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TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
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CoffeeRoastersClub
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Posted Sat Sep 3, 2011, 4:11pm
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

oldgearhead Said:

...and now back to the subject of this thread, the DCM900. Ater 7 months mine still makes great drip coffee. I should report that both internal fuses have failed, at different times. But it works without them, and I trust my 20 amp ground-fault breaker. The element reads 10 ohms and it passes hi-pot test to ground...

I believe the fuses failed because of the rapid switching action of the T-stat. The heater very rapidly raises the coil temperature then the t-stat shuts it off. This cycle occurs about 40 times during the last 4 minutes of the brew cycle. I don't know about Bunn, but my Bloomfield sure doesn't cycle like the DCM900.

The eBay seller still has 26 new ones for about 40 USD each. Anyone have any broken ones for sale?

Posted September 2, 2011 link

Hello.  Regarding the fuses, did you just solder/wire jump the fuse connection sockets?

Len

 
"Coffee leads men to trifle away their time, scald their chops, and spend their money, all for a little base, black, thick, nasty, bitter, stinking nauseous puddle water." ~The Women's Petition Against Coffee, 1674

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oldgearhead
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oldgearhead
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Posted Sun Sep 4, 2011, 4:12pm
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

CoffeeRoastersClub Said:

Hello.  Regarding the fuses, did you just solder/wire jump the fuse connection sockets?

Len

Posted September 3, 2011 link

After making sure its unplugged from the outlet:
1) Remove bottom (6 screws).
2) Remove plastic water guard (2 screws)
3) Locate the failed fuse (ohmmeter).
4) Slide fuse out of clip (if its the one in the clip).
5) Slide the fuse out of the plastic sleeve.
6) Cut out the fuse, twist the wires, together, and solder the wires.
7) Tape the solder joint and slide the joint back into the plastic sleeve.
8) Reassemble..

After doing this you need to be sure you are protected from the coffee maker with a working ground-fault circuit breaker no larger than 20 amp. Also a 500V hot-pot test of the heater element-to-ground is advised
if ANY signs of water damage are observed near the element..
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CoffeeRoastersClub
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Espresso: Vintage La Pavoni Lever...
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Posted Thu May 17, 2012, 9:02am
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

Hello Oldgearhead.  My apologies for reviving an old thread, however I wonder if you still have your DCM900?  My Krups superauto died after 3 years use, and I decided to go try the DCM900 from amazon for around $50.  I know that it has some bugs, but if they happen it appears I could fix them at my shop.

Len

 
"Coffee leads men to trifle away their time, scald their chops, and spend their money, all for a little base, black, thick, nasty, bitter, stinking nauseous puddle water." ~The Women's Petition Against Coffee, 1674

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oldgearhead
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oldgearhead
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Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Wed May 30, 2012, 12:49pm
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

My DH900 = 496 days and 24,800 ounces of 203F drip...
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phantasm10
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Posted Mon Jun 11, 2012, 6:49pm
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

oldgearhead Said:

After making sure its unplugged from the outlet:
1) Remove bottom (6 screws).
2) Remove plastic water guard (2 screws)
3) Locate the failed fuse (ohmmeter).
4) Slide fuse out of clip (if its the one in the clip).
5) Slide the fuse out of the plastic sleeve.
6) Cut out the fuse, twist the wires, together, and solder the wires.
7) Tape the solder joint and slide the joint back into the plastic sleeve.
8) Reassemble..

After doing this you need to be sure you are protected from the coffee maker with a working ground-fault circuit breaker no larger than 20 amp. Also a 500V hot-pot test of the heater element-to-ground is advised
if ANY signs of water damage are observed near the element..

Posted September 4, 2011 link

Thanks for the info.  I was able to get mine brewing again after i eliminated the fuse.
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sea221
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Grinder: Baratza Virtuoso
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Posted Tue Jun 12, 2012, 4:58pm
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

Why would you bypass a fuse, solder in a new fast blow 20 amp fuse if that's the size required, don't know the size of the heating element but I suspect 1000 to 1200 watt, if that's the case 15 amp would be good. Radio shack would have a little cheapee soldering iron for under $10.00. If you can't do it your self U must know somebody in the electrical field that could do it for you, or after it is opened up take it to a small appliance repair place and have them install maybe a small inline fuse that you can replace when needed. I bought one of these about a year ago and it lasted a week it really did a good job of making coffee and looked very nice. The only down side for me was the build quality was very flimsy, you had to be very careful with it moving it around.
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oldgearhead
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oldgearhead
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Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Mon Sep 24, 2012, 7:57am
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

Dead at day 616! The plastic mountintg plate between the cold water tank and the heat section is badly warped. It was great to have +203F water for almost two years.
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oldgearhead
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oldgearhead
Joined: 25 Jan 2010
Posts: 396
Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Wed Sep 26, 2012, 6:11am
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

I wanted to know what caused the demise of my DCM900, so I tore it down.
I found:
1) The cold side got so hot the plastic adapter located between the cold tank and the heat tube system melted.
2) The heat tube was plugged with calcium.

Cause:
1) Water softener failure.
2) Me not getting around to fixing it (water softener) right away.
3) Me not descaling the DCM900 the last time the little light was blinking.

Action:
1) Ordered new riser tube, screen, and resin for water softener.
2) Ordered another DCM900.

Why another DCM900?
1) Because its $50.00 (delivered), not $200.00.
2) Has an excellent coffee filter system (Melitta or Gold)?
3) It gets the water hot (206F).
4) If Mr. Lincoln tasted the coffee from my Mr.Coffee backup, he would order tea.
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oldgearhead
Senior Member
oldgearhead
Joined: 25 Jan 2010
Posts: 396
Location: Go Colts!
Expertise: I like coffee

Grinder: Virtuoso by Baratza
Drip: Chemex,Dilongi DCM900
Roaster: 1/2K Fluid-bed
Posted Sat Oct 20, 2012, 7:28am
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

I've been using my second 'new-old-stock') DCM900 for a few weeks now, it's a good time to check the water temperature. I have an extra plastic filter basket with a hole for the thermocouple, so it's an eaesy task:
Water level in filter basket/ temperature
20%/196DF
40%/198DF
60%/204DF
80%/203DF
100%/204DF

Interesting to note, the second DCM900 is a couple of degrees F cooler than the first one was at 204-206F.
Coffee taste is a bit better to me...
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raisin
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Grinder: Virtuosa
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Posted Sat Oct 20, 2012, 3:52pm
Subject: Re: TECHNIVORM KNOCKOFF? Anyone tried the DeLonghi DCM900?
 

oldgearhead Said:

I've been using my second 'new-old-stock') DCM900 for a few weeks now, it's a good time to check the water temperature. I have an extra plastic filter basket with a hole for the thermocouple, so it's an eaesy task:
Water level in filter basket/ temperature
20%/196DF
40%/198DF
60%/204DF
80%/203DF
100%/204DF

Interesting to note, the second DCM900 is a couple of degrees F cooler than the first one was at 204-206F.
Coffee taste is a bit better to me...

Posted October 20, 2012 link

It would be nice  if there was a coffee brewer available where you didn't have to buy an extra basket with a hole in it and a thermocouple to find out if the machine was working properly...

oh wait - there is!
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