First thing I would do is reset the code. Its like a C250, you turn off the main power, hold down the utility key until the trouble reset shows on the screen, then you shut off the main power again and turn back on. I had the error before and I had to rewrite the firmware to fix it. Haven't seen it on the machine for 2 years or more now. Here it is from the manual.
1.
Turn OFF the Main Power Switch.
2.
Turn Main Power Switch ON again while pressing the Utility/Counter key more than
10 seconds after.
3.
Touch [Trouble Reset].
4.
Check to make sure that [OK] is displayed and the it has been reset.
5.
Turn off the Main Power Switch and turn it on again more than 10 seconds after, and
make sure that the machine properly starts.
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