Citizen D710 Instruction Manual page 45

* If "Error" appears on the display or "G.C." remains displayed during garbage collection, there
may be a problem in the flash memory. In this case, after formatting flash memory while
referring to "Formatting Flash Memory", try repeating the garbage collection procedure. If
"Error" is still displayed, the watch may have a malfunction. Please request that the watch be
repaired at the Citizen Service Center.
* Garbage collection is only performed to organize the contents of flash memory. There is no risk
of deleting watch settings or diving logs as a result of performing garbage collection.
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