Schaerer Opal , Solenoid valve gets no current
Posted by: Kaffee-Friend July 11, 2020 01:27 pm
Hello, I am new in this forum and have a problem with my Schaerer Opal.
The solenoid valve directly in front under the marc container gets current after switching on (24 Volt are applied and open) but during the heating up phase the voltage goes away completely and the valve closes again. Then the rinsing process starts and the water is pumped
against the closed valve.
Is this a fault on the control board ? Can it be repaired or replaced ? If so, where can I get one ?
I am grateful for any good advice and information:
)Andreas from Leverkusen
Posted by: Schlawi July 11, 2020 08:45 pm
The front valve is the relief valve. This opens after a brewing operation to allow the residual water of the brewing group to flow into the drip tray.
It should be closed during rinsing.
What happens then when it rinses? Is the non-return valve still intact? I mean the brass block in the back.
Posted by: Kaffee-Friend July 20, 2020 09:25 am
Thank you for the information about the check valve, I was probably misinformed,
the pump runs against resistance during
rinsing, the motor pump noise becomes quieter and there is water in the drip tray under the brewing group. But the brewing group is free and works perfectly in another machine of my colleague.
The rear metal block I had not yet set my sights on.
But when I loosen the hose in front of the front valve, all the water comes towards me with pressure during the rinsing process! Then the rinsing water must also pass through this valve, right? Therefore I also assumed that it should be open.
Posted by: Kaffee-Friend July 20, 2020 09:40 am
Thank you for the information about the check valve, I was probably misinformed,
the pump runs against resistance during
rinsing, the motor pump noise becomes quieter and there is water in the drip tray under the brewing group. But the brewing group is free and works perfectly in another machine of my colleague.
The rear metal block I had not yet set my sights on.
But when I loosen the hose in front of the front valve, all the water comes towards me with pressure during the rinsing process! Then the rinsing water must also pass through this valve, right? Therefore I also assumed that it should be open.
Posted by: Kaffee-Friend July 22, 2020 10:33 am
| QUOTE (Schlawi @ Saturday, 11 July 2020, 19:45 hrs) |
| The front valve is the relief valve. This opens after a brewing operation to allow the residual water of the brewing group to flow into the drip tray. It should be closed during rinsing. What happens then when it rinses? Is the non-return valve still intact? I mean the brass block in the back. |
I have now also replaced the rear check valve, but the problem still exists. There is an obstacle in the pump system and no water comes out of the outlet nozzle during the start rinsing process.
As well as no coffee with the purchase. I must relieve the pressure building up over the steam nozzle with hot water supply to finish the process.
What could still be the reason . All 3 valves changed, circuit board changed, brewing group completely free with screw-on piston. I am helpless
Posted by: Schlawi July 22, 2020 11:09 am
Attached is the watercourse plan. The only thing that can block between pump and brewing unit is the non-return valve.
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