Regulator Motor Remaining on
Hello folks.
I am back again in need to assistance with a Mallard. For the past two days the loco has been running fine. Her low water sensor tripped and I went ahead and refilled its boiler. As soon as I put power back on the regulator motor kicked on and would not stop. The only time this would change is if I input a command. Upon inspection it looks like the wiper board needs to be replaced as it has warped and the red lead has an exposed section near the superheater. The gears, regulator linkage and everything else mechanically seem to be fine.
Thank you all for your help and have a good one.
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In most cases this is the reason for uncontrolled servo motor running:
The voltage drop on feeder cable or track is too high. This causes the relay in the loco cab to drop out and connect the motor to the track voltage.
>> Check cabling and connectors.
Of course it could be a problem on the relay board. But this seems to be alive from what you describe.