Adexa P120D60EYPV-DP – Random Fuse/trip Blowing

[Hollytree_Technical]

Hi All

Bit of an odd one this but I have a customer with 2 of these “Commercial” inverter microwaves and they are both showing the same problem.

Ocasionally while cooking they will trip the breaker (32A), most of the time the customer just resets the trip and can then continue to use the microwave as normal but every few months it will blow the internal fuse (12.5A) at which point I am called to fix it. I have managed to confirm with the customer that it does not happen when opening/closing the door but only when cooking. I have tested the door switches, magentron and inverter as much as I can but have not been able to find any fault and they always work perfectly when I am there.

My suspicion at the moment is that the inverter my be randomly “locking up” but I don’t know why as they are both in good condition I have measured the voltage at the socket at 230V (the electrician has also been called in and can find no fault with the circuit).

Jem

[kwatt]

Not a microwave expert.

Not a commercial appliance one either.

But, random blowing a fuse, the only tihing I can think on is some kind of a surge in the supply as that’s the most likely thing to vary. The internal components I’d not think so much, if they work they work and are unlikely to cause a random issue.

Just my thinking if it helps.

K.

[electrofix]

can agree with that
you have 2 units with the same fault at the same time so its either a design fault or a 1000 to 1 fault

are they on the same circuit? as K says all it would take is a loose screw in a socket or the like to cause a spark and upset the breaker

also is that breaker an MCB or an RCBO as is it an RCBO it will be a lot more sensitive to bad joints

Dave

[Hollytree_Technical]

They are both plugged in next to each other and the circuit has supposedly been checked by an electrician, the breaker is a type B 32A MCB.

My suspicion is either a design fault or random power surge.

The internals are made by Galanz so I have no idea about their reliability compared to the usual panasonics.

Jem

[electrofix]

ok plug them in somewhere else and see what happens but it must be on another breaker

just seems odd you have 2 units with the same fault at the same time

the circuit is the only common factor, could be an over sensitive breaker

Dave

[Author]

Posts