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Bezzera

Author Topic: Getra ME-709 Steam Problems  (Read 865 times)

getra

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Getra ME-709 Steam Problems
« on: 06/11/2018, 01:58 PM »
Hi all,
I have purchased 18 months ago, a new Getra ME-709 automatic coffee machine (same as Merol and Pronto ME-709 models or China model No SB-CM709). It has been working fine but just recently, it has been failing to deliver steam from the wand, just spitting water with a little steam. It's not producing sufficient steam to suck up milk using the (milk delivery and frothing device) to froth the milk anymore. But the machine still makes great coffee and the delivery of hot water is all ok...

I would dearly love to source a service/repair manual so as to determine and fix my ME-709 problem but I have exhausted all avenues on the internet. Can someone direct me to where I can source one please?

My research has given me some insight into the workings of automatic coffee machines and their boilers, thermoblocks, solenoids, thermostats, NTC sensors operation etc but still need some direction to fix my problem...

I have performed basic resistance tests on the steam thermoblock components including heating element, thermostat, NTC sensor thermistor, overload thermistor and the hot water/steam delivery pipes and solenoid and they all appear to test ok?? Maybe the main board has a problem??

I have not performed any "live" voltage tests as of yet...

I have purchased an infared heat temp gun to check the thermoblocks temperatures but still waiting its delivery..

I would be so grateful to any responses......

Kind regards
Gary



askthe coffeeguy

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Getra ME-709 Steam Problems
« Reply #1 on: 07/11/2018, 08:15 AM »
hi Gary, 

I'm not familiar with that machine but if it's a problem with the steam pressure it might be a pump issue?

where do you live ? if you can't fix it yourself it may be worthwhile taking it to a local repairer?

any photos of the machine in question?

best,

Pat
"The crema which dissipates is not the lasting crema..."

getra

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Getra ME-709 Steam Problems
« Reply #2 on: 07/11/2018, 05:18 PM »
Thanks for your reply Pat.

Live in Bali mate but refuse to take it to a local service agents as I don’t trust any of them any more after they butchered my Sunbeam Intuitive EM8910 and rendered it useless…

When my infrared heat temp gun arrives, I will open the coffee machine again and check thermoblock temps and perform some live voltage tests and let you know results.

I think it may be either a faulty steam thermoblock thermostat cutting in too early not allowing the steam thermoblock to get up to steam temp (around 120 Deg C) or a faulty steam thermoblock NTC sensor thermistor that tells the control board to pulse the relays off and on until they come up to temperature for the steam.  Will get back to you after performing some more tests.  Would love repair manual......

Have enclosed photo of Getra ME-709 thermoblocks, components and wiring.

As you can see, two thermoblocks in series, first one for hot water and second one for steam..

Regards
Gary

getra

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Getra ME-709 Steam Problems
« Reply #3 on: 08/11/2018, 11:43 AM »
Sorry Pat, forgot to respond to your pump comment.....

I am sure it is not a pump problem as the machine still makes great coffee and the is no problems with the delivery of hot water out to the steam wand.

Note, as you can see from previous post pic, the water from the pump enters the hot water thermoblock and actually flows thru the steam thermoblock, thru the flow control solonoid then out to the wand...

Cheers
Gary ...

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Getra ME-709 Steam Problems
« Reply #4 on: 12/11/2018, 05:28 PM »
That's a thats a tough one if you're there long term maybe consider buying another machine the sunbeam is a pretty good work horse compared to a lot of the machines out there 
"The crema which dissipates is not the lasting crema..."

Bezzera

 

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