Kobelco SR-60 Excavator Error Codes and Troubleshooting Guide

[MikePhua]

Introduction to Kobelco SR-60 Error Codes
The Kobelco SR-60 is a compact excavator equipped with an onboard computer system that continuously monitors the machine’s health and operational status. When the system detects a malfunction or abnormality, it displays an error code on the dashboard. Understanding these codes is essential for timely and cost-effective troubleshooting, minimizing downtime, and ensuring safe operation.
Common Error Codes and Their Meanings

• Throttle Motor Errors (E20, E21): These indicate issues related to the throttle motor’s current or starting point. Symptoms may include irregular engine speed or failure to respond to throttle inputs. Often, the throttle motor may require recalibration or replacement.
  
• Fuel Sensor Failures (H091, H093): Ground short circuit or disconnection of the fuel sensor can trigger engine performance warnings or stalling. Inspection of wiring and connectors is necessary to resolve these faults.
  
• Pressure Sensor Malfunctions (B012-B014, B022-B024): These relate to incorrect output, disconnection, or short circuits in hydraulic pressure sensors tied to boom or arm movements. Hydraulic system checks and sensor replacements may be required.
  
• Relay Failures (R014, R024, R034, R144, R154): Malfunctions in relays controlling components such as wiper motors, flasher systems, or travel arms are indicated here. Testing relay function or replacing faulty relays restores proper electrical operations.
  
• Communication Errors (I111, I113, I313): Errors on the Controller Area Network (CAN) bus or cluster communication suggest wiring or module issues, often requiring professional diagnostics.
  
• ROM Hour Meter Data Issues (A215, A225, A235): These indicate incorrect written data in the hour meter ROM, which can affect accurate tracking of machine use and maintenance schedules.
  

Troubleshooting Approach

1. Read and Document the Error Codes: Use onboard diagnostics or an external diagnostic tool to retrieve active and stored codes.
   
2. Consult Kobelco Manuals or Databases: Cross-reference error codes with manufacturer documentation for detailed descriptions.
   
3. Inspect Physical Components: Check sensor connections, wiring harnesses, fuel system components, and relays corresponding to the error.
   
4. Perform Electrical Tests: Use multimeters and diagnostic scanners to verify voltage, resistance, and circuit continuity.
   
5. Repair or Replace Faulty Components: Based on inspections and testing, address the root cause by repairing wiring, replacing sensors, or resetting relays.
   
6. Clear Codes and Test Equipment: After repairs, clear codes from the system and operate the machine under varied conditions to confirm resolution.
   

Preventive Measures

• Maintain clean and dry electrical connectors to prevent signal loss.
  
• Ensure sensors are correctly installed and calibrated.
  
• Periodically update electronic control modules where applicable.
  
• Perform routine hydraulic inspections to detect early signs of sensor stress or fluid contamination.
  

Glossary of Terms

• CAN Bus: Controller Area Network for electronic communication between vehicle systems.
  
• ROM Hour Meter: Read-Only Memory preserving the machine’s operating hours data.
  
• Throttle Motor: Controls engine speed based on operator input.
  
• Relay: Electrically operated switch controlling power to equipment components.
  
• Hydraulic Pressure Sensor: Device monitoring hydraulic force in cylinders and pumps, essential for safe and efficient machine operation.
  

Conclusion
Interpreting and responding to Kobelco SR-60 error codes is crucial for keeping the excavator in optimal working condition. These codes provide valuable insight into the status of electrical, hydraulic, and engine systems, enabling targeted repairs. With a systematic approach to diagnostics, maintenance teams and operators can reduce unplanned downtime and prolong machine life, supporting productivity and safety on the job.