Code SPOT-050: Bad Pressure (EP=*) %s
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical Bad Pressure (EP=*) %s 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
Cause: An invalid binary equalization pressure was programmed in the teach pendant program. Remedy: In the teach pendant program, check the equalization pressure spot welding instruction EP= value. Note: The smallest valve pressure allowed is 0. For digital weld controllers, the largest pressure number allowed depends on the width of the Equalization Pressure group output. If this GOUT is 4 I/O points wide, then the maximum pressure is 15. If the GOUT is 5 I/O points wide, then the maximum pressure is 31. For serial weld controllers, the maximum pressure is 15. Re-program the EP= value in the teach pendant program.
Source: FANUC Robot R-30iA Alarm Code List Operator's Manual
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Fanuc R-30i Series Robot Controller Alarms
Fanuc controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code SPOT-050 on the R-30i Series Robot Controller identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Fanuc's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 6553 Fanuc R-30i Series Robot Controller codes.
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