A1000

Why A1000 belongs in a diagnostic database

Yaskawa A1000 is a high-performance vector-control drive family used in demanding motor-control applications. The official manual already offers substantial fault diagnosis and records fault trace/history through U2 and U3 monitor groups. That creates a strong starting point, but the user who sees SC or GF still needs to decide whether evidence points to motor/cable failure, output semiconductor damage, gate supply or current-sensing/protection circuitry.

The reviewed A1000-22KW DB1–DB5 circuit set adds exactly that internal mapping layer. DB1 maps feedback-regulated auxiliary conversion, isolated rail groups and fan/relay support. DB3 maps voltage-monitoring and connector paths. DB4 exposes CT1–CT3 current channels, analogue supply rails and comparator/reference circuitry.

Fault entry routes

How the circuit record changes diagnosis

When a user arrives with SC, many public pages say to disconnect the motor and check the IGBT. That is necessary but incomplete after destructive failures. The five-sheet circuit map shows supply rails and current-feedback channels that can produce or contribute to protection behaviour. A collapsed rail, biased reference or damaged comparator path must be considered before a new power device is risked.

Equally, internal drawings do not justify ignoring official fault logic. GF still starts with safe external insulation separation; SC still demands power-stage caution; stored trace data must be captured before the technician erases the most useful evidence.

Support and repair decision

A useful A1000 inquiry provides full type code, power/voltage class, fault trace/history, whether motor/cable isolation changes the symptom, photographs of board/module labels and any prior semiconductor or board repairs. That information indicates whether the next action is field-side wiring correction, board-level evaluation, power-stage repair or replacement planning.

• Capture U2 fault trace and U3 history before reset
• Identify exact 22 kW board/drawing applicability or physical revision
• Separate external insulation failure from internal power stage
• Do not sacrifice another IGBT to an unverified driver/sensing path

From official protection event to board-level case

The A1000 technical manual provides the authoritative first layer: protection records and troubleshooting distinguish overcurrent and ground-fault conditions and preserve recent fault information. The owned 22 kW drawing record provides the second layer: a technician can map the supply, measurement and protection structures that matter once external wiring or motor causes are no longer adequate explanations.

This two-layer method is stronger than copying a fault table. It keeps the official code meaning intact while giving an industrial owner a route to a repairable board or module decision. It is especially relevant after an internal failure or an unsuccessful replacement, when a generic reset instruction is no longer responsible.

What will be expanded when demand appears

The first A1000 cluster is intentionally centred on SC/GF-style output protection and the reviewed 22 kW drawing set. Future content should be triggered by observed queries and cases, such as a consistent demand for undervoltage, fan/thermal problems or specific board identifiers. That approach increases the density of useful pages without diluting the database into a generic fault-code directory.