Group Magnet Switch Troubleshooting - Espresso Series

Group Magnet Switch Troubleshooting - Espresso Series


Group Mag Switch Troubleshooting
Espresso V3 & Single Group


Objective:
Inside the group head is a tongue with a magnet installed on it. This magnet comes in contact with the magnetic reed switches which send signals to the relays for brewing. Occasionally, those switches can weaken or stick. This guide shows how to test their functionality.
The main body of this guide will show the Espresso V3. The Single Group will have the same procedure, but it's important to note that both mag switches on the Single Group are N/C
Time:
10 minutes

Tools:
#3 Philips Head Screwdriver
#1 Philips Head Screwdriver
Magnet
Multimeter

Parts:
30000-20032 Mag Switch, N/C, pinned
30000-20042 Mag Switch, N/O, pinned
30000-32010 Molex Mini-Fit Jr Receptacle Housing, 2x1 (M)

Procedure

Step 1:
Turn off the machine power switch.

Step 2:
Loosen group cap screws, remove group cover and set aside.


Step 3:
Place a magnet against the switches on the right. (Off position)


Step 4:
Remove cup tray and upper front panel and set aside. Make sure hot water switch is detached before moving upper front panel.


Step 5:
Identify the magnet switches that correspond with the faulty group. They are typically matched with color-coded bands.


Step 6:
Disconnect the Molex plugs that match the switches in the right position. Place the multimeter probes into each port of the male Molex connection.


Step 7:
With the multimeter set to continuity, test the continuity of each switch. With the multimeter leads on the Molex pins, remove the magnet from the magnet switch. Verify the continuity changes once the magnet and the switch are separated. 
  1. The two switches on the right are N/C (Normally Closed) meaning they should only be active and have continuity when a magnet is not present. Conversely, there is no continuity when a magnet is present.
  2. The switch on the left is N/O (Normally Open) meaning it should only be active and have continuity when a magnet is present. Conversely, there is continuity when a magnet is present.

Since the V3 has individual switches for the pump and brew valves, it is extremely important to make sure both N/C switches are aligned and responding to the magnet in the off position.
If misaligned, it's possible the brew valve or pump will run in the off position. Make sure both are disengaged when the group is off. 

The continuity should reliably change based on the presence of the magnet.


If a switch does not change with the presence of a magnetic field, it has likely failed and should be replaced. 


    Questions or concerns? Please contact: support@slayerespresso.com
    To order parts, click here.



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