I have owned this machine for 5 years and has been totally reliable and I know it quite well as a member of the family. BFC Semi-Auto with 3 red rockers, absolutely great machine.
My problem is.......
Last week I noticed the manometer rising above its normal range of 1.0 to 1.2 .... to 1.6+ not regularly but once every now and then.
I decided to do a descale as this was 8 months overdue even though mushroom was fairly clean. After the descale was complete I thought it time to check brew temp with thermocouple via group inspection hole.
This revealed machine was running cool only hitting 88* at height of a pour...... Previously set to 93-94*
After some time spent adjusting pressurestat (PS), machine would only hit 90* even when PS was wound in to operate between 1.5 and 1.7 ( way too high).
Pressurestat is a Ma-ter XP700. I concluded that the initial problem was burnt and sticking contact points. These I took apart and cleaned ( quite sooty),after this the PS and contact points worked well and quiet,... BUT when set at the old PS range 1.0-1.2 temp was only 86*........ Winding it up to 1.5 again would only just hit 90*
I now need a bit of advice as to where to next..... ! My thoughts now are to replace the Pressurestat as it may have a degraded diaphram !... BUT I'm not 100% sure this will cure the problem.
Your thoughts and diagnostic skills would be appreciated.
***I should add that the relay on this pressurestat failed about a year ago , but with advice from one of our sponsors I was able to bypass, with no ill effects ( worn contact points maybe) but enjoyed the silent running without the loud CLICK of PS cutting in and out ........
Cheers
Greg
My problem is.......
Last week I noticed the manometer rising above its normal range of 1.0 to 1.2 .... to 1.6+ not regularly but once every now and then.
I decided to do a descale as this was 8 months overdue even though mushroom was fairly clean. After the descale was complete I thought it time to check brew temp with thermocouple via group inspection hole.
This revealed machine was running cool only hitting 88* at height of a pour...... Previously set to 93-94*
After some time spent adjusting pressurestat (PS), machine would only hit 90* even when PS was wound in to operate between 1.5 and 1.7 ( way too high).
Pressurestat is a Ma-ter XP700. I concluded that the initial problem was burnt and sticking contact points. These I took apart and cleaned ( quite sooty),after this the PS and contact points worked well and quiet,... BUT when set at the old PS range 1.0-1.2 temp was only 86*........ Winding it up to 1.5 again would only just hit 90*
I now need a bit of advice as to where to next..... ! My thoughts now are to replace the Pressurestat as it may have a degraded diaphram !... BUT I'm not 100% sure this will cure the problem.
Your thoughts and diagnostic skills would be appreciated.
***I should add that the relay on this pressurestat failed about a year ago , but with advice from one of our sponsors I was able to bypass, with no ill effects ( worn contact points maybe) but enjoyed the silent running without the loud CLICK of PS cutting in and out ........
Cheers
Greg


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