Hi everyone. I have a 433 HC with the following problem: when the steam boiler starts to filling, when reaches the hight probe stops, and the contactor is energized and start to heat up. At this point is normal, but, the problem starts a few minutes after, when suddenly the led FAULT in the control board of the boiler light up and turn off the contactor, then light off and the contactor is energized, and then the FAULT led is light up and cuttoff the contactor and the situation goes on and the steam is not produced. What do you think the problem is? Thanks in advance
Wed Jul 14 2021
Problem with steam boiler 433HC
Thu Jul 15 2021Reply from Chris35
Try disconnecting the leak detection probe from the board and see if it clears the issue.
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Thu Jul 15 2021Reply from Sal Reyes
Hi Chris, thank you for responding me... the leak detection probe, is that the service manual calls spill probe? The one that is connected to the pan, or is the lowest probe wich is connected to the little board? The steam boiler is a CAS 30 (the one with the vertical water deposit)
Thanks
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Thu Jul 15 2021Reply from Chris35
Yes, the short probe mounted just above the drip pan. It is there to detect a leak and shut down to prevent flooding. I've had them short in the wiring or have a piece of the foil insulation ground out the probe and cause the fault light.
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Thu Jul 15 2021Reply from Sal Reyes
Fri Jul 23 2021Reply from Sal Reyes
Hi Chris and everyone who is reading, I disconnected the leak probe, and the fault continues, but, when I disconnect the Hi probe (which is connected to the same connector in the board with the leak probe) the fault is cleared and the boiler works. However, with the hi probe disconnected, the boiler will not be able to control the filling, right? So, what do you think?
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