ABB LWT300 series User Manual

Also see for LWT300 series: Quick start guide Quick start guide User guide Quick start guide

Contents

ABB LWT300 series User Manual Manual pdf 71 page image

—C h a p t E R 9Maintenance and troubleshootingLWT instruments are designed to withstand many industrial environmental conditions.They contain no moving parts and, aside from the probe, no field-replaceable parts. For this reason, noregular maintenance is required to keep the instrument in compliance.Additionally, no user/operator adjustments inside LWT instruments are necessary or recommended byABB. Service tasks that are not explained in this documentation are to be performed at the factory byqualified service personnel only.Contact ABB for any additional information, or in the event of specific problems not covered in this userguide.NOTICEOpening the instrument for any reason other than the procedures indicated in thisdocumentation voids the warranty.NOTICESince the instrument may form part of a safety chain, ABB recommends replacing theinstrument immediately if any defects are detected.Diagnosing problemsIf the LWT instrument is malfunctioning in any way, the LCD displays specific event messages destinedto help you identify and understand the situation.When an event happens, a message consisting of an icon and text appears at the bottom of the LCD.—Figure 42 LCD before and during an errorBefore an error During an errorError text and iconThis short message gives you a quick indication of the nature of the situation at hand. The text besidethe icon provides information about the potential source of the problem.All these text messages are saved in a diagnostic history. You can browse through this diagnosticshistory and clear this history when all events have been accounted for.