28 | © Danfoss | 2022.02
LGB55001
Termix VVX-IV - 7 Series DS Fully insulated
In the event of malfunction, check the following before initiating
troubleshooting:
• That there is a power supply to the HIU.
• That the strainer on the Heat Network pipe has been cleaned.
• That the Heat Network flow temperature is normal.
• That there is sufficient differential pressure.
Measures AFTER troubleshooting
Once the troubleshooting has been completed, undertake
the following measures:
• Tighten all union connections.
• Wipe off the HIU and clean up any fluid spills.
• Balance the HIU if necessary.
• Check that pressure and temperature are at normal levels.
Troubleshooting
Authorised personnel
All troubleshooting and maintenance may only be carried out
by an authorised and qualified HVAC or electrical technician.
