CCU_SR 3.3V System Power Supply Failure

What does LED_PWRS33V_OFF mean?

The PWRS/3.3V LED on the KUKA KRC4 Sunrise Cabinet Med Controller is OFF, indicating that there is no 3.3V supply voltage present for the CCU_SR module. This critical power absence can prevent the entire CCU_SR module from functioning.

• Blown fuse F17.3, which protects the 3.3V system power supply.
• Internal power supply regulation failure within the CCU_SR module.
• Other power supply issues affecting the 3.3V rail for the CCU_SR.

Click steps to track your progress.

1. 1

   Check fuse F17.3 on the Cabinet Control Unit, Small Robot (CCU_SR) and replace if defective.

2. 2

   Observe the PWR/3.3V LED on the CIB_SR; if it lights up, yet PWRS/3.3V is off, this suggests a fault within the CCU_SR module itself.

3. 3

   Perform a system power cycle to attempt to reset the power supply.

4. 4

   If the fault persists after these checks, prepare to exchange the CCU_SR module.