L
la poste
Greetings one and all.
I have been asked to look at a central heating system.
The boiler is not firing so I did some tests.
It's a standard Y plan system open vented.
The boiler is getting the switched live feed from the three port valve OK.
However the pump live out from the boiler is dead and when I switch the boiler on I get a slight wurring of the internal fan and then nothing.
The voltage at the fan reads 40 Volts, that is the voltage from the PCB to the fan.
There is no error code on the front panel the boiler just goes dead in the water so to speak.
When the boiler is switched on a green light comes on the front panel, the fan farts for a bit and then the front panel dies and so does the fan.
I noticed when going through the system the pump had been put on back to front so the flow was aimed at the boiler and not towards the three port valve.
I changed the pump so it faced the right way but still the boiler is dead.
My two main questions are:
Is the fan voltage supposed to be this low (40 volts) and does this sound like the PCB is fried?
Also one more thing, before I appeared on the scene IE last week the boiler was reading a F5 code as in it was overheating.
This was probably due to the pump being the wrong way round.
Now there is no F5 code just a dead boiler.
Many thanks.
I have been asked to look at a central heating system.
The boiler is not firing so I did some tests.
It's a standard Y plan system open vented.
The boiler is getting the switched live feed from the three port valve OK.
However the pump live out from the boiler is dead and when I switch the boiler on I get a slight wurring of the internal fan and then nothing.
The voltage at the fan reads 40 Volts, that is the voltage from the PCB to the fan.
There is no error code on the front panel the boiler just goes dead in the water so to speak.
When the boiler is switched on a green light comes on the front panel, the fan farts for a bit and then the front panel dies and so does the fan.
I noticed when going through the system the pump had been put on back to front so the flow was aimed at the boiler and not towards the three port valve.
I changed the pump so it faced the right way but still the boiler is dead.
My two main questions are:
Is the fan voltage supposed to be this low (40 volts) and does this sound like the PCB is fried?
Also one more thing, before I appeared on the scene IE last week the boiler was reading a F5 code as in it was overheating.
This was probably due to the pump being the wrong way round.
Now there is no F5 code just a dead boiler.
Many thanks.
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