Maintenance
4-21
7
1
2
3
4
5
4.5
CORRECTIVE MAINTENANCE
4.5.1
Organisation
Corrective maintenance involves two types of procedure:
• fault location (A Sheet),
• replacement (E Sheet).
A Sheets are used to identify a failed sub-assembly following notification of a fault (alarm
message, red LED on, etc.).
E sheets are used to replace the defective sub-assembly.
A sheets are described in Section 4.5.2.
E sheets are described in Section 4.5.3.
If a fault cannot be located, the operator should contact the manufacturer's customer
support service.
4.5.2
A Sheets (fault location)
4.5.2.1
Description of A Sheets
A sheets all have the same format (see Figure 4.3 and Figure 4.4).
