Error Code Identification - Steam Series
Steam Line Errors
Brew Temp AL1:
Group temp probe is interrupted or disconnected. Stops heating group. Check that the thermistor is connected, Molex pins are in place and wires are snug.
Brew Temp AL2:
Group temp probe has a short circuit. Stops heating group. Check thermistor in group, see if wires are pinched or cut, shorting against each other.
↑STM:
Filling timeout after four minutes. Stops heating machine. Check water path to machine.
STM AL1:
Transducer is disconnected or interrupted. Check connections at the board, check Molex pins are in place and wires are snug.
STM AL2:
Transducer is over pressure. Check that the machine has not overfilled, identify if there is a leak in the inlet solenoid. Possible runaway SSR is overheating the steam tank.
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