User Guide

LAARS Heating Systems
Page 6
LAARS Heating Systems
Page 42
5.3 Operating Mode
SECTION 5. Control Display and Operation
Operating Mode
After the Power is turned on, and/or the Control Display is turned on , the Control Display
will go through a ‘Start Up’ checklist and brie y show a sequence of diagnostic codes before
entering into the ‘Operating Mode. It will then display the following information.
Indicate Example
Current DHW temperature
125°F
If the fl ow is present
S24
If fl ame detected
S37
Temperature sign Celsius or Fahrenheit letter
°C or °F
Communication state indicate
°C or °F