[freezer_user]

Re: Ocean APM6825 from MFI

Hi me again, back with the original problem that started this post, however a bit more info!!

Having left the freezer for several weeks, decided to check back to see how much ice build-up there was. Sure enough the ice is building up again.

This time had a look more carefully at the components and have found the following info:

Looked carefully at the plastic black thing that is wired in series with the defrost element and written on it is T 72 degrees(a degree symbol). This must indicate it is the defrost switch, as 72F is 22C.

I measured the resistance of the heater and switch in series and it read 0.29 ohms.
The element spec is 160W at 220V as printed on the element itself.

Does the 0.29 ohms sound right?? Could i replace the black plastic switch with a standard metal one (why on earth my freezer manufacturer has to be different i dont know!)?

Is there a way i could put power to the heater to check it is working as it could be the PCB not turning it on? Or is there another test i could do with the volt meter to test the heater?

Hope thats not too many questions!!

Thanks in advance

Freezer_user

[freezer_user]

Re: Ocean APM6825 from MFI

Thanks r600a,

My doors shut fine. So that is not the problem.

I suspect my heating element may be faulty; does anyone think what i mentioned about the freezer drawing 20W whilst the motor was not running could indicate it was trying to defrost but clearly not drawing enough power.

Another question, does the heating element run on 240V and is it switched via a relay on the PCB? Is there a relay elsewhere? I am trying to eliminate the fault being PCB related. The fridge and freezer temps are correct and the motor is cutting in and out properly ie not over-running.

Does anyone know what resistance there should be in the element so i can test it with a multimeter?

Thanks again! Hopefully i am near to fixing this problem!

freezer_user 😛

[freezer_user]

Re: Ocean APM6825 from MFI

Oops i posted as guest, forgot to log in!! 😳

One thing i must add to the post; when it read 20W i had the doors shut, ie the light inside was off.

Please read my previous post, thanks again!

freezer_user 😛

[freezer_user]

Re: Ocean APM6825 from MFI

Thanks again dave.

So the heater cut-out has nothing to do with measuring temperature; it is just to protect the heating element?

And the defrost probe determines when the system is defrosted and tells the pcb to cut off the heater?

One more question; sorry to keep firing them at you!

I have been looking under the flap at the bottom of the panel in the freezer; i can just see the bottom of the coils; in order to check it is defrosting. I can see small icicles at the bottom, which looks like it has indeed been melting frost. Is it normal to see small icicles or should the coils be totally free of frost and ice if auto-defrost is working properly.

I am trying to determine where the fault is; kinda tricky as it could be so many things!

Also, do you have any idea where the thermostat for the refridgerator located?

This site is really useful! Thanks again! 😛

[freezer_user]

Re: Ocean APM6825 from MFI

Thanks Dave that helps alot.

Just a question about the defrost system in this freezer.

The defrost element is connected in series with this little black component (rectangular plastic) that is clipped to the evaporator coils. I thought this was the defrost limit switch thermostat but its plastic and doesnt look like ones i have seen on the web.

NEUTRAL——–I Black thing I————–element————LIVE

The live and neutrals go to a connector block that i think connects to the PCB.

There is also a white torpedo shaped device embedded in the coils with brown and blue wires connecting to the same connector block. These must go off to the PCB as well.

What i am confused about is which is the defrost sensor? Is the white object the defrost thermostat, if so what is the black thing?!

How much are these two parts and do you know how much a replacement PCB is?

Also, you say it is a Brandt made appliance, do you by any chance know if there is a Brandt model number also; as the one i have must be an MFI model number?

Thanks so much for your help! 😛

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