ABB NTLS01 Line interface module

To be performed only by qualified service personnel. Prior to removing the cover, refer to Section 1.2, page 1 for safety warnings. 6.2 INTRODUCTION This section provides a troubleshooting guide, module replacement procedures and a calibration procedure. The troubleshooting guide addresses the most common symptoms and their causes. The replacement procedure outlines the removal and replacement of the Field Replaceable Units (FRUs). The calibration procedure outlines the adjustment of the A100 board. Whenever any troubleshooting, replacement or calibration is done, the schematics and components listed in section 6.10 should be used for reference.

A100 board failure

inverter failure or neutral disconnected on 380, 414, 480 Vac input models, or OVP fired. NOTE: When remote is OFF, control failure will be ON. This is a normal condition.AC line low or phase/neutral is disconnected.Inverter failed (replace inverter), check diodes on output assembly.Check address switch.Input rectifier failed or inverter failed Wires to voltage or current pots are disconnected. Voltage or current pot is broken.

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