The Manager30 may display –40°C on the Manager30 or RedVision monitors if the battery sensor is disconnected or faulty.
In this state, the system will not charge the secondary battery. The issue is usually caused by damaged wiring or a failed temperature sensor. Troubleshooting involves performing a hard reset by disconnecting all power sources, removing and reconnecting the battery sensor and green connector, then reconfiguring the system.
REDARC recommends seeking the support of a qualified auto electrician or technician.
Important
For your safety, REDARC recommends installation by a qualified technician. Seek support from a REDARC recommended dealer or installer - Find Your Local Installer
This information is applicable to the following products:
- Manager30 Battery Management System (BMS1230S3, BMS130S3-xx)
- Manager30 Battery Management System with RedVision Pro Display (BMS1230S3R, BMS1230S3R-xx)
What does this fault look like?
Manager30 Display
RedVision Pro Display
Why is it displaying -40°C?
The Manager30 utilises a battery sensor assembly which monitors battery vitals including battery temperature. If the battery sensor becomes disconnected the temperature reading defaults to –40°C.
Will the battery management system still charge my battery in this condition?
As the Manager30 thinks the battery is -40°C, it will not charge the secondary battery until this problem is rectified.
What can cause this symptom?
The most common cause is from damaged battery sensor wiring or a damaged temperature sensor.
How to confirm if the battery sensor is faulty?
Important
In this article we explain the need for testing to determine the cause of the issue. Testing may involve changes to the installation or wiring. For your safety and accuracy, REDARC recommends engaging a REDNetwork member or a suitably qualified auto electrician - Find Your Local Installer
Perform a hard reset procedure on the Manager30 including a removal and reconnection of the sensor.
- Ensure all charging sources are disconnected.
- Unplug the Green connector on the Manager30 charger assembly.
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Disconnect the battery sensor red connection on the secondary battery.
- Leave disconnected for minimum of 60 seconds (we recommend leaving for 5 minutes to ensure complete power cycle).
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Reconnect the battery sensor red connection on the secondary battery.
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Reconnect the green connector to the Manager30 charger assembly.
- Reset date/time and battery setting on the Manager30 monitor.
- Recheck operation.
If the Manager30 is reset and sensor reinstalled but the excessive temperature readings persist, please contact REDARC Tech Support team.