Tunze 6205 adapter repair option

zhangg3 · Jun 27, 2024

The 24v fuse light does not come on on the adapter (6300.240) for my Tunze 6205 stream pump. Do I need to get a whole new adapter or can I try with replacing the fuse first? Any instructions on how to replace the fuse and where to purchase a compatible fuse? @rvitko

rvitko · Jun 27, 2024

This is not a 6300.240, it is a 6105.240. The jumper is not a fuse, it is a resistor to set voltage, does it not light up if it is not connected to a pump? If it does, this means that the pump is the problem, it uses too much power and the power supply shuts down as a safety. Generally a 6205 would be so old at this point it would be likely the pump could be dead, such a pump would be at least 12 years old and the expected service life is about 8 years. The power supply that replaced this is 6101.240. Changing the jumper is not likely to solve the problem and I am not sure if jumpers are even available, the light is behind the jumper and will light up even with no jumper.

zhangg3 · Jun 27, 2024

Thanks for the quick reply! The light does not come on when I just plug the adapter in power, without connecting the pump.

Is it safe to assume the whole setup is going to the dumpster? It is such a pity as my even older stream 6100 is still functioning.

zhangg3 · Jun 27, 2024

Hi Roger...slight update: I took the adapter (6105.240) from my other running pump and it was able to drive the 6205. So the pump still works. Do you have a link where I can just buy a new adapter?

rvitko · Jun 28, 2024

This is the current equivalent, https://www.tunze.com/US/en/details/6101.240-24-vdc-power-supply-unit.html, it will work but is always 24V, no jumpers.

In general the old pumps 6100 last on average 10-12 years, the external driver used electrolytic capacitors which have a longer life span. To miniaturize it so this circuit board is inside the motor, we had to switch to TFC capacitors, these have a lifespan of 8-10 years in general, this is typically what results in the end of life for any DC pump, once the capacitors no longer hold a charge, the pump cannot start and usually these failures cause other components to fail.