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Errors


Boiler type Bimini BWC120

Error code b18

Cause:

 

MCBA supply sensor detected temperatures in excess of 200°F. 

Solution:

 

• Heating load at time of error was far below the minimum firing rate of the boiler.
• Defective primary pump or no flow in primary loop (Piping Method 1).
• Control system miswired so that boiler operation is permitted when no zones are       calling.