Fault code

INVT GD20 LL Underload fault

Diagnostic context

What LL means on INVT GD20

LL is the GD20 underload fault. The manufacturer associates this fault with the inverter will report the underload pre-alarm according to the set value.

Operating context: Start with the manufacturer troubleshooting step: Check the load and the underload pre-alarm point.

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

Possible causes

  • The inverter will report the underload pre-alarm according to the set value.

Recommended checks and actions

  • Check the load and the underload pre-alarm point.

Technical source

INVT GD20 Manual EN - P07.27 Current fault type — page 62

INVT GD20 Manual EN - Fault tracking — page 96

Manual tiếng Việt INVT GD20 - Xử lý lỗi — page 85