tstone
Member
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- Westminster/MD
I've had trouble with several of my MBU's (Modern Burner Units) shutting down after about 40 minutes of operation.
When the failure occurs the trouble code on the display reads ER01 (Error 01) which indicates "Flame Out". I pulled the flame sensor to test it and get no voltage out of it or any resistance across any of the terminals with or without a strong light on the CAD cell. My experience with CAD cells on commercial equipment is that they produce about a 12 millivolt supply to activate the controls when a light is is applied to the cell.
My TM does not have an electrical schematic so I am having difficulty trying to figure how the flame sensor interacts with the control module.
I tried testing a flame sensor from a MBU that I know is in working condition and get the same results.
Has anyone else tried to troubleshoot this problem?
Thanks,
Tom
When the failure occurs the trouble code on the display reads ER01 (Error 01) which indicates "Flame Out". I pulled the flame sensor to test it and get no voltage out of it or any resistance across any of the terminals with or without a strong light on the CAD cell. My experience with CAD cells on commercial equipment is that they produce about a 12 millivolt supply to activate the controls when a light is is applied to the cell.
My TM does not have an electrical schematic so I am having difficulty trying to figure how the flame sensor interacts with the control module.
I tried testing a flame sensor from a MBU that I know is in working condition and get the same results.
Has anyone else tried to troubleshoot this problem?
Thanks,
Tom