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 Calendar Mode?
The watch cannot receive time calibration signals while the Airplane Mode is enabled or while the watch is in a mode other than the Calendar Mode. Return to the Calendar Mode.
Is your time zone setting correct for your location?
The watch will not indicate the correct time if the time zone setting is wrong. Change your time zone setting so it is correct for your location.
Is the watch paired with a phone?
The time calibration signal auto receive operation is not performed while the watch is paired with a phone. (However, time signal auto receive is performed if there has been no time adjustment based on connection between the watch and phone for more than one day.)
Also, a manual time calibration signal receive operation cannot be performed while the watch is paired with a phone. When you want to enable time calibration signal reception without using a phone, unpair the watch from your 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.
- While the watch is at Level 3 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 indicated time off by one hour or by 30 minutes?
The watch may be using the wrong time offset. Correctly specify the time zone where you are using the watch.
Is the indicated hour and/or minute wrong?
The hour hand and/or minute hand may be out of alignment. Perform the procedure under “Adjusting Hand and Day Indicator Alignment” to auto adjust hour and minute hand alignment.
Is the indicated day of the week wrong?
The day of the week hand (mode hand) may be out of alignment. Perform the procedure under “Adjusting Hand and Day Indicator Alignment” to adjust mode hand alignment.
Is the indicated Dual Time and/or alarm time wrong?
The Dual Time and/or alarm time hands (small hour hand, small minute hand) may be out of alignment. Perform the procedure under “Adjusting Hand and Day Indicator Alignment” to adjust small hour hand and small minute hand 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 the CASIO WATCHES phone app on your phone?
The CASIO WATCHES phone app 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” “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 the CASIO WATCHES phone app running?
The watch cannot re-connect with your phone unless CASIO WATCHES is running on the phone. On the phone’s Home Screen, tap the “CASIO WATCHES” icon. Next, on the watch, hold down (D) for at least 0.5 seconds until the second hand points to [C].
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 (D) for at least 0.5 seconds until the second hand points to [C].
Is a timer countdown operation in progress?
Connection with a phone is not possible while there is 30 seconds or less remaining on a countdown timer operation. Stop the countdown operation before connecting with the phone.
Q2I can’t connect while my phone is in the Airplane Mode.
Connection with the watch is not possible while the phone’s Airplane Mode is enabled. After disabling the phone’s Airplane Mode, go to the phone’s Home Screen and tap the “CASIO WATCHES” icon. Next, on the watch, hold down (D) for at least 0.5 seconds until the second hand points to [C].
Q3I changed the phone’s Bluetooth from enabled to disabled, and now I can’t connect anymore.
On the phone, turn Bluetooth off and then back on, and then tap the “CASIO WATCHES” icon on the Home Screen. Next, on the watch, hold down (D) for at least 0.5 seconds until the second hand points to [C].
Q4I can’t connect after turning off the phone.
Turn on the phone and then tap the “CASIO WATCHES” icon. Next, on the watch, hold down (D) for at least 0.5 seconds until the second hand points to [C].
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 (D) for at least 0.5 seconds until the second hand points to [C].
Is the watch’s Airplane Mode enabled?
Connection with your phone is not possible while the watch’s Airplane Mode is enabled. To connect with your phone, disable the Airplane Mode.
Has the watch been re-paired with the phone?
Delete the pairing information from the CASIO WATCHES phone app and your phone (iPhone only), and then re-pair them.
Pair the watch with a phone.If you are unable to establish a connection...
After deleting pairing information from the watch, re-pair it with your phone.
Changing to a Different Phone Model
Q1How do I connect my watch to a different phone?
Delete the pairing information from your watch and then pair it with the phone you want to connect with.
Auto Time Adjustment by Bluetooth Connection (Time Adjustment)
Q1When does the watch adjust its time?
Your watch can connect with a paired phone to adjust its time setting. Auto time adjustment is performed at the times described below.
- After your phone’s time zone or summer time setting is changed
- After 24 hours or more have passed since the last time adjustment using Bluetooth connection
- After 24 hours or more have passed since city swapping using CASIO WATCHES or watch operation
- After 24 hours or more have passed since the last home city change or time adjustment using watch operation
Q2Auto time setting is not correct.
Is there a Bluetooth connection between the watch and your phone?
To preserve battery power, the watch will automatically terminate Bluetooth connection with your phone temporarily if it detects the connection has been unused for approximately one hour. Auto Time Adjustment is disabled while there is no connection. To reconnect, press any watch button or angle the watch towards your face.
Have 24 hours or more passed since the last time adjustment using Bluetooth connection?
Time adjustment using Bluetooth connection is performed once every 24 hours. Auto time adjustment will be performed when 24 hours or more have elapsed since the last time adjustment operation.
Have 24 hours or more has passed since the last manual time adjustment, city change, or city swapping operation?
Auto time adjustment is not performed for 24 hours after a manual time adjustment, city change, or city swapping operation. Auto time adjustment will resume after 24 hours or more have elapsed after either of the above operations is performed.
Is the watch’s Airplane Mode enabled?
Connection with your phone is not possible while the watch’s Airplane Mode is enabled. To connect with your phone, disable the Airplane Mode.
Q3Even if I hold down (D) for at least 0.5 seconds, the watch does not sync its time setting with my phone.
Connection with your phone is not possible while the watch’s Airplane Mode is enabled. To connect with your phone, disable the Airplane Mode.
Q4Time is not displayed correctly.
If your phone is unable to receive a signal because you are outside its service range or for some other reason, the watch may not be able to display the correct time. If this happens, connect the phone to its network and then adjust the time setting.
Q5Time signal reception is not performed while watch is connected with a phone.
The watch does not receive a time signal for time correction while it is connected with a phone. However, time signal auto receive is performed if there has been no auto time adjustment based on connection between the watch and phone for more than one day.
Diving Function
Q1I can’t enter the Dive Mode.
The watch will not enter the Dive Mode while its charge is low or dead. Charge the watch before using it for diving.
Q2The watch enters the Calendar Mode when it switches from dive time measurement to surface interval measurement.
If the watch charge becomes low while it is in the Dive Mode, it will not be able to perform surface interval measurement. Charge the watch before using it for diving.
Tide Level
Q1Tide level information is not displayed when I enter the Tide Graph Mode.
To check a tide level, use CASIO WATCHES to specify a port.
Alarm
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 mode hand position. 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.
- A time calibration signal is being received and the time setting is being adjusted.
- Watch is connected with a phone to adjust 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. Adjust hand and/or day indicator alignment.
- Check the information below to find out how to align the hands and/or day indicator manually.
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.
Top of page