During the operation of the OTC DAIHEN Welding Robot, if the system experiences abnormalities such as welding gun half-open/full-open signal conflict, servo out of sequence execution, cooling fan stoppage, welding machine fault, or control board RE-01 low battery voltage, the teach pendant will usually display a hardware and control-level alarm in the 3552 to 3690 range. If these faults are not investigated promptly, they may cause serious operational safety hazards or damage to core components such as the reducer.
To help on-site engineers and mechanics quickly locate problems, we have organized the diagnostic terminology from the official maintenance manual to provide you with the following intuitive fault quick reference table. We recommend using the search function, entering the error code (e.g., 3552), to accurately obtain troubleshooting and processing suggestions.
I. OTC Robot Alarm Code Real-Time Quick Reference Table (3552-3690)
| Alarm Code | Fault Phenomenon | Fault Cause Analysis | Countermeasures & Solutions |
|---|---|---|---|
| 3552 | Half Open and Full Open Signals Are Both ON | The half-open limit signal and the full-open limit signal of the welding gun have a logic conflict and are both ON at the same time. | Confirm whether the half-open and full-open detection limit switches and mechanical actions of the welding gun are stuck or short-circuited. |
| 3553 | Cannot Execute Axis Operation | While the system was in the WI (Welding Instruction) state waiting for pressurization, an axis movement operation was forced. | If axis operation is required during pressurization work, WI should be safely released first before manual operation. |
| 3555 | Servo Welding Gun Not Executed in Sequence | The servo welding gun did not reach the pressure value set by the command or the execution action sequence was wrong. | Please strictly follow the sequence control logic of the welding machine timer. This kind of fault does not require a specific reset operation. |
| 3666 | Cooling Fan Stopped Rotating | The main cooling fan of the control cabinet or power components had a physical failure or stopped running due to power loss. | Cut off the power immediately, check the fan wiring, or directly replace the damaged cooling fan to restore system heat dissipation. |
| 3677 | Minor Welding Machine Error | The welding machine control board detected and generated a general, non-fatal welding error. | Eliminate the cause of the welding fault according to the error content displayed on the welding machine panel, and then reset the exception. |
| 3678 | Welding Exception Reset Not Executed | After the system generated a welding machine error, a new welding machine command was forcefully executed directly without resetting. | Pause the operation, strictly execute the system’s exception reset operation, and clear the previous error state. |
| 3687 | Minor Fault in Welding Machine | The welding machine control board generated a general, minor physical or parameter fault in welding operations. | Troubleshoot and clear the specific cause of the welding machine fault (such as lack of gas, contact tip wear), and then reset the exception. |
| 3688 | Welding Exception Reset Not Executed | Continuously executing welding machine commands without completely resetting the previous fault triggered system protection. | Pause all start commands, and press the reset key on the teach pendant to execute the exception reset operation. |
| 3689 | RE-01 Battery Exception | The data-holding lithium battery on the RE-01 (or main control backplane) failed and was damaged, and can no longer be used. | Refer to the robot maintenance manual procedure, purchase and replace the original backup lithium battery, and restart the controller power. |
| 3690 | RE-01 Battery Voltage Low | The lithium battery on the RE-01 board is about to be exhausted, the voltage has dropped, and core data may be lost at any time. | Refer to the maintenance manual to replace the lithium battery in time, and restart the controller power after eliminating the hidden danger of power loss. |
II. Get Professional Technical Support and Maintenance Services
When the robot frequently displays the above hardware-level alarms, and routine reset attempts are ineffective, do not forcefully pull the robot arm or repeatedly force restarts, so as not to cause secondary irreversible damage.
Contact Anhui Oujie for Technical Guidance
- System Recovery & Hardware Repair: Manager Fang
- Service Hotline (WhatsApp): 180-9663-1656
- Official Email: ahojotc@gmail.com