TriStar MPPT 600V Installation & Operation Manual
62TriStar MPPT 600V Operator’s Manual
Battery Charging and Performance Issues
Problem:
No LED indications, controller does not appear to be powered
Solution:
With a multi-meter, check the voltage at the battery terminals on the TriStar MPPT 600V. Bat-
tery voltage must be 16* vdc or greater. If the voltage on the battery terminals of the controller
is between 16 and 72 vdc, and no LEDs are lit, contact your authorized Morningstar dealer for
service. If no voltage is measured, check wiring connections, fuses, and breakers.
* Unit will power on with 10V, but 16V is required for charging to occur.
Problem:
The TriStar MPPT 600V is not charging the battery.
Solution:
Checkthethree(3)batterySOCLEDs.Iftheyareashingasequence,seeSection 4.4 Faults &
Alarms of this manual to determine the cause. If a TriStar Meter 2-600V is connected, the diag-
nostics menu will display reported faults and alarms.
If the LED indications are normal, check the fuses, breakers, and wiring connections in the solar
array wiring. With a multi-meter, check the array voltage directly at the TriStar MPPT 600V solar
input terminals. Input voltage must be greater than battery voltage before charging will begin.
Problem:
Controller makes buzzing and humming noises.
Solution:
No action is required. This is expected due to magnetic resonance and circuit switching.
NOTE: For more in-depth testing and diagnosis, please refer to the TriStar MPPT 600V
Testing Guide on the Tech Support page at: www.morningstarcorp.com/en/support
Trouble-Shooting6.0