There is a leak in the Water Circuit. Replace O-Rings and hoses as necessary.
Replace Membrane Regulator (Most Common). Often times, the water pump will become increasingly noisy due to a blockage inside the Membrane Regulator, which in turn, prevents the required pressure to maintain a uniform flow of water throughout the machine from passing through the regulator.
The Water Pump is filled with scale/mineral deposits, which prevents the pump from operating. Replace the Water Pump.
Indicates a blockage in the Water Circuit, preventing the free flow of water. Replace blocked components (valves/connectors/tubes/hoses) as necessary.
The Flowmeter may need to be cleaned or replaced. Open the top of the Flowmeter by turning the top counterclockwise to clean the inside.
The Solenoid Valve may be clogged with scale. If the Solenoid Valve connects the pressure hoses via a Legris Connector (Push Connect), then these can be removed and cleaned or replaced.
If the Solenoid Valve connects the pressure hoses via a Hair Pin Clip connection, then the entire valve needs to be replaced.
