Campbell Scientific Morningstar SunSaver-10 10A 12V Regulator - Manual (Page 15)

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at 0°C the controller will regulate at about 15.1 volts (for
12 volt flooded batteries).
b. Check that the proper battery type (sealed or flooded) has
been selected.
c. Check that all wire connections in the system are correct and
tight.
d. Disconnect the PV array and momentarily disconnect the
lead from the BATTERY positive terminal. Reconnect the
battery terminal and leave the PV array disconnected. The
Green charging light should not be lit. Measure the voltage
at the SOLAR terminals (with the array still disconnected). If
the green charging light is on or battery voltage is measured
at the SOLAR terminals, the controller may be damaged.
3. L
OAD
N
OT
O
PERATING
P
ROPERLY
a. Check that the load is turned on. Check that no system fuses
are defective. Check that no system circuit breakers are
tripped. Remember that there are no fuses or circuit breakers
inside the SunSaver.
b. Check connections to the load, and other controller and bat-
tery connections. Make sure voltage drops in the system
wires are not too high.
c. Check for proper LED indications on the SunSaver. If the red
LOAD DISCONNECT LED is on, the load has been discon-
nected due to low battery voltage. This is generally a normal
state when the load exceeds the PV array output due to
weather and other sunlight conditions.
d. Measure the voltage at the controller BATTERY terminals. If
this voltage is above the LVD, the load should have power.
Then measure the voltage at the controller LOAD terminals,
and if there is no voltage present, the controller may be
defective.
N OTE : For more detailed testing instructions contact
the Morningstar web site.