microWIU™ - Alstom

5. SECTION 5 – PREVENTIVE MAINTENANCE ................................................. 5–15.1. GENERAL ................................................................................................... 5–16. SECTION 6 – TROUBLESHOOTING............................................................... 6–16.1. GENERAL ................................................................................................... 6–16.2. GENERAL TROUBLESHOOTING .............................................................. 6–16.3. LEDS ........................................................................................................... 6–26.4. HARDWARE FAULT ERROR CODES ....................................................... 6–27. SECTION 7 – CORRECTIVE MAINTENANCE ................................................ 7–17.1. GENERAL ................................................................................................... 7–17.2. UNIT REMOVAL.......................................................................................... 7–18. SECTION 8 – PARTS CATALOG .................................................................... 8–1A. APPENDIX A – TYPICAL APPLICATION CIRCUITS ..................................... A–1A.1. APPLICATION CIRCUITS .......................................................................... A–1A.2. MASTER/SLAVE CONNECTIONS ............................................................ A–7P2525, Rev. 3, Sep/12 ii Alstom Signaling Inc.