouts and alarms.
Analog Sensors -You can use this display to check on
operating temperatures, fan speed, firing rate, etc. (The
word “analog” refers to values that can change continu-
ously between zero and a higher value.) The values
shown here are “Read Only” – you can’t change them
from this display.
Digital Input/Output -This display shows whether differ-
ent functions, inputs and outputs are either on or off.
The functions listed here include pumps, valves, alarms,
etc. The values shown here are “Read Only” – you can’t
change them from this display.
History - The system records the most recent lockouts or
alerts. (If there is a current lockout or alert, a note about
this will also appear at the bottom of the Home screen.)
Using the Current User Interface - continued
D5
cont.