List of error codes

• The name of the scale does not appear in the Bluetooth list
• Bluetooth connection failed
• The WiFi icon does not appear on the scale
• Lo
• Er0, Er3, Er6, Er7, Er8
• Er1
• Er2
• Er5
• The screen displays “----“

Make sure the scale is in SET status.
If the problem persists, remove and replace the batteries and press the SET button.

Turn off then turn on Bluetooth and restart the connection.
If the problem persists, reboot your smartphone.

If the WiFi icon does not appear during installation of the scale on your network and after entering your WiFi key, please try the following procedure:

1. Restart your router/internet box. Make sure that your smartphone is properly connected to your home WiFi network.
2. If you have configured MAC address filtering on your router, make sure that the scale's MAC address has been added to the list. 
3. Start the iHealth MyVitals app and sign in to your account.
4. Go to MENU > Set up my devices > Select a new device > Scales > HS5 > Scan the QR code.
5. Open the battery compartment, remove and replace the batteries then press and hold the SET button until the "SET" message appears on the scale's screen.
6. Click Next until you find your HS5 scale.
7. Select your HS5 scale and press Connect a device.
8. Enter your case sensitive WiFi password then press OK.
9. The WiFi icon starts flashing on the scale. Once the WiFi connection is established, the WiFi icon will display steady and the message SET disappears and is replaced by 0.

Make sure the batteries are installed correctly.
If the problem persists, try with a new set of batteries.

Remove the batteries. Wait 1 minute and insert a new set of batteries.
If the problem persists, please contact technical support.

The user's current weight is outside the measuring range (5 - 150Kg).

The weight measured by the scale is not stable. Place your feet correctly in the middle of the scale and stay still during the measurement.

Data synchronisation with the Cloud failed.

1. Restart your router/internet box. Make sure that your smartphone is properly connected to your home WiFi network.
2. If you have configured MAC address filtering on your router, make sure that the scale's MAC address has been added to the list.
3. Start the iHealth MyVitals app. Log in to your account and in your profile (MENU > Edit profile) check that your weight is within +/-3kg of the weight measured by the scale. Correct the weight in your profile if not.
4. Return to MENU > Set up my devices > Select a new device > Scales > HS5.
5. Open the battery compartment, remove and replace the batteries then press and hold the SET button until the "SET" message appears on the scale's screen.
6. Click Next until you find your HS5 scale.
7. Select your HS5 scale and press Connect a device.
8. Enter your case sensitive WiFi password then press OK.
9. The WiFi icon starts flashing on the scale. Once the WiFi connection is established, the WiFi icon will display steady and the message SET disappears and is replaced by 0.
10. A user number (from 1 to 20) is assigned to you. You can find your user number by going to MENU > Set up my devices > HS5 (the scale must be connected to the app). Remember this number, as it will be used to identify you during offline measurements if several users registered on the scale have approximately the same weight (within +/-3kg).
11. The scale will automatically download the information from your profile. This operation can take a few seconds.
12. Place your bare feet on the 4 electrodes and wait a few seconds while the scale takes the measurement of your weight and body fat. The silhouette icon visible when displaying your body fat indicates that the scale has recognised a user.
13. In the app, go to MENU > Weight and tap the synchronise button to view the results of the measurement.

The scale can't detect the body impedance. Make sure your bare feet are correctly placed on the 4 electrodes.
If problem persists, try to make an online measurement being connected to your own iHealth account.

*credit to Sylvain of iHealth Labs EU
https://helpcenter.ihealthlabs.eu/hc/en-gb/articles/115005874629-iHealth-HS5-List-of-error-codes