Troubleshooting P44x/EN TS/Hb6MiCOM P40 Agile P442, P444 (TS) 11-51 INTRODUCTIONBefore carrying out any work on the equipment, the user should be familiar with thecontents of the Safety Section/Safety Guide Pxxx-SG-4L-2 or later issue, the TechnicalData chapter and the ratings on the equipment rating label.The purpose of this chapter is to allow an error condition on the relay to be identified so thatappropriate corrective action can be taken.Should the relay have developed a fault, it should be possible in most cases to identify whichrelay module requires attention. The Maintenance chapter (P44x/EN MT) advises on therecommended method of repair where faulty modules need replacing. It is not possible toperform an on-site repair to a faulted module.In cases where a faulty relay/module is being returned to the manufacturer or one of theirapproved service centres, the Repair/Modification Return Authorization should be included.