Warning/Alarm 72, 84, 155, 157 — Internal electronic fault

What does 72, 84, 155, 157 mean?

There is an internal fault within the pump's electronics system. The pump may automatically reset and restart once the fault is cleared.

• Component failure within the pump's electronics.
• Software issue or internal electronic malfunction.

Click steps to track your progress.

1. 1

   If the pump does not reset automatically, try cycling the power off and on at the main switch.

2. 2

   Check for any recent system changes or external electrical disturbances that might have affected the pump.

3. 3

   If the fault persists after a power cycle, replacement of the pump or assistance from GRUNDFOS SERVICE is needed.