TIP
If leakage is observed around the purge valve knob (when the purge valve is open) or on the purge outlet (when the purge valve is closed), the purge valve knob may be defective (see Replacing the Purge Valve Knob).
When
The leak sensor is wet. The leak sensor reports leakage.
If leakage is not resolved after 3 minutes, the pump stops the flow.
Parts and additional items required
Replacement part as required
Cloth or tissue
Preparations
When resolving leakage, observe the safety guidelines and general rules for maintenance and service as presented in Maintenance and Service.
Follow these steps
Locate the source of the leak.
As leakage usually occurs at a connection, visually inspect all components and connections in the flow path.
The following tests can help you to identify the source:
Leakage test for the seal wash system
See Testing the Seal Wash System for Leakage.Leakage test for the piston seals
See Testing the Piston Seals for Leakage.Leakage test for the entire pump
See Testing the Pump for Leakage (General Test).
After taking remedial action as required, proceed with the next steps.
With a cloth or tissue, thoroughly absorb all liquid that has collected in the leak tray and under the leak sensor. Be careful not to bend the sensor.
Allow the sensor to adjust to the ambient temperature for a few minutes.
If leakage is no longer reported, you can resume operation.