I have replaced the contactor in my machine. The machine does not switch on unless I press the black button on the rear of the contactor. After the swich is turned on with the button depressed the machine stays on until it is switched off. I'm wondering if there is some sort of aparatus which holds the black button in on the rear panel. Thanks, Tom
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Re: Contactor for La Pavoni Pub 2 espresso machine
1>Tom you must pay atention on electrical suply if coil of contactor, your contactor gets suply of electric wich passes through the contactor. 2>please go back to contactor and pay atention to coil suply you must have mistaken there something. 3> if it isnt visible than study the old contactor, was he 3 closed 1 open contact or 4 closed???? it can be that too, the contactor could not be with the same function.
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Sounds like a pressure switch. Have you tested continuity on the switches? If no multi meter put a jumper on HP and LP. (HIGH AND LOW PRESSURE) Turn system back on. If contactor pulls in...bingo! Do not leave jumpers on, get the freon problem fixed. Hopefully high pressure problem ;) Good Luck!!
There is a resettable breaker inside the machine that cuts off power to the plasmahead when tripped. Check that and make sure the head is secore to cable and cable is secure to machine.
If it still fails to function check the coil in the contactor to make sure it has not burned out. Also check the pressure switch to make sure it closes contacts to make the circuit when the unit is pressurized If switch is not functional the head will not operate. Also check gas solenoid or solenoids to make sure they do not have burned out coils as well. An Ohmmeter should show about 2000 ohms give or take some. The main contactor winding also. It may be the main contactor needs replacement- a loose power connection can lead to burned contacts. So if you hear the machine click when you press the trigger, but no power to head, and all the other items mentioned still leaves you with no power at the head, that main contactor is the likely culprit.
If IGBT's had failed- they would blow apart part of their plastic case.So a quick visual is usually adequate for those.
the contactor does not have a reset button 24 volts will energize a magnet and pull the contactor in you can also manually push in the contactor for testing purposes the airhandler has the transformer which produces 24 volts this power then goes to the tstat then you select a mode which then goes to the contactor you most likely have a blown fuse on the circuit board or simular problem the contactor could have shorted causing this
Please switch the machine off.
While holding down 8+0 buttons switch the machine on.
When the machine is in test mode, input 400 and press the start button, input 0 and press enter on the display.
Switch off the machine wait 1 minute and switch the machine on.
If the error reappears the thermistors and thermo need fuses need to be replaced.
Open the control box and see if you have around 220-240V at the bottom of the contactor. The contactor is the switch looking thing in the bottom. If the unit is calling for air it should have a button in the middle that is pulled in. If you are not getting the volts at the contactor then you need to find the electrical problem. If you have the correct voltage then look and see if the contactor is connected. The middle button should be pulled in. If you have one where you are unable to see the button, or it is not pulled in, Check the low voltage wiring. This is done by checking to see if there are 24V-28V on the side terminals of the contatcor. These terminals are located on the sides of the contactor. (some contactors have both sides of the 24V on one side.) Either way you should read 24-28V when checking across the two terminals. If you do not then you have a problem with the control wiring. (cut with weed eater, chewed by mouse etc.) I know the 24V coil is good because the inside unit is running. If the contactor is pulled in and the outdoor unit still does not run check and see if there is power at the other end of the contactor. (The end the switch breaks off) If the switch is pulled in (or you read 24- 28V on the side of the contactor, and there is 240 V coming in on the line. Chances are you need to replace the contactor. Disconnect the power and pull one wire at a time of of the old contactor and install it on the new. After all of the wires are on the new one, remove the old contactor and throw it away. Screw the new contactor with all of the wires back onto the unit. restore power. Often times in our part of the country, there will be ants stuck in the points of the contactor. Just cleaning the contactor will buy more time. Hope this helps.
Sounds to me like the start switch contacts are welded shut.If you have a multimeter set it to ohms,remove 1 wire from the switch,put your meter leads across the switch and if you get a reading that switch is bad.If you dont get a reading i would check the side switch on the contactor.Im a hobartt tech and repair these mixers alot.Let me know.
Power off the machine, switch on while pressing 0 & 8, enter 200, then press the start button, the machine will run for about three minutes to adjust the Toner sensor. The machine will stop, press the interupt button to save the setting, switch off and then on.
If the older techies is reading this, please help to confirm.