Cocoon Cooltech - Solenoid Valves on the Base; Electro-Valves Mounting Screws; EV1 and EV2 Connectors

Solenoid valves on the base
Electro-valves mounting screws
Release the solenoid valve from the base by removing the screws then disconnect it from the tubes.
Disconnect the cable from the CPU.
EV1 and EV2 connectors
Install the new solenoid valve, reconnect the tubes and the cable. Proceed to perform again step 1 to
make sure that the problem is solved.