L2 - R4.6 Dispense Wrong Volume (Ingredient)

STEP 1 - Verify if the duckbill valve is completely closed when idle.

• Result 1 - The duckbill valve is not completely closed. 
  Start STEP 2.
  
  
• Result 2 - The duckbill valve is completely closed. 
  Start STEP 3.
  
  

STEP 2 - Replace the duckbill valve, fill tube, and make a test drink to verify the quality

• Result - Drinks should be fine, but need to observe for a few days to check that the dripping issue does not occur again. 
  Issue closed. (Root cause: Duckbill valve failure)

STEP 3 - Fill tube and verify if the tube is empty for a bit at the beginning.

• Result 1 - The tube is empty for a bit at the beginning. 
  Educate the customer to fill the tube after the machine is idled overnight.
  Issue closed. (Root cause: Overnight ingredient dripping)
  
  
• Result 2 - The ingredient can be dispensed smoothly all the time. 
  Start "Flowmeter" chapter.

STEP 1 - Replace the flowmeter (see fridge flowmeter SOP / ambient flowmeter SOP here) , and verify flowmeter functionality.

• Result 1 - The flowmeter reading is accurate. 
  Start STEP 2.
  
  
• Result 2 - The flowmeter reading is inaccurate. 
  Escalate to PSE.

2-2-2-2 - Fill tube, and make a drink to verify that the dispense wrong volume issue is resolved.

• Result 1 - The drink can be made with the right volume and taste. 
  Issue close.
  Root cause: The flowmeter fails.
• Result 2 - The dispense volume is still wrong. 
  Escalate to PSE.