Troubleshooting
Signal Reception (Time Calibration Signal)
Q1The watch cannot perform a receive operation.
Is the watch’s battery charged?
Signal reception is not possible while battery power is low. Keep the watch exposed to light until it recharges sufficiently.
Is the watch in the Timekeeping Mode?
Time signal receive is performed only while the watch is in the Timekeeping Mode. Return to the Timekeeping Mode.
Is your Home City setting correct for your location?
The watch will not indicate the correct time if the Home City setting is wrong. Change your Home City setting so it correctly reflects your location.
Is the watch connected with a phone?
Auto receive of signals by the watch is disabled while it is connected with a phone.
After checking the above, the watch still cannot perform a receive operation.
Time calibration signal reception is not possible under the conditions described below.
- When watch is at Level 2 power saving
- Timer countdown operation in progress
If successful reception is not possible for some reason, you can adjust the time and day settings manually.
Q2The signal receive operation always fails.
Is the watch in a location that is appropriate for signal reception?
Check your surroundings and move the watch to a location where signal reception is better.
Did you avoid touching the watch while the receive operation was in progress?
Minimize movement of the watch and do not perform any watch operation while a receive operation is in progress.
Is there an alarm configured to sound during the same period that the signal receive operation is performed?
Receive stops if an alarm operation starts while it is being performed. Disable the alarm.
Is the signal transmitter in your area transmitting a signal?
The transmitter of the time calibration may not be transmitting a signal.
Try again later.
Q3Signal reception should have been successful, but the watch’s time and/or day is wrong.
Adjust time and day settings manually.
I can’t pair the watch with a phone.
Q1I’ve never been able to establish a (pairing) connection between the watch and phone.
Are you using a supported phone model?
Check if the phone model and its operating system are supported by the watch.
For information about supported phone models, visit the CASIO Website.
Did you install CASIO WATCHES on your phone?
CASIO WATCHES needs to be installed on your phone in order to connect with the watch.
Are your phone’s Bluetooth settings configured correctly?
Configure the phone’s Bluetooth settings. For details about setting procedures, see your phone documentation.
iPhone Users
- “Settings”
“Bluetooth” On
- “Settings” “Privacy” “Bluetooth” “CASIO WATCHES” On
Android Users
- Enable Bluetooth.
Other than the above.
Some phones need to have BT Smart disabled to use CASIO WATCHES. For details about setting procedures, see your phone documentation.
On the Home Screen, tap: “Menu” “Settings” “Bluetooth” “Menu” “BT Smart settings” “Disable”.
I can’t reconnect the watch and phone.
Q1The watch will not re-connect with the phone after they are disconnected.
Is CASIO WATCHES running?
The watch cannot re-connect with the phone unless CASIO WATCHES is running on the phone. On the phone’s Home Screen, tap the “CASIO WATCHES” icon. Then on the watch, hold down the MODE button (C) for about three seconds.
Have you tried turning your phone off and then back on again?
Turn the phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down the MODE button (C) for about three seconds.
Q2I can’t connect while my phone is in the Airplane Mode.
Connection with the watch is not possible while the phone is in the Airplane Mode. After exiting the phone’s Airplane Mode, go to its Home Screen and tap the “CASIO WATCHES” icon. Then on the watch, hold down the MODE button (C) for about three seconds.
Q3I changed the phone’s Bluetooth from enabled to disabled, and now I can’t connect anymore.
On the phone, re-enable Bluetooth, and then go to the Home Screen and tap the “CASIO WATCHES” icon. Next, on the watch, hold down the MODE button (C) for about three seconds.
Q4I can’t connect after turning off the phone.
Turn on the phone and tap the “CASIO WATCHES” icon. Then on the watch, hold down the MODE button (C) for about three seconds.
Phone-Watch Connection
Q1I can’t establish a connection between the phone and watch.
Have you tried turning your phone off and then back on again?
Turn the phone off and then back on, and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down the MODE button (C) for about three seconds.
Has the watch been re-paired with the phone?
After deleting pairing information from CASIO WATCHES, re-pair them.
If you are unable to establish a connection...
Use the procedure below to delete the pairing information from the watch, and then re-pair the watch and phone.
Hold down (A) for at least two seconds until [HT] starts to flash.
Press (C) twice.
Hold down (B) for at least three seconds. Release the button when [CLR] appears.
Changing to a Different Phone Model
Q1Connecting the current watch to another phone.
Pair the watch with the phone.
Auto Time Adjustment by Bluetooth Connection (Time Adjustment)
Q1When does the watch adjust its time?
The watch will connect with the phone and perform auto time adjustment at around 12:30 a.m., 6:30 a.m., 12:30 p.m. and 6:30 p.m. The connection is automatically terminated after auto time adjustment is complete. Also, time signal auto receive will be performed if there has been no auto time adjustment based on connection between the watch and phone for more than one day.
Q2Auto time adjustment is not performed at a scheduled time.
Is auto time adjustment not being performed according to its normal schedule?
Note that auto time adjustment is not performed for 24 hours after swapping of the Home Time and World Time, or after the time setting is adjusted manually on the watch. Auto time adjustment will resume 24 hours after either of the above operations is performed.
Is a timer countdown operation in progress?
Auto time adjustment will not start at the scheduled times if a timer countdown operation is in progress. Stop the timer countdown operation.
Is auto time adjustment enabled?
Auto time adjustment will not be performed at the scheduled times unless it is enabled. Enable auto time adjustment.
Q3The watch does not connect with a phone and adjust its time when I press (D).
The watch will not adjust its time if you press (D) while a timer countdown operation is in progress. Stop the timer countdown operation and then press (D) again.
Q4Time is not displayed correctly.
The phone’s time setting may be incorrect because it is unable to connect with its network due to being out of range, etc. If this happens, connect the phone to its network and then adjust the time setting.
Alarms
Q1The alarm does not sound.
Is the watch’s battery charged?
Keep the watch exposed to light until it recharges sufficiently.
Is the alarm enabled?
Enable the alarm.
Top of page