Display shows E17 and pump stops when connected to certain external devices (e.g., Flowclear chlorinator or heater).

Safety first: Unplug all devices from power before connecting or disconnecting accessories.

Steps:

• 1. Disconnect accessory: Unplug the Flowclear chlorinator, heater, or other accessory from the pump's communication/control port.
• 2. Test pump alone: Power the pump without accessories. If it runs normally, the issue is with the accessory or cable.
• 3. Inspect cable and port: Check the accessory cable for cuts or bent pins. Inspect the pump's communication port for corrosion or damage.
• 4. Verify compatibility: Ensure the accessory model is approved for use with your specific Flowclear pump.
• 5. Replace faulty part: Replace the accessory cable or module if defective. If E17 persists even with known-good accessories, the pump control PCB communication port may need replacement.