Code PGo (Alarm): PG Disconnect (for Control Mode with PG)
Issue Description & Safety Warning
The Yaskawa A1000 AC Drive has triggered a critical PG Disconnect (for Control Mode with PG) alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Code type: Alarm / minor fault Manual section: Yaskawa A1000 Troubleshooting PG cable is disconnected. Reconnect the cable. PG cable wiring is wrong. Correct the wiring. PG encoder does not have enough power. Make sure the correct power supply is properly connected to the PG encoder. Brake is holding the PG. Ensure the brake releases properly
Source: Yaskawa AC Drive A1000 High Performance Vector Control Drive Technical Manual (SIEP C710616 21H)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Yaskawa A1000 AC Drive Alarms
Yaskawa controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code PGo (Alarm) on the A1000 AC Drive identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Yaskawa's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 280 Yaskawa A1000 AC Drive codes.
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