⚠
warning Itho Daalderop
Error Code LED blinks red slowly
Denotes blocking, possible malfunction or insufficient power supply.
? What Causes This
Hardware errors or incorrect software operations.
✓ How to Fix It
Address faults and reset appliance; seek service if issues persist.
Source: page 32 of the official manual
From the manual
This error code appears in:
Itho Daalderop 120l Smart Upp Boiler