Grundfos Grundfos Pump Error Code 18

Grundfos Pump Critical System

Model: Grundfos Pump | Code: 18

Applicable Systems
MAGNA1

Symptoms

RAM fault. The controller system RAM has a fault and cannot operate reliably.

Possible Causes

  • RAM chip hardware failure
  • Memory corruption from electrical disturbance

Troubleshooting Steps

  1. Step 1: Power-cycle the controller and check if the error clears
    If the error persists, RAM is defective
  2. Step 2: Replace the controller if the fault is permanent
    New controller operates without error

How to Reset

To reset: Power-cycle the controller. If the error persists, replace the controller.

Related Grundfos Fault Codes

Source: Grundfos Pump Troubleshooting Guide, Grundfos Group

Category: Pump