@sunandair This is the sequence of lights that appear and change very quickly before all going out.
-- Attachment is not available ---- Attachment is not available --
I've seen their data sheets and video on what the various numbers mean. Just by pressing the button once it will give you it’s setting followed by the head pressure and flow rate.
You have this pump set to PDP3 which means Proportional Differential Pressure, speed 3. There are only 3 speed settings
So Im thinking you might have 3 storeys of radiators or a large number of radiators? Is this the case?
If so, I would suggest you keep the proportional differential pressure setting but just change the speed setting to 1. So the little three-line symbol indicates the PDP setting then scroll with 2 presses at a time to move through the other settings sequentially.
just stop pressing when you see L/ 3 oops sorry I meant L/ 1 (the icon isn’t quite L/ but do you get the idea?
👍👍👍👍👍👍👍👍
PS the other numbers you photographed were head pressure and flow rate numbers.
Also I mentioned some time back that I thought my DHW pump was constantly running when there was no call for heat.....this pump has manual speed control and I can confirm that the pump is running as it is evident when adjusting speed.....I don't understand that one either, if anyone has the preplumbed ecodan system just wondered if they have noticed similar behaviour.
Have you solved this Dave..... my understanding is that this first pump is always on because it is the Primary Flow pump serving both the DHW and the ongoing central heating, it’s just dependent on the 3way valve calling for hot water or space heating. The second pump then switches on with the primary pump to circulate through the radiators. It would also suggest there should be some hydraulic separation somewhere. .?.?
@sunandair This is the sequence of lights that appear and change very quickly before all going out.
-- Attachment is not available ---- Attachment is not available --
I've seen their data sheets and video on what the various numbers mean. Just by pressing the button once it will give you it’s setting followed by the head pressure and flow rate.
You have this pump set to PDP3 which means Proportional Differential Pressure, speed 3. There are only 3 speed settings
-- Attachment is not available -- -- Attachment is not available -- -- Attachment is not available --
So Im thinking you might have 3 storeys of radiators or a large number of radiators? Is this the case?
If so, I would suggest you keep the proportional differential pressure setting but just change the speed setting to 1. So the little three-line symbol indicates the PDP setting then scroll with 2 presses at a time to move through the other settings sequentially.
just stop pressing when you see L/ 3 oops sorry I meant L/ 1 (the icon isn’t quite L/ but do you get the idea?
👍👍👍👍👍👍👍👍
PS the other numbers you photographed were head pressure and flow rate numbers.
-- Attachment is not available --
Totally lost. Completely confused. Close to giving up and accepting/paying for what I have.
Thanks for trying and apologies for me being a clueless numpty. I should have paid more attention at school. 😥
Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.
Also I mentioned some time back that I thought my DHW pump was constantly running when there was no call for heat.....this pump has manual speed control and I can confirm that the pump is running as it is evident when adjusting speed.....I don't understand that one either, if anyone has the pre-plumbed ecodan system just wondered if they have noticed similar behaviour.
Have you solved this Dave..... my understanding is that this first pump is always on because it is the Primary Flow pump serving both the DHW and the ongoing central heating, it’s just dependent on the 3way valve calling for hot water or space heating. The second pump then switches on with the primary pump to circulate through the radiators. It would also suggest there should be some hydraulic separation somewhere. .?.?
@Sun&Air...thanks for your comments......a lot of water has passed under the bridge since I posted back on page 5 so things have got a bit disjointed in view of continuity in the forum,
I have attached my system schematic showing the 3 pumps and photo of the cylinder arrangement............As i see it if the system is calling for space heating then the two pumps on the left hand side of the cylinder will be running though the LLHeader.................I would have expected that if DHW was calling for heat then the primary heat pump would run via the 3 way valve to the plate heat exchanger, the DHW pump (on the right of cylinder) would also run.
I cannot see why if there is only space heating demand that the DHW pump needs to run ?.....interested in your thoughts.
@sunandair I've done a 540 enquiry (posted earlier). 21LPM at setting 5. The same at setting 3 so it appears that I cannot change the flow rate.
The rest of your post re flow and return thermistor readings and setting the AA parameters is beyond my current comprehension.
You will probably need to change the speed of the water pump external to your heat pump to change the flow rate
@derekm and everyone else 😄
I said that I would investigate in more detail what is happening with my full mitsubishi packaged system pumps and have just emerged from the loft.
I was querying which pump was being controlled by the FTC controller....I have reduced the speed on mine to 1 in an attempt to increase DT from 5. The flow rate shows 11/12 litres fluctuations, if I alter speed to 5 the flow rate shown on the 540 enquiry increases as expected,,... Now!!
I got my good lady to increase the speed up and down while I sat beside the pumps but there was no evidence of either pump varying in speed.....this I cannot understand at all!!!.....So is the controller setting the pump speed and if so why does the 540 flow rate command show the increased flowrate
Also I mentioned some time back that I thought my DHW pump was constantly running when there was no call for heat.....this pump has manual speed control and I can confirm that the pump is running as it is evident when adjusting speed.....I don't understand that one either, if anyone has the preplumbed ecodan system just wondered if they have noticed similar behaviour.
One of the pumps is an Auto pump with led performance lights, I don't fully understand how this works as the manual shows a lot of technical variables--See attachment (not in correct order)-----this appears to be the heating circuit pump.
The other pump is on the heat pump return and has no manual adjustment so I would have thought this is the pump controlled by the FTC controller speed setting...but as stated earlier no evidence of speed change when setting varied.
The plot thickens!
Hi Dave,
Can you provide close up photo's of the pumps so that they can be identified. Also the pump without any obvious manual control, how many cables are connected to it?
Hi Derek,
Photos as requested, the pump without any obvious manual control is the one adjacent to the one with LED display(the one that data sheets refer to), I am sure it has a second cable.
The other photo is the DHW Pump..............also attached schematics we have discussed in earlier posts when cop was my main issue.
As i have just posted to Sun & Airs reply i cant see why the DHW pump should run unless DHW calling for heat?
Also I mentioned some time back that I thought my DHW pump was constantly running when there was no call for heat.....this pump has manual speed control and I can confirm that the pump is running as it is evident when adjusting speed.....I don't understand that one either, if anyone has the pre-plumbed ecodan system just wondered if they have noticed similar behaviour.
Have you solved this Dave..... my understanding is that this first pump is always on because it is the Primary Flow pump serving both the DHW and the ongoing central heating, it’s just dependent on the 3way valve calling for hot water or space heating. The second pump then switches on with the primary pump to circulate through the radiators. It would also suggest there should be some hydraulic separation somewhere. .?.?
@Sun&Air...thanks for your comments......a lot of water has passed under the bridge since I posted back on page 5 so things have got a bit disjointed in view of continuity in the forum,
I have attached my system schematic showing the 3 pumps and photo of the cylinder arrangement............As i see it if the system is calling for space heating then the two pumps on the left hand side of the cylinder will be running though the LLHeader.................I would have expected that if DHW was calling for heat then the primary heat pump would run via the 3 way valve to the plate heat exchanger, the DHW pump (on the right of cylinder) would also run.
I cannot see why if there is only space heating demand that the DHW pump needs to run ?.....interested in your thoughts.
It probably does so because your installer wired both water pumps to the same output. If there is only the one output from the controller then you require an interposing relay, such that when one pump is on the other is off.
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