INVT GD270 OH1 – Rectifier module overheating

Diagnostic context

What OH1 means on INVT GD270

OH1 identifies overheating of the GD270 rectifier module. The manufacturer table points to blocked airflow, fan failure, high ambient temperature and prolonged overload operation.

Operating context: Start with the cooling path and ambient conditions. If ventilation and fan operation are normal, review whether the drive has been running under sustained overload.

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

Possible causes

Air duct blocked or fan damaged.
Ambient temperature too high.
Long-time overload running.

Recommended checks and actions

Ventilate the air duct or replace the fan.
Lower the ambient temperature.

Technical source

INVT GD270 Manual EN - Fault OH1 — page 278