Error code
live-status-lamp-red-solid Alarm status lamp
How it shows on the unit solid red status lamp
Applies to 1 model
F750
What this means
An alarm is active and the heat pump has detected an operating fault it cannot correct by itself.
When to call a technician
This fault involves refrigerant, pressure, or electrical work that must be handled by a certified technician under EU F-gas rules. Do not attempt to open the refrigerant circuit, access mains wiring, or adjust pressure components yourself. Contact a qualified installer or servicer for this one.
See the official NIBE manualA deep link to the manufacturer's own PDF for full technical detail. We link to manuals, we never host them.
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