installation guide

4.0 OPERATION
MORNINGSTAR CORPORATION 31
4.0
High Voltage Input
(Charging Status LED: R fl ashing) If the solar input open
circuit voltage (V
oc
) exceeds the 75 volt maximum rating the
array will remain disconnected until the V
oc
falls safely below
the maximum rating.
Battery Reverse Polarity
(No LED indication, not powered) Fully protected against
reverse battery connection. No damage to the controller will
result. Correct the miswire to resume normal operation.
Damaged Local Temperature Sensor
(Charging Status LED: R on solid) The local ambient
temperature sensor is short-circuited or damaged. Charging
stops to avoid over- or under-charging. This is a critical
error. Contact your authorized Morningstar dealer for
service.
Damaged Internal Temperature Sensor
(Charging Status LED: R on solid) The internal heatsink
temperature sensor is damaged. This is a critical error.
Contact your authorized Morningstar dealer for service.
High Temperature
(Battery Status LED: R-Y sequencing) The heatsink
temperature has exceeded safe limits and the load is
disconnected. The load will automatically reconnect when
the heatsink cools to a safe temperature.
Remote Temperature Sensor (RTS)
(Battery Status LED: R/Y - G/Y sequencing) A bad RTS
connection or a severed RTS wire has disconnected the
temperature sensor during charging. Charging automatically
resumes when the problem is fi xed. To resume operation
without a RTS, disconnect all power to the SunSaver MPPT
and then reconnect.
High Voltage Transients
Solar, battery, and load power connections are protected
against high voltage transients. In lightning prone areas,
additional external suppression is recommended.
4.6 Inspection and Maintenance
The following inspections and maintenance tasks are
recommended at least two times per year for best controller
performance.
Tighten all terminals. Inspect for loose, broken, or •
corroded connections.
Verify that all wire clamps and tie-downs are secure.•
Check that the controller is mounted in a clean, •
protected environment; free of dirt, insects, nests,
and corrosion.
If applicable, check enclosure ventilation and air fl ow •
holes for obstructions.
Verify LED indication is consistent with the present •
system conditions.
Verify that the Remote Temperature Sensor (if •
used) is securely attached to the RTS terminals.