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error Haswill
Error Code Continous beep (‘di-di-di’)
Alarm indicating an error or malfunction requiring troubleshooting.
? What Causes This
An error condition is present based on the described codes and conditions.
✓ How to Fix It
Identify the displayed code and follow troubleshooting steps to resolve the issue. If applicable, pressing a button will temporarily stop beeping but display persists until resolved.
Source: page 63 of the official manual
From the manual
This error code appears in:
Haswill Stc 1000 Temperature Controller