INVT GD270 OUt1 – Inverter unit U-phase protection

Diagnostic context

What OUt1 means on INVT GD270

OUt1 identifies inverter unit U-phase protection on the GD270. The manufacturer table lists acceleration that is too fast and a damaged IGBT module as the associated causes.

Operating context: This fault is specific to U-phase inverter-unit protection. The official checks are limited and direct: review acceleration time and the power unit condition.

This diagnostic context is an editorial explanation. The possible causes and recommended checks below are the verified manufacturer troubleshooting content.

Possible causes

ACC too fast.
IGBT module is damaged.

Recommended checks and actions

Increase ACC time.
Replace the power unit.

Technical source

INVT GD270 Manual EN - Fault OUt1 — page 276