Grant Aerona alarms: a heat pump in a house built for a boiler

What Does Error Aerona alarm codes Mean?

Grant Aerona alarms divide between the sealed refrigerant side of the heat pump and the water circuit it serves, and the second group is where most retrofit installations end up. A heat pump moves far more water than the boiler it replaced, so a circuit that was adequate before can leave the appliance short of flow. Applies to: Grant Aerona air source heat pumps documented in the Grant fault and support material The Aerona name covers several generations with different refrigerants and different controllers, and the alarm set differs between them. Take the model and serial number from the outdoor unit and read the alarm against Grant documentation for that unit rather than a general heat pump list. Owner-safe checks: Photograph the controller showing the alarm before anybody clears it, together with any text alongside the number. | Write down how cold it was outdoors and what flow temperature the controller had been calling for when the alarm arrived. | Feel every radiator and underfloor manifold during a heating period and map which heat well and which do not. Qualified technician: Where an alarm sits on the sealed side of the machine, only a certified person may open it: the F-Gas framework governs that in Britain and the European Union, and Section 608 does the equivalent job in the United States. | Adjusting pump settings, balancing a circuit, or altering emitters on a heat pump installation should be done by somebody working to heat pump flow rates rather than boiler practice.