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TROUBLESHOOTING
Quick solutions to common issues
Most espresso and machine issues can be solved with small adjustments or simple checks.
Use this guide to quickly identify the problem and apply the recommended solution.
If the issue persists, our support team is always ready to help.
Espresso issues
After your coffee sessions
These basic steps take less than one minute and make a big difference in machine performance.
Coffee too fast
Symptoms:
Extraction finishes too quickly (less than about 20–22 seconds)
Coffee looks watery
Weak body
Sour taste
Most common cause:
Grind size too coarse.
Solution:
Grind finer and try again.
If the problem continues:
Check that your dose is correct (example: 18g).
Make sure you are tamping evenly
Verify coffee freshness (old coffee extracts faster)
Coffee too slow
Symptoms:
Extraction takes too long (over about 35 seconds)
Dripping instead of flowing
Very dark extraction
Bitter taste
Most common cause:
Grind too fine.
Solution:
Grind slightly coarser and try again.
If needed:
Check dose is not too high
Make sure coffee is not overdosed for the basket size
Channeling
Symptoms:
Spraying coffee
Uneven flow
Extraction from one side
Inconsistent crema
Most common cause:
Uneven distribution
Uneven tamping
Grind too coarse
Solution:
Distribute coffee more evenly before tamping
Tamp level
Try slightly finer grind
Use fresh coffee
No crema
Symptoms:
Little or no crema
Flat looking espresso
Most common cause:
Old coffee
Coffee stored improperly
Grind too coarse
Solution:
Use fresh coffee (recommended within 4–6 weeks of roast date)
Store coffee in airtight container
Adjust grind slightly finer
Machine issues
Machine not heating
Possible causes:
Machine still warming up
Safety protection active
Connection issue
Solutions:
Wait full warmup time (5–8 minutes)
Restart the machine
Check power connection
If problem persists contact support.
No water flow
Possible causes:
Empty water tank
Tank not properly inserted
Pump protection triggered
Solutions:
Check tank water level
Reinsert water tank
Restart machine
Run a blank shot
If issue continues contact support.
Strange noise
Possible causes:
Pump running without water
Air in system
Tank not fully inserted
Solutions:
Check water tank level
Reinsert tank correctly
Run a short water flush
If noise continues after checks, contact support.
Connectivity issues
App connection problems
Solutions:
Make sure Bluetooth is enabled
Restart the app
Restart the machine
Move phone closer to machine
Check for firmware updates
If pairing fails:
Remove device from app and reconnect.
Scale connection problems
To clean:
Make sure scale is charged
Enable Bluetooth
Restart scale
Reconnect from machine settings
Move scale closer to machine.
Error codes
Understanding error messages
Kubo includes internal protection systems designed to prevent damage and ensure safe operation.
If an error appears, the machine will usually indicate the cause.
E01
General protection error.
Solution:
Restart machine.
If error repeats contact support.
E02
Sensor related warning.
Solution:
Restart machine.
Allow full warmup.
Contact support if persistent.
E03
System safety protection.
Solution:
Turn machine off
Wait 30 seconds
Restart
If repeated contact support.
Still need help?
Contact Kafmasino support
If your issue is not listed here or you cannot solve the problem, our support team will be happy to help.
Please include:
Machine model
Description of the issue
Photos or video if possible
Error code if shown
Contact:
We aim to respond as quickly as possible.