I just replaced the heating element in my mega IIC. I turned on the machine with the water level probe wire disconnected to fill the boiler. After the startup selft test, the water pump turned on, but flowed through both group heads as if I had hit both buttons at the same time. I've never seen this happen. My concern is that if I don't get the boiler filled, I'm going to burn up the heating element.
Go ahead and keep the sensor probe connected. Open up the steam wands before turning the machine on the let the air bleed off as it fills. The element should not turn on if the water level is too low and the circuit is working properly. As for the groups pumping water, try hitting the Brew Stop buttons. If that doesn't work, something may be wired wrong, or your group solenoids may be stuck.
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The easiest way to check the element is to remove electrical wires and then check for resistance on the element. Also you might want to check the pressure stat(its the black box with wires leading to the element and tube to the boiler).
There is either 1 of 2 things going on: 1 - The machine does not need water or 2 - The inlet solenoid is damaged.
If the boiler is full the machine will not call for water, to test this you could remove the top panel and disconnect the level probe, then turn the machine on, if it calls for water then the boiler was full and it did not need anymore. If it does not call for water then the inlet solenoid is possible damaged. To Check the inlet solenoid which is on the bottom right of your machine, you can do a resistance check on the coil, to make sure it is working, and or loosen the output of the solenoid to see if water is flowing when it is calling for water.
Check the wire on the water reservoir to make sure that it is properly connected.
Check to make sure the wire connection is clean and making good contact.
If the machine turns on the connection is dirty, so you will need to remove nut and clean.
There is a level probe on top of the boiler (actually 2) The right one (yellow wire) is the low level probe and it will not let the boiler turn on unless it sences water at the probe. If it is scaled it can't tell if there is water in the boiler and the element will not heat. Remove and clean the probe.
If it does that every time the pump is on then it is possible that the pump needs to be repaired or it is set too high for pressure possible past 10 bar, if it does it only when running a specific grouphead then your solenoid needs to be replaced.
Hi, I'm new to the coffee business and justed purchased this machine and no manual as well.
I just called the astra manufacturer (1-877-340-1800 ) and they were going to e-mail me a manual free of charge. Hope this helps. J Howell
The left grouphead sounds like a different problem than the right group head. For the left grouphead, I would start by replacing the group electro-valve. With hard water, this can cause the valve to remain in the closed position even though the water pump is running.
For the right group head, I would want to see this happen. Usually, if the gaskets haven't been replaced in a while (if you are busy, your 'while' may be quicker than others), I would evaluate the condition of the rubber gasket. I would also look at whether you are tamping too much espresso grounds into the portafilter. This can cause a similar symptom as a bad gasket.