The manual is available here (click here for user manual
About "Write Error" is says:
Your disc or memory card has some problems in writing data. Disc is shocked while movies is being recorded onto the disc.
To fix the error it says:
To recover previous data in your disc or memory card, turn the power off and on. After recovering data, the system will be switched to STBY mode. If it fails to recover data, "Disc Error" or "Card Error" appear.
Apparently if you get "Disc Error" then the disc has become unusable.
If you have any questions please ask. Thanks for using FixYa