P20B9-00
JCB P20B9-00: Error for open load on heater relay of backflow line
Issue description
The system has detected an error related to an open load on the heater relay of the backflow line. This indicates that the circuit associated with the heater relay is not functioning as expected, potentially due to a break or disconnection in the circuit.
Check the cause
The heater relay of the backflow line
The circuit connected to the heater relay of the backflow line
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