ASHP commissioning help needed.

[Dam0]

Hi all,

Could really do with a bit of help with the commissioning of my new Ideal logic air ASHP system if any of you could spare a minute or two.

 

I've paired the HP with Logic's own unvented cylinder and controller.

 

My issue is: I cant get the compressor on the heat pump to start up. I get the message of "locked, return temp min" on the screen. I've spent hours messing around with it and I can't get the compressor to start at all. I am getting no registered fault codes and I can get the CH pump to run but the compressor doesn't attempt to start.

 

I've removed the return temperature sensor and I get the note of "released, compressor ready" but again, it doesn't attempt to start. It also then states that the return sensor is "not used" and doesnt flag as a issue.

 

Only thing I can think of after reading the manual is that it states that the compressor needs to be left with power for a minimum of 6 hours before use to prevent damage. Is the system clever enough to know this?

 

I have a permanent bridge installed for the room stat and it's using an external sensor for WC.

 

I'm a bit lost now if im honest...

 

The HP itself also doesn't have any fault codes/blinking lights - just a solid green light as it should.

 

Thanks for any assistance with this. much appreciated.

 

 

[JohnMo]

18 minutes ago, Dam0 said:

reading the manual is that it states that the compressor needs to be left with power for a minimum of 6 hours before use to prevent damage. Is the system clever enough to know this?

It may well be. You have to switch it all on and come back after 6 hrs. The crankcase is heated to take the refrigerant out of the liquid phase, in the crankcase where it dilutes the lube oil, and kills any lubricating value.

 

If you still have an issue first thing tomorrow, it something else.

[JamesPa]

I seem to remember reading, when skipping through the Ideal (R32) installation instructions recently, that it would not start unless the return temp was greater than 17C,m and they were recommending various ways to ensure that this was the case.. 

 

This would be consistent with the message and, if it means what it says, is a bit mad!  

[Dam0]

Just thought I'd update this to help anyone in th future with an Ideal Logic Air ASHP -

 

So long story short, I managed to get it get it to work by forcing it to work on commissioning mode...  Phew

 

The next morning I used a hair dryer to warm up the flow and return stat and low and behold It fired into life. I checked the manual again and I couldn't find anywhere that mentioned it, so thought I'd update this thread.  Thanks JamesPa for your reply.

 

So far the system is working will with a COP of just under 5. Thanks to JohnMo for help with the design (I bypassed the buffer, extra pumps, zone valves etc make it completely open loop). I'm sure I'll have plenty of questions to optimise the system in the coming months.

 

 

 

 

[JohnMo]

Well done, where there's a will....