Error code C0500 and C0501 means Fixing unit's temperature abnormality.
How to reset these codes?
To reset Error codes C0500 and C0501, perform the following steps.
1-Turn the machine "OFF".
2-Press the "STOP" button on the basic panel.
3-Keep the button pressed and turn the machine "ON".
4-Do not release the button, until the machine warm up.
5-After few seconds Error code will remove and machine will reset.Basic menu will show no error on LCD screen.This means error code has been removed and photocopier machine is ready to use.