PMB_SR Microcontroller Internal Fault

What does LED_STA1_PMB_FLASH mean?

The STA1 (PMB_SR) LED on the Cabinet Control Unit, Small Robot (CCU_SR) is flashing, indicating an internal fault within the PMB_SR microcontroller responsible for USB functions. This can prevent proper system operation of the KUKA KRC4 Sunrise Cabinet Med Controller.

• Internal malfunction of the PMB_SR microcontroller.
• Insufficient or unstable power supply to the CCU_SR module.
• Communication error within the CCU_SR module.

Click steps to track your progress.

1. 1

   Verify the infeed at connector X1 for the correct supply voltage (rated voltage 27.1 V).

2. 2

   Observe the PWR/5V LED; if it lights up, suggesting 5V power is present, the CCU_SR module may be defective.

3. 3

   Power cycle the KUKA KRC4 Sunrise Cabinet Med Controller to reset the microcontroller.

4. 4

   If the fault persists after initial checks, prepare to exchange the CCU_SR module as indicated.