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Storingen


Ketel type MPO-IQ115

Storingscode Err4

Oorzaak:

Burner Output (B1) Fault

 

Oplossing:

B1 output sensed powered during safety output relay check sequence or unpowered during running, or powered in idle in combination with water temperature above 264°F limit. Cycle power to the control. Replace control if problem persists.