Code SRVO-233: TP OFF in T1,T2/Door open
Issue Description & Safety Warning
The Fanuc R-30i Series Robot Controller has triggered a critical TP OFF in T1,T2/Door open 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: The mode switch is set in the T1 or T2 position, and the teach pendant is disabled. Alternatively, the controller door is open. There is also a failure in the hardware. Remedy: 1. After setting the teach pendant enable/disable switch to on, close the controller door, and press the reset key. 2. If this alarm cannot be reset, refer to the Controller Maintenance Manual for more information.
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 SRVO-233 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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