Troubleshooting
Signal Reception (GPS)
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?
Signal reception is not possible unless the watch is in the Stopwatch Mode. Note that signal reception is also disabled in the Airplane Mode. Return to the Timekeeping Mode and/or exit the Airplane Mode.
After checking the above, the watch still cannot perform a receive operation.
GPS signal reception is not possible under the conditions described below.
- During power saving
- While the crown is pulled out
- Timer countdown operation in progress
Q2The second hand remains at “T+P” or “T(TIME)” during the signal receive operation.
The watch may be receiving leap second information.
Q3The 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.
Is the face of the watch pointed straight upwards at the sky?
Minimize movement of the watch while the receive operation is in progress.
When the watch is set up for auto receive, take care to avoid covering the watch face with the sleeve of your clothing.
An alarm started sounding while the receive operation was in progress.
Receive stops if an alarm operation starts while it is being performed. Disable the alarm.
Q4Signal reception should have been successful, but the watch’s time and/or day is wrong.
Is your Home City setting correct for your location?
Change your Home City setting so it correctly reflects your location.
Is the hand and/or day indicator alignment correct?
Adjust hand and/or day indicator alignment.
After checking the above, the time and/or day settings is still wrong.
Adjust time and day settings manually.
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?
Signal reception is not possible unless the watch is in the Stopwatch Mode. Note that signal reception is also disabled in the Airplane Mode. Return to the Timekeeping Mode and/or exit the Airplane 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.
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
- When the crown is pulled out
- 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.
Is the hand and/or day indicator alignment correct?
Adjust hand and/or day indicator alignment.
After checking the above, the time and/or day settings is still 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.
Install the required app on your phone.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 Sharing” “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 2.5 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 2.5 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 2.5 seconds.
Q3I can’t connect while the watch is in the Airplane Mode.
Exit the watch’s Airplane Mode. Then hold down the MODE button (C) for about 2.5 seconds.
Q4I 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 2.5 seconds.
Q5I 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 2.5 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 2.5 seconds.
Has the watch been re-paired with the phone?
After unpairing the watch and phone, re-pair them again.
If you are unable to establish a connection...
Delete the pairing information from the watch, and then re-pair the watch and phone.
Changing to a Different Phone Model
Q1Connecting the current watch to another phone.
Pair the watch with the phone.
Pair the watch with a phone.Auto Time Correction by Bluetooth Connection (Time Correction)
Q1When does the watch sync its time setting with the phone?
The watch will connect with the phone and perform auto time correction 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 correction is complete.
Q2Auto time correction is performed, but the time setting is not correct.
Is auto time correction not being performed according to its normal schedule?
Note that auto time correction is not performed for 24 hours after swapping of the Home Time and World Time, or after the time setting is corrected manually on the watch. Auto time correction will resume 24 hours after either of the above operations is performed.
Is the watch in the Airplane Mode?
Auto time adjustment will not be performed at the scheduled times if the watch is in the Airplane Mode. Exit the watch’s Airplane Mode.
Q3Time 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.
The crown is pulled out.
The alarm will not sound while the crown is pulled out. Push the crown back in to its normal position.
Is the alarm enabled?
Enable the alarm.
Hand Movement and Indications
Q1I don’t know what mode the watch is in.
You can determine the current mode by checking the disk. Use (C) to navigate between modes.
Q2The second hand is jumping at two-second intervals.
Battery power is low. Keep the watch exposed to light until it recharges sufficiently.
Q3All hands are stopped and buttons do not work.
The battery is dead. Keep the watch exposed to light until it recharges sufficiently.
Q4The hands suddenly start moving at high speed.
This is due to the reason (or one of the reasons) below, and does not indicate malfunction. Simply wait until normal hand movement resumes.
- The watch is recovering from a power saving state.
- The hands are moving to their new positions following a GPS signal or time calibration signal receive operation.
- Watch is connected with a phone to correct its time setting.
Q5Hands are stopped and buttons do not work.
The watch is in the charge recovery mode. Wait until the recovery process is complete (for about 15 minutes). The watch will recover more quickly if you place it in a brightly lit location.
Q6Why is the current time indicated by the watch is off by a certain amount of time (nine hours, three hours and 15 minutes, etc.)?
The city setting is not correct. Select the correct setting.
Q7The current time indicated by the watch is off by one hour or 30 minutes.
The summer time setting is not correct. Select the correct setting.
Q8The hand and/or day indicator are not aligned correctly.
Strong magnetism or impact can cause the hands and/or the indicator to go out of alignment. Correct hand and/or day indicator alignment.
Crown Operations
Q1Nothing happens when I rotate the crown.
If you do not perform any operation for about two minutes after pulling out the crown (approximately 30 minutes in the case of hand and day indicator alignment), crown operations will automatically become disabled. Push the crown back in to its normal position and then pull it out again to re-enable crown operations.
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