!!
critical Itho Daalderop
Error Code E2
Hardware error — incorrect processor instructions
? What Causes This
Error in processing unit handling.
✓ How to Fix It
The appliance resets automatically up to three times. Replace control board if issues persist.
Source: page 39 of the official manual
From the manual
This error code appears in:
Itho Daalderop 120l Smart Upp Boiler