F71 Suction pipe blocked
Main motor, oil heater and circulation pump have stopped.
The circuit breakers on the valves on the suction pipe of the pumps indicate that the valves are not quite open.
Check that the valves of the suction line of the pumps are fully open.
Check that the circuit breakers – indicating that the valves are open – functions.
Lethal voltage. Only qualified personnel (12, 19)