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Heatpump operates when it shouldn't - please help!

Postby rapid » Tue Aug 31, 2010 10:28 am


If anyone can help me I would be very grateful...

I have an air-to-water heatpump that supplies me with hot water and also underfloor heating (UFH). The heatpump details are as follows:
Alpha Innotec 12 KW Air-to-water Heatpump,
230v / 1NPE / 50Hz
LW 120M-A/XS
1NPE 230 VAC 50Hz

However, when the UFH system is set to "auto", the heatpump operates for up to an hour per day for no apparent reason - i.e. no room stat is calling for heat / it is not on a timer, etc. I have been taking detailed readings to confirm this and discovered that it is switching itself on up to 6 times per day for short periods at a time.

The company that installed the system has gone bust, so I can't go back to them.

Many thanks in advance for any thoughts on the matter.
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