Ventilation system and heatpump switched off

Jahus progress:
Yesterday (27.jan) the Project Leader and the ventilation subcontractor visited our house to discuss the remaining tasks and come up with a project plan with milestones (and who should do what). This is good news and I hope to see some action in the coming weeks.

As described in a previous blog post, we have seen ice build-up on the intake of the heatpump outside. Yesterday, the company responsible for import of these heatpumps to Norway called me. He explained that during extremely cold weather the condensated water which normally falls freely from the heatpump to the ground (and flows away), will build up inverted icicles. When they reach the outlet for the condensated water (ca 0.5m), the water has nowhere to flow but out through the air-intake. The last picture attached to the previous blog post clearly show these icicles and the condensated water that has frozen in the air-intake. He told me to switch of the heatpump immediately to avoid further ice-building on the heatpump outside.

This message is definitely different from the message I got from the local ventilation subcontractor - he said that the ice problem is normal and nothing to worry about (and he told us to leave the heatpump fully operational). I am now waiting for further instructions and expect them to remove the ice from the heatpump before they try to start it again.
        
The other strange thing was that they pulled the plug on the ventilation aggregate (no power). They have not told us why, but at the moment we have no ventilation system and no heatpump :-(