Question 1

What does error code Red Exclamation Mark / Jammed Brew Group u DeLonghi / Philips / Krups and how to fix it?

Accepted Answer

Brew group cannot be removed or binds mechanically. Repair procedure: Turn the coffee machine off and on to reset the drive carriage, rinse the brew unit in lukewarm water, and lubricate the piston with food-grade silicone grease!

Question 2

What does error code Coffee machine hums loudly but no water flows (Error 5) u DeLonghi / Philips / Krups and how to fix it?

Accepted Answer

Airlocked water circuit or weak Ulka vibration pump. Repair procedure: Remove the water filter from the tank and run hot water through the steam wand; if pressure remains weak, replace the Ulka EP5 pump (approx. 14 €) and O-ring seals.

Question 3

What does error code Descaling Indicator Light (Calc / Descale) u DeLonghi / Philips / Krups and how to fix it?

Accepted Answer

Scale-clogged thermoblock heater. Repair procedure: Run the automatic descaling cycle with genuine DeLonghi EcoDecalk / Philips descaler (never use vinegar, as it destroys silicone seals!).

Coffee Machine Faults: Red Triangle, Airlocked Pump, Error 1/3/5 – Error Code Meaning, Troubleshooting & Repair

Error Code Reference Table for DeLonghi / Philips / Krups and step-by-step repair procedure:

Error Code	Meaning / Fault Symptom	Most Common Cause & Repair Procedure
Red Exclamation Mark / Jammed Brew Group	Brew group cannot be removed or binds mechanically	Turn the coffee machine off and on to reset the drive carriage, rinse the brew unit in lukewarm water, and lubricate the piston with food-grade silicone grease!
Coffee machine hums loudly but no water flows (Error 5)	Airlocked water circuit or weak Ulka vibration pump	Remove the water filter from the tank and run hot water through the steam wand; if pressure remains weak, replace the Ulka EP5 pump (approx. 14 €) and O-ring seals.
Descaling Indicator Light (Calc / Descale)	Scale-clogged thermoblock heater	Run the automatic descaling cycle with genuine DeLonghi EcoDecalk / Philips descaler (never use vinegar, as it destroys silicone seals!).