LAARS NeoTherm NTV (Sizes 150–285 MBTU/h) - Service Manual - Manual (Page 78)

68 Service Manual NeoTherm 80 - NeoTherm 285
Using the Original (White) User Interface - continued
Normally you will want to do the “high fire” setup first. Press Next again until
you see “Max,” then press Next one more time. The display will step between
a number (again, the current outlet temperature) and “100%” (the firing rate for
high fire. Adjust the gas valve to get the correct CO
2
value.
To do the “low fire” setting, you do not have to press Next again. Instead, use
the Down arrow to reduce the firing rate to 10%.
Important - When you have finished the combustion testing and gas valve ad-
justment, press the Done button to return to normal operations. When you are
finished changing values in the User or Setup mode, you must press the Done
button to save the new values, or the interface will use the old values.
Reacting to Lockouts
on the Original (White) User Interface
The system responds to three kinds of trouble indications:
• A ”lockout” is caused by a serious problem that might involve a safety issue.
Once the controller enters a lockout, the burner will shut down, and will not
be allowed to run again until the cause of the problem is corrected, and you
reset the control system.
• The system may enter a “hold” for a period of time before locking out. This
allows the controller to see if the error is corrected before it goes to a hard
lockout.
• An “alert” indicates that some feature of the control system’s operation was
not correct, delayed, or waiting for a response. This does not necessarily
indicate a problem.
Here is the procedure used to recover from a Lockout.
• The “Lockout” indication will appear in the lower left-hand corner of the dis-
play, and the lockout code will flash in the center.
• Write down the lockout code, and look it up in the Appendix at the end of
this manual.
• Press the Reset button near the lower left-hand corner of the display. This
will reset the lockout, and the lockout code will disappear. (This is why we
told you to write it down.)
If the problem condition is still present, the unit will lockout again. See Section A
for troubleshooting instructions.
You can also check the last lockout or alert code using the Diagnostic mode of
the display:
Press and hold the Next button until the display shows the flame signal followed
by “µA.” This tells you the display is in the Diagnostic mode.
Press Next again to see the last alert. Press Next one more time to see the last
lockout.
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cont.
D3