What does the key pattern of powofo wall-hung boiler mean?

Stop working. Powofo wall-hung boiler key pattern indicates that the wall-hung boiler has stopped working. A key icon appears on the wall-hung boiler, indicating that the wall-hung boiler has been locked and stopped working. Wall-hung boiler is the abbreviation of gas wall-hung boiler, and its full name is "gas wall-hung boiler", which is a water heater with natural gas as energy source.