⚠
warning Haswill
Error Code HH
Room temperature exceeds maximum allowed value of 99.9°C.
? What Causes This
High room temperature readings or load malfunction.
✓ How to Fix It
Check the temperature and all connected loads, manually stop any working equipment if necessary.
Source: page 63 of the official manual
From the manual
This error code appears in:
Haswill Stc 1000 Temperature Controller