231-C005

Check Hardware/Software Compatibility

Access MOD function, navigate to System Info menu, and compare CC hardware revision with NC software version compatibility matrix in technical documentation.

Document both versions before contacting Heidenhain support for compatibility verification

Verify NC Software Version

In MOD mode, select 'System' → 'NC Software' to display current software version and build date.

Do not attempt software downgrade without proper backup and Heidenhain authorization

Review Recent Updates

Check maintenance logs for recent NC software updates that may have created incompatibility with existing CC hardware.

Always verify hardware compatibility before performing NC software updates

Contact Heidenhain Support

Provide CC hardware revision and NC software version to Heidenhain technical support for compatibility assessment and upgrade path recommendation.

Inspect Power Supply Connections

Power down system and inspect UV/UVR module connections for loose cables, corrosion, or damaged connectors affecting I2C bus integrity.

Always follow lockout/tagout procedures before accessing electrical components

Check I2C Bus Voltage Levels

Using oscilloscope, measure I2C SDA and SCL line voltage levels at CC controller during power-up sequence to identify interference patterns.

Normal I2C levels should be 3.3V or 5V depending on system configuration

Isolate Power Supply Modules

Temporarily disconnect UV/UVR modules one at a time to identify which module is causing I2C interference.

Ensure proper ESD protection when handling electronic modules

Replace Faulty Power Module

Replace identified faulty UV/UVR module with known good unit and verify I2C communication restoration.

Perform CC Controller Diagnostics

Access diagnostic mode through MOD function and run built-in CC hardware self-test routines to identify internal faults.

Document all error codes and test results for technical support reference

Check CC Module Seating

Power down system and reseat CC controller module in its slot, ensuring proper connector engagement and locking mechanisms.

Handle CC module with proper ESD precautions and avoid touching connector pins

Verify CC Power Supply

Measure DC voltage levels at CC controller power input pins according to electrical schematic specifications.

Check both primary and standby power rails for proper voltage and ripple levels

Replace CC Controller

If diagnostics confirm CC hardware failure, replace controller unit with compatible hardware revision and transfer configuration data.

Backup Current Configuration

Use MOD function to create complete system backup including machine parameters, PLC program, and configuration data before attempting recovery.

Always create backup before performing any configuration recovery procedures

Reset Hardware Configuration

Access MOD → 'System' → 'Hardware Config' and perform hardware detection sequence to rebuild CC controller identification data.

Allow complete detection cycle to finish without interruption

Restore from Known Good Backup

If available, restore system configuration from previously saved backup when CC controller was functioning properly.

Verify backup date corresponds to period when system was operating without alarms

Verify System Operation

Perform complete system startup sequence and verify CC controller recognition without alarm recurrence.