PCB overview

Here you can see a complete overview of the PCB.

YELLOW:

1. Exhaust fan 5 pin connector

2. Extra LED light/24v output

3. LED light window

4. Heater fan

5. Chassis fan (large computer fan at the back)

6. Touch screen

7. Exhaust temperature pt-100

8. Extra temperature pt-100

9. Air temperature pt-100

10. Bean temperature pt-100

RED:

1. Drop handle sensor

2. Charge handle sensor

3. RPM proximity sensor (monitors paddles)

4. Bean cooler warning sensor

5. First crack detection

6. Inlet K-type temperature sensor

7. Drum K-type temperature sensor

8. Wi-Fi antenna

9. Buzzer

BLUE:

1. Exhaust fan 3 pin connector

2. Power heating element (Solid state relay)

3. Bean cooler fan 5 pin connector

4. Bean cooler fan 3 pin connector

5. LED light bean cooler

6. Encoder

7. Chamber motor

8. Drop door motor

9. USB

How to change: S/L100 PCB

How to replace the PCB on your ROEST S100 or ROEST L100.

Sections:

• Where to request new PCB

• Before you start

• Tools

• Parts

• Instructions

Where to request a new PCB?

If you are sure your PCB is not working well (you have talked to our Support Team), visit our e-shop to request a new one!

Before you start

⚠️DISCLAIMER

Information in this document is believed to be accurate and reliable. However, the manufacturer does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of the use of such information. The manufacturer is not liable or responsible for any problems arising from the attempted repair. The manufacturer reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions, at any time and without notice. The manufacturer's products are not designed, authorized, or warranted to be suitable for use in applications where failure or malfunction can reasonably be expected to result in personal injury, death, or severe property or environmental damage. The manufacturer accepts no liability for inclusion and/or use of its products in such equipment or applications and therefore such inclusion and/or use is for the customer’s own risk.

⚠️SAFETY INSTRUCTIONS

• make sure the roaster is turned off

• the power cord has to be unplugged

• follow the steps as instructed below

Tools

2-millimeter and 3-millimeter hexagonal tool

Parts

S100 or L100 PCB. On an L100 PCB, these two black chips must be present.

Instructions

Step-by-step guide:

1. Remove the top plate (remove the hopper before you start).

2. Take a photo or make a reference to the current location of the connections on the PCB. You can use tape or a marker (see the example below).

3. Disconnect all of the cables on the PCB. IMPORTANT! There is no need to cut any cable ties harnessing the cables to the motor bracket. You will detach the cables by pulling them back gently. Use a screwdriver for the following connectors:

Unscrew the bolts

L100: Unscrew the bolts

You can help yourself with a screwdriver to detach this little cable

For the two cables attached by a black retaining clip, push it back and detach the cable. Ensure the retaining clip is left in place at the connection point.

4. Unscrew four off M4 x 6 cap head bolts from the motor bracket. Use the 3-millimeter hexagonal tool.

5. Lift off the PCB slowly. CAUTION! Nylon washers located underneath the PCB could drop inside the machine if not handled carefully. Ensure that the four washers are placed over the threaded holes after this operation. 

6. Remove the new PCB from the bag & place the old PCB in the bag. 

7. Place the new PCB in the original position on the motor bracket. CAUTION! Operate gently to ensure the nylon washers do not fall into the roaster.

8. Secure with four off M4 x 6 cap head bolts. 

9. Reconnect cables as per the image/reference taken. 

IMPORTANT! To make L100 sensors work, the following connections are crucial:

- Drum temperature cable must be connected correctly to work.

• Yellow cable = POSITIVE

• Red cable = NEGATIVE

-Extra proximity sensor cable must be connected to the 4th proximity sensor slot on PCB reading “Sensor0”.

10. Install the top plate.

11. Plug the roaster in, turn it on and test if the PCB has been connected correctly. For L100; if the roaster shows “0” for the drum temperature on the touchscreen, then re-check if the drum temperature cables (step 9) are correctly installed and properly inserted.

12. Once the PCB is correctly installed, please contact the ROEST support team to let us know, so that we can change over to he new PCB in our system.

13. Once your machine is switched over to the new PCB, if you have any problems connecting to the Roest server then please reset the metadata on your roaster. Enter the service menu, tap on ‘Settings’, and then tap ‘Clear Metadata’.

If the roaster doesn’t work properly after following the above steps, contact the ROEST support team for help.