E07 error and unit stuck in regeneration position

Safety: Disconnect power and isolate the softener with inlet and outlet valves. Open a tap to relieve pressure.

• Remove valve head: Follow Idrobase instructions to remove the control valve head from the resin tank. Place it on a clean bench.
• Disassemble piston assembly: Carefully remove the piston/rotor and seal pack. Note the order of seals and spacers.
• Inspect components: Look for torn O-rings, swollen seals, or scoring on the piston. Remove any resin beads or debris lodged in ports.
• Clean and lubricate: Clean all parts with clean water. Lightly coat seals and O-rings with silicone-based lubricant approved for potable water.
• Reassemble correctly: Reinstall the seal pack and piston in the correct orientation. Ensure the piston rod engages the motor cam properly.
• Test travel: Before pressurizing, manually rotate the cam to move the piston through all positions. It should move smoothly without binding. Reinstall the valve head and test regeneration.