P44x/EN TS/Hb
P442, P444 (TS) 11-
1 INTRODUCTION
Before carrying out any work on the equipment, the user should be familiar with the
contents of the Safety Section/Safety Guide Pxxx-SG-4L-2 or later issue, the Technical
Data 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 that
appropriate corrective action can be taken.
Should the relay have developed a fault, it should be possible in most cases to identify which
relay module requires attention. The Maintenance chapter (P44x/EN MT) advises on the
recommended method of repair where faulty modules need replacing. It is not possible to
perform an on-site repair to a faulted module.
In cases where a faulty relay/module is being returned to the manufacturer or one of their
approved service centres, the Repair/Modification Return Authorization should be included.
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