GSK GS2000T Series Error Err-21: Open phase of power supply alarms

AC servo drive unit · taken from the manufacturer’s manual, pages cited

Fault codeErr-21

Open phase of power supply alarms occur when 3-phase input power supply is missing one phase. The manual's first action is: “Check the input power supply.”

Model
GSK GS2000T Series
Display shows
Open phase of power supply alarms (Err-21)
Type
Fault code
Source
Manual p. 122

What Err-21 means

Open phase of power supply alarms p. 122

Common causes

  • 3-phase input power supply is open phase. p. 122

What to do

  1. Check the input power supply. p. 122

If Err-21 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact GSK service.

Open the manual at page 122 All GS2000T Series error codes Manual details & download

This page summarises what the manufacturer’s manual says about Err-21; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with GSK. Found a mistake? Report an error.