2-1 Dispense Warning

2-1-1-1 - Start pumping the malfunctioning pump, and measure the voltage at the motor board connector for the corresponding pump. The expected reading should be 24V

• Result 1 - The reading is 24V. 
  Start 2-1-1-3.
  
  
• Result 2 - The reading is not 24V. 
  Start 2-1-1-2.

2-1-1-2 - Replace the motor board (see SOP here) and verify pump functionality.

• Result 1 - The pump works fine. 
  Start 2-1-1-5.
  Root cause: The motor board fails.
  
  
• Result 2 - The pump is still not working.
  Escalate to manager (machine swap).

2-1-1-3 - Inspect the pipeline for leaks that may reduce pump extraction efficiency.

• Result 1 - There are leaks. 
  Start 2-1-1-4.
  
  
• Result 2 - There are no leaks. 
  Start 2-1-2-1.

2-1-1-4 - Seal the leaks as follows, make sure no leaks, and start 2-1-1-5.

Pipeline rupture: Replace the damaged section of the pipeline.

Incomplete connection sealing: Properly install the pipeline and clamps to their designated positions (following the Standard Operating Procedure - SOP).

2-1-1-5 - Make a drink to verify the resolution of the dispensing warning issue.

• Result 1 - No dispense warning pops up. 
  Issue close. (If the issue is closed after completing 2-1-1-4, the root cause for your case is tubing leaks)
  
  
• Result 2 - Dispensing warning still happens.
  Start checking 2-1-2-1.

2-1-2-1 - Swap the problematic flowmeter plug with a functional one on the flowmeter board. Simultaneously dispense from both tubes and verify if readings are shown on the touchscreen.

• Result 1 - The problematic flowmeter is still unreadable. 
  Start 2-1-2-3.
  Root cause: the flowmeter fails
  
  
• Result 2 - Problematic flowmeter becomes readable. 
  Start 2-1-2-2.
  
  

2-1-2-2 - Replace the flowmeter board (see SOP here), and verify flowmeter functionality.

• Result 1 - The flowmeter is readable now. 
  Start 2-1-2-4.
  Root cause: the flowmeter board fails 
  
  
• Result 2 - The flowmeter is still unreadable.   
  Start 2-1-2-3.

2-1-2-3 - Replace the flowmeter (see SOP here), and verify flowmeter functionality.

• Result 1 - The flowmeter is readable now. 
  Start 2-1-2-4.
  Root cause: the flowmeter board & flowmeter fail.
  
  
• Result 2 - The flowmeter is still unreadable.   
  Escalate to FAE.

• Result 3 - The flowmeter is not replaceable due to harsh/tiny work space.   
  Escalate to manager (machine swap).

2-1-2-4 - Fill tube, and make a drink to verify the resolution of the dispensing warning issue.

• Result 1 - No dispense warning pops up. 
  Issue close.

• Result 2 - Dispensing warning still happens.
  Escalate to FAE.