Vokera linea 28. Error 04, water pressure OK. Micro switch is not pressed.
- Thread starter garnet
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https://www.vokera.co.uk/wp-content...8_installation_and_servicing_instructions.pdf
04: Insufficient water pressure. Check pressure and restore if necessary (see 6.3.4). Reset as described for code 01.
So it is pressure not flow. The thing you put the arrow to in the first post is the flow part though. Is the model you have definitely the exact model in the manual?
04: Insufficient water pressure. Check pressure and restore if necessary (see 6.3.4). Reset as described for code 01.
So it is pressure not flow. The thing you put the arrow to in the first post is the flow part though. Is the model you have definitely the exact model in the manual?
https://www.vokera.co.uk/wp-content...a_installation_and_servicing_instructions.pdf
maybe older version but 04 is still pressure
maybe older version but 04 is still pressure
here we go its this version https://www.vokera.co.uk/wp-content/uploads/2012/11/linea-28-mark-1-291012.pdf
It doesn't have a water pressure switch so the code can't be for that
It doesn't have a water pressure switch so the code can't be for that
You are spot on. It is mark 1.
That's the reason for asking: what part of the boiler relate water pressure information to the PCB, so it shows error 04?
if there is no water pressure switch then it can't be water pressure info going to the PCB, it just has a gauge by the look of it. Do you have the service and installation manual for it? I can't find it online
My thought exactly. I dont have service and instalation manual unfortunatelly. In the one you provided there is a DOMESTIC FLOW SWITCH / FILTER P/n 1488. I wonder if this has anythign to do with the problem - it has electrical connection:
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Sure is
Vokera part no 6872
Part 6867 is the bearer plate that diaphragm sits on and spindle is part no 6888
Absolutely nothing to do with 04 code.My thought exactly. I dont have service and instalation manual unfortunatelly. In the one you provided there is a DOMESTIC FLOW SWITCH / FILTER P/n 1488. I wonder if this has anythign to do with the problem - it has electrical connection:
This unit activates the boiler when hot tap is run.
Item 17, the plunger passes through part 23 and is attached to item 16 which itself rests on the diaphragm 15
In idle state, the spring retracts the plunger. System water is exerting same pressure on both sides of diaphragm
When the pump runs, differential pressure is created across the two ports
This differential pressure is applied to the flow manifold
+ve pressure is present base of diaphragm and -ve at the spindle side- spindle pushes out
Spindle will not push out without pump run; if it does then there is a defect
Greater differential is created during heating mode as indicated in post 12
Item 1488 is present in every combi boiler by Vokera in one form or another. This part tells the boiler hot water is needed.
You say parts are high quality. Did you buy genuine part or a refurbished part.
Know where I am coming from as I have been repairing boilers for over 30 years. Does not mean I know everything about boilers, just have reasonable knowledge to make them work
In idle state, the spring retracts the plunger. System water is exerting same pressure on both sides of diaphragm
When the pump runs, differential pressure is created across the two ports
This differential pressure is applied to the flow manifold
+ve pressure is present base of diaphragm and -ve at the spindle side- spindle pushes out
Spindle will not push out without pump run; if it does then there is a defect
Greater differential is created during heating mode as indicated in post 12
Item 1488 is present in every combi boiler by Vokera in one form or another. This part tells the boiler hot water is needed.
You say parts are high quality. Did you buy genuine part or a refurbished part.
Know where I am coming from as I have been repairing boilers for over 30 years. Does not mean I know everything about boilers, just have reasonable knowledge to make them work
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The pump was replaced. 3 days on, the boiler works as expected.
The old pump was not stuck/seized - rotates freely. When it does rotate.
Seems like a weak pump - I am not sure what 'weak' means, but it seems the pump can not produce enough pressure to operate the plunger as described in the above post.
Thanks everyone.
The old pump was not stuck/seized - rotates freely. When it does rotate.
Seems like a weak pump - I am not sure what 'weak' means, but it seems the pump can not produce enough pressure to operate the plunger as described in the above post.
Thanks everyone.
Weak capacitor. Said it multiple times. Would have cost £5 for a new one and its just a case of undoing a screw on the box on the side of the pump, pulling 2 wires out and pushing the new ones in.
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