ᐅ Novelan Heat Pump Error 704 – Hot Gas Fault

I hope that expertise in these systems will be developed in the coming years... because as long as every heating installer here just installs something without knowing how or why it is designed that way – leaving the customer to have to research endlessly – it is problematic.

Hello everyone, the refrigeration technician came by today. Refrigerant was refilled, but the heat pump still shows the same error 704. This means I need a new compressor. Can someone tell me which type I need? The heat pump is an Alpha Innotev LWD90a, and it has a Copeland scroll compressor installed with the designation APH 73YAAMT. Unfortunately, there is no detailed information available about the compressor. Can anyone help me?

What use is the designation to you, are you planning to install it yourself? It sounds more like a task for a technician.

The refrigeration technician needs the exact specification to ensure that the wrong compressor is not installed.

Hello,
maybe ask the manufacturer...?

Daniel-Sp schrieb:

Hello,
Should I ask the manufacturer about the energy consumption...?

Hello, I wanted to share an update here, as this topic might be relevant for many who have a similar heat pump.
First of all, we waited three months for the replacement parts...
Right now, the technician from the manufacturer is here.
He is checking everything but already said that all the parts will be replaced. He checked, and it’s even covered under warranty – with Novelan, we have a five-year manufacturer’s warranty on everything related to the refrigerant circuit.
The expansion valve, compressor, and so on will all be replaced free of charge. I really hope it stays that way and no unexpected bills will come in a few weeks.

During the three-month waiting period, I switched the hot water supply to a secondary heat source to prevent error messages from appearing.
I hope none of you have too many problems with your heat pumps after such a short time.

Best regards