Blomberg 1501 No Spin – Not the normal problems

[Eeeps]

I have a Blomberg 1501 that has recently stopped spinning.

Thanks to this forum I’ve managed to check the most common causes.

1) Cleaned the pressure bottle on the back of the drum (including grommet)
2) Checked the condition of the motor brushes (took motor out to do this) These are fine.
3) Part checked the pressure switch by blowing in the pipe and listening for the switch clicks.
4) Removed the control board. There are two diodes which are quite close to the motor connector. The PCB around these is slightly discoloured.

Now I’m stuck.

I’d like to confirm that the pressure switch is actually working – I have a multimeter but don’t know the connection details.

What other things could cause the machine not to spin. The motor turns both ways during the wash cycle OK.
Now I have the controller out, are there any checks I can make?

I could start replacing components – the triac & relays seem favourite but I could end up spending money for nothing.

Thanks and Merry Christmas

Ian

[helo_75]

im sure the switch on them are a 3 postition switch, try blowin up it first, see if it clicks 3 times?

[Eeeps]

Re: Blomberg 1501 No Spin – Not the normal problems

Well, I checked the two diodes on the control PCB – OK.
Removed the pressure switch and checked continutity – OK on all four settings.

(The four are 1-Low ; 2-Medium; 3-High; 4-Overfill)

The machine uses:-
A N/O contact on the medium setting for the heater.
N/C contacts for the sensing the other four condtions.

Anyway, put it all back and … it span first time.

Running a full cycle (empty) at 90deg.

But I really don’t know why it’s working now.

Ian

[Penguin45]

Re: Blomberg 1501 No Spin – Not the normal problems

If the spin failure was a one off event, it is entirely possible that the Out Of Balance control was activated. A load which will not even out can cause the motor to accelerate and decelerate excessively. The computer side of things can decide that this is excessive and will not spin the load.

Penguin45.

[Eeeps]

Re: Blomberg 1501 No Spin – Not the normal problems

Penguin45 wrote:If the spin failure was a one off event, it is entirely possible that the Out Of Balance control was activated. A load which will not even out can cause the motor to accelerate and decelerate excessively. The computer side of things can decide that this is excessive and will not spin the load.

Penguin45.

Thanks for the reply.

I’ve now read up a bit on how the out of balance works on these machines. As I understand it it does a low speed ‘test’ spin to determine the out of balance from the motor tacho. Short term variations in the speed with a repetition at the drum rotation rate show an unbalance. The amplitude of these speed variations gives the amount of unbalance.

In my case the machine would not even attempt this ‘test’ spin. It would perform the initial attempt to balance the load but then stop with the pump running; as though it had detected an imbalance. It did this many times when I tried it last week.

I think it has something to do this the level sensor. This was clearly blocked when I cleaned it. I just wonder if the computer stores the fault if it happens often enough then requires a few runs to clear it (a little like OBD in vehicles)

Ian

[helo_75]

nope!!!

blombergs do not attempt ANY spin if the load is found to be unbalanced during the distribution process, and thats why it stopped with the pump running after trying to distribute the load, answered ur own question!

penguin was spot on with his diagnosis, what you did did not cure the problem cos there wasnt one, although its a bonus having the thing cleaned out, and no, they dont have a memory

[Eeeps]

helo_75 wrote:nope!!!

blombergs do not attempt ANY spin if the load is found to be unbalanced during the distribution process, and thats why it stopped with the pump running after trying to distribute the load, answered ur own question!

penguin was spot on with his diagnosis, what you did did not cure the problem cos there wasnt one, although its a bonus having the thing cleaned out, and no, they dont have a memory

… except that it did not even run the distribute and therefore could not have detected an out of balance condition. It didn’t stop; it never started.

Cheers,

Ian

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