Kuka · KR C4 Controller
This fault indicates an overtemperature condition on the heat sink of a KPP or KSP drive unit for an axis. Prolonged high temperatures can degrade component lifespan and lead to drive shutdown.
Click steps to track your progress.
Check cabinet fan for proper operation and air flow.
Measure ambient temperature around the KPP/KSP cabinet.
Inspect cooling circuit for dirt or obstructions and clean as necessary.
Verify installation site for adequate ventilation slits and clearance.
Reinitialize the drive bus by cycling Power Off / Power On.
Check the KSP module for any other anomalies.