Error codes (MOS572) define the major failures that can happen against a piece of equipment.
For example, major failures against a simple conveyor can be:
The failure is given a code followed by a description.
Error codes are linked to equipment but are then sub-divided into the main causes of failure. These failures are described further in the section on Error Code 2.
Error codes form part of the diagnostics section of M3 Maintenance and are used as part of maintenance philosophies such as Reliability Centered Maintenance (RCM).