My SmartSolar MPPT 150/85 is showing Fault #40. Usual power cycling troubleshooting (disconnecting both batteries and PV) hasn't resolved it - fault returns immediately on restarting.
The manual and website both say -
Err 40 - PV Input failed to shutdown If the charger is unable to turn off the PV input, it will go into a safe mode in order to protect the battery from over-charging or having a high voltage on the battery terminals. In order to do that, the charger will stop charging and disconnect its own output. The charger will become faulty
I can't find any troubleshooting steps in the manuals or elsewhere online. We're away in the boat, so can't easily get a sparky in to check it out.
Has anyone met this before? Any suggestions for steps to reset beyond power cycling? What does it mean by "failed to shutdown PV input" - I can't think of an obvious change in the rest of the system that could be causing the fault.
Thanks heaps
