Bell and Gossett E11

What does Bell and Gossett E11 mean?

E11 is a lack-of-water error on the e-90E Smart Pump. It activates when the dry-run protection input (LOW terminals) opens and parameter P48 is set to ERR mode. The pump shuts down immediately to prevent mechanical seal and impeller damage from running without fluid. The error clears automatically when the LOW input switch closes again.

Symptoms

• Pump stops and displays E11 on the control panel.
• STATUS LED illuminates red steady.
• External float switch or dry-run sensor has opened its contact.
• Pump restarts automatically once the LOW input switch closes and water is restored.

Common causes

• Water level in the supply tank or reservoir has dropped below the sensor setpoint.
• Dry-run float switch or electronic sensor has failed in the open position.
• Wiring to the LOW+ and LOW- terminals (pins 13–14 on single-phase, pins 12–11 on three-phase) is broken or disconnected.
• Parameter P48 set to ERR but no dry-run sensor is actually installed, leaving the terminals open.

Diagnostic steps

1. 01

   Check water level in the supply tank

   Verify that the source water supply is adequate and the tank or reservoir is filled above the sensor activation point. Refill or restore supply flow if low.

2. 02

   Inspect the dry-run sensor and switch

   Test the float switch or electronic sensor connected to terminals LOW+ and LOW-. Confirm it closes when immersed and opens when dry. Replace a faulty sensor before restarting.

3. 03

   Check wiring to LOW terminals

   Inspect the wiring between the sensor and the LOW+ / LOW- pump terminals for open circuits, loose connections, or damaged insulation. Re-terminate any loose wires.

4. 04

   Verify P48 parameter setting

   Access parameter P48 on the display. If no dry-run sensor is installed, set P48 to DIS to disable the LOW input. If a sensor is installed and functioning, confirm P48 is set to ERR (default) for protective shutdown behavior.

When to call a professional

Call a plumber or licensed technician if E11 persists after restoring water supply and confirming the sensor is functional. Repeated dry-run trips can indicate a supply system problem — such as a failing feed pump, closed isolation valve, or undersized storage tank — that requires hydraulic system analysis beyond pump servicing.