With amplifier and hardware alarms, separate external causes from internal ones first: clogged filters, missing phase, loose connectors - cleaning and re-seating solves these at almost zero cost. Only after external causes are ruled out do we judge boards and power stages. This page lists every hardware code and that outside-in order.
The amplifier and drive hardware itself plus its periphery: boards, fuses, cooling, supply, connectors and self-test control-side signal -> amplifier board (drive and sense circuits) -> fuses and supply -> cooling -> motor-side output
Inspection line: read the amplifier status code and indicators first, then measure supply, fuses and cooling path
Spares we carry: we carry fuses, filter mats, common connectors and terminals; boards are stocked by type or go through the repair channel
FANUC 18
