BRITISH FIRE MANUFACTURERS

E19,20,27,50,54,57,58,59,60,61 - Meaning

Occurs when internal CPU diagnostics runs self tests and returns invalid results


Possible reason:

  • EMC problems (in this case, twist ignition cable around thermocouple wire several times to quench radiated EMC emissions)
  • Electrode spark is tracking out somewhere but not at electrode creating unusual interference
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