The start button heated the water and went through the full cycle. then the ring light quit blinking and the serve button was pushed. the pump started, but makes a subdued sound compared to the sound it makes when working properly. it sounds as though the pump is clogged. is there a procedure to clean the pump system?
Yes, it is called descaling. Use a descaling solution, or vinegar and water, and follow the procedure for flushing your machine. After that, re flush it with plain water- nothing worse than vinegary coffee!
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You didn't indicate a specific model. So, I'm going to assume yours is relatively the same as my JWX27.
Let me start by clarifying what the red light indicates.
A solid red light indicates the cleaning cycle is in progress. A blinking red light indicates the coffeemaker is off, but due to be cleaned. When the coffeemaker is due to be cleaned, the red light will continue to blink while the coffeemaker is off until the cleaning cycle has been completed fully. The entire cleaning process takes about an hour and a half. And, it is not intuitive. So, here are my instructions.
With the coffeemaker off (with the red light blinking), pour four cups of pure white vinegar (no water added) into the reservoir. Don't short the amount. You'll need four cups to complete the cycle. Remove any filters, but leave the strainer basket in place. Tap the "select" button three times until the red light is on (and stays on, not blinking). The cleaning cycle now begins. It should take between 45 minutes and an hour to complete. Don't be concerned about the 30-minute long pause during the cycle when nothing happens. This is intentional and part of the cycle.
After the cleaning cycle has completed, get rid of the vinegar. Rinse out the strainer basket and the coffee pot. Run a full pot of clean water thru a regular brew cycle (with the pot and basket in place, of course). Then, dump the water, rinse the pot and basket again, and run another full pot of clean water thru a regular brew cycle. Dump that water too. And, you're done!
If the water tank stays full it indicates that the pump cannot function properly. Before first use, the Sirena pump needs to be 'primed'. This is indicated by the blinking blue 'water' LED. On a new machine (or a refurbished one as in my case), empty the water container first, then
remove the plastic water container
activate the small spring valve mechanism built into the bottom of the water tank. This plastic valve mechanism could initially be hard to depress, because the small metal spring is too strong, or the entire mechanism may be stuck altogether. Exercise this spring and the small valve a few times (ok: 10 times).
once the spring-loaded valve moves freely (it becomes easy to depress with your finger), the pump will have no problem activating the spring mechanism and starts sucking water out of the tank:
refill with filtered water almost to the top and observe the floating magnet (fill indicator) now in its UP position. You will have to refill the water after a few shots and using steam.
Press the ON/OFF button and open the steam knob clockwise all the way until you can hear the pump working and a steady stream of water escapes... onto the floor, or if you're smart, into a small container.
Once primed, the pump can operate and in turn, the machine starts heating up.
Now you can make your espresso, and even try the steam wand after it shoots out a short stream of water. Once you have steam coming out of the wand, you can start getting serious about making your brew...
I believe that a lot of problems, like failure to heat up, machine doesn't work, etc. are caused by this small spring mechanism being a little hard to operate initially. The Sirena is programmed to operate ONLY if it can extract water out of the tank.
Try it and enjoy the superb cappucino, espresso, etc. -the beautiful Sirena was born in Italy and is a little temperamental, but will be your best friend with a little help in the mechnical department (Think FIAT). By the way: I am a German engineer -no kidding.
• All lights will blink the first time you turn on your machine. This is your cue to prepare your machine for use by following the quick instructions in Step 1 on separate insert. • If the water level runs low while you are preparing a beverage, all lights will flash. Simply remove and refill the water container, and brewing will continue automatically where it left off. It should not be necessary to discard the T-DISC and start over. • The AUTO light will blink throughout the brewing process. Some drinks require a pause in brewing as part of the recipe for brewing your perfect cup - this is to allow the optimal flavors to unfold and is a normal part of the brewing process. The AUTO light will continue to blink throughout this process.
HOW TO MAKE A DRINK • Place the mug of your choice on the cup stand. • When the STANDBY light illuminates, insert the T-DISC® of your choice and close the clamp. • The HEATING light will blink as the brewer heats the water to the optimal temperature for your drink. • Once the proper temperature is reached, the AUTO light will illuminate. When it lights up, press the start/stop button to begin the brew cycle. • The AUTO light will continue to flash throughout the brewing cycle. PLEASE NOTE: Some beverages have a pause in brewing after the initial influx of water into the T-DISC®. • The MANUAL light will illuminate when your drink is ready.
The reason could be the following.
You used your machine on a mains working with 50 cycles/sec. In U.S. frequency is 60 cycles /sec. this could alter the working of the oscillating piston in the pump. The impedance of the coil is somehow about 20% higher on this mains, reducing so current and power of the pump.
To be quite shure of this, try to fill the pump thoroughly with water.
(Disconnect machine from mains, use Low pressure hose , max 0,5 bar, tied to the inlet -where the water tank feeds-, and fill until water comes out of the open hood)
If now the same humming persists an no pumping effect is noticed, i even will be a bit wiser knowing that 60Hz is not good to 50 Hz pumps.
The same thing happened to our Mr. Coffee this week! I followed the instructions about running vinegar through, then rinsing several times with water. However, the light would not stop blinking. We did by-pass the light by setting the timer for delayed brewing and it worked. However, that blinking light came on again. Then, my husband tired the vinegar wash again but instead of doing it one time, he ran the same vinegar through 6 times until the light went out! Then he proceeded with the water rinse. Our Mr. Coffee is working again!