Hello, Unfortunately, E01 is an error meaning a problem with a component internally that is not repairable. Please contact the customer service team for further .
The drive unit is probably not seated correctly. It must be pushed down when reassembling in order to keep the motor contacts in the correct position until the case is secured
If error persists reset the thermometer by removing the batteries and putting them back in. If error still persists contact your Welch Allyn representative. To change default temperature scale: With the device off, press and hold the button for about 5 seconds. Release the button when desired scale is shown.
Your shaver is a 'Series 9' type. There are many Series 9 models. Only the models with 'cc' following the model number are compatible with the clean and charge station. Models with 's' following the model number are NOT compatible with the cleaning stations
It is hard to say for sure which component on the circuit board is burned. But, if the shaver will not work after putting the battery in the correct way, it has been damaged beyond repair.
It is a little late for this advice but it is always a good idea to note the polarity of the battery before removing the old one(s)