If there are modem or USB connection problems, one possible solution would be to set the CPU speed to Normal.

The CPU speed can be changed either by using USB stick or from the back-end.

Step-by-step guide when using USB stick

Add the steps involved:

1. Create compatible USB stick
2. Download and extract the attached zip file to the root of the memory stick
   
3. USB stick configuration
4. Now the CPU board is set to Normal

Step-by-step guide for using back-end and OCPP ChangeConfiguration request

Add the steps involved:

1. Send ChangeConfiguration request to the charger with the following key and value:
   key: CPUPerfMode
   value: 1
2. If the charger has two socket outlets, like EVB200, EVF200 or EVC200, the send also the following key value pair:
   CPUPerfMode_2
   value: 1
3. Send HardReset command to the charger
4. Now the CPU board is set to Normal

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