Receive failed
If there was a previously successful reception
If no reception was successful
•If the current reception fails but a previous reception was successful, the display shows the previous reception’s date and time, and the
ERR indicator. 
indicates that none of the reception operations were successful.
The watch will enter the Receive Mode without changing the time setting if you press A or if you do not perform any button operation for about one or two minutes.
Note
•To interrupt a receive operation and return to the Receive Mode, press A.