BYD battery error code 4
BYD uses code 4 in more than one product range, and it doesn't always mean the same thing. Check which range your battery belongs to below.
WattMate is not affiliated with BYD. This page summarises BYD's own published documentation; your installer and BYD are the authority on your system. WattMate doesn't repair systems or make site visits.
As documented for Battery Box
- Meaning
- Battery sensor failure
- Likely cause
- Malfunction in battery sensor hardware.
- What the manual says to do
- Seek assistance from an installer to check and replace the battery sensor.
- Manufacturer's severity
- Critical
BYD's documentation says this one needs your installer.
Extracted from BYD's published manual. Check it against the manual for your model. Open the source document
As documented for Hvm
- Meaning
- Battery sensor failure
- Likely cause
- The battery sensor is malfunctioning.
- What the manual says to do
- Check sensor connections or replace the sensor if necessary.
- Manufacturer's severity
- Critical
BYD's documentation says this one needs your installer.
Extracted from BYD's published manual. Check it against the manual for your model. Open the source document
As documented for Hvs
- Meaning
- Battery sensor failure
- Likely cause
- Fault in the battery sensor's functionality
- What the manual says to do
- Contact installer for further diagnosis and repair
- Manufacturer's severity
- Critical
BYD's documentation says this one needs your installer.
Extracted from BYD's published manual. Check it against the manual for your model. Open the source document
As documented for Lvl
- Meaning
- BMS failure
- Likely cause
- Battery Management System malfunction
- What the manual says to do
- Contact installer immediately
- Manufacturer's severity
- Critical
BYD's documentation says this one needs your installer.
Extracted from BYD's published manual. Check it against the manual for your model. Open the source document
As documented for Battery Box Hvb
- Meaning
- Battery sensor failure
- Likely cause
- Faulty sensor or connectivity issue
- What the manual says to do
- Check the battery connections; if the problem persists, contact the installer.
- Manufacturer's severity
- Warning
Extracted from BYD's published manual. Check it against the manual for your model. Open the source document
As documented for Hve
- Meaning
- Battery sensor failure
- Likely cause
- Faulty sensor within the battery system
- What the manual says to do
- Restart system and check sensor connections.
- Manufacturer's severity
- Warning
BYD's documentation says this one needs your installer.
Extracted from BYD's published manual. Check it against the manual for your model. Open the source document
When to call your installer or the warranty line
Your installer is your first warranty contact. If they've gone, the manufacturer's warranty line still covers the hardware. Don't open the inverter or battery case yourself: work inside it is for a licensed electrician.
If you see smoke, scorch marks or smell burning, switch the system off at the AC and PV isolators and call your installer. If anyone is in danger, call 000.
- BYD warranty phone
- +61 2 8005 6688
- BYD warranty email
- service@alpspower.com.au
- BYD service network
- Open the manufacturer's service page