Campbell Scientific Morningstar SunSaver-10 10A 12V Regulator User Manual

Page 14

AUTIONS

1. Troubleshooting should be done by

qualified personnel only.

2. Remember that a battery can cause

serious damage if shorted.

3. There are no user serviceable parts, fuses

or circuit breakers inside the SunSaver.

4. Observe all normal precautions when

working with energized circuitry.

1. B

ATTERY

HARGING

a. Check the green LED indicator. The green CHARGING LED

should be on if it is daytime.

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. Check the polarity (+ and –) of the connections.

d. Measure the PV array open-circuit voltage and confirm it is

within normal limits. If the voltage is low or zero, check the

connections at the PV array itself. Disconnect the PV from

the controller when working on the PV array.

e. Check that the load is not drawing more energy than the PV

array can provide.

f. Check if there are excessive voltage drops between the con-

troller and the battery. This will cause undercharging of the

battery.

g. Check the condition of the battery. Determine if the battery

voltage declines at night with no load. If unable to maintain

its voltage, the battery may be failing.

h. Measure the PV voltage and the battery voltage at the

SunSaver terminals. If the voltage at the terminals is the

same (within a few tenths of volts) the PV array is charging

the battery. If PV voltage is close to the open circuit voltage

of the panels and the battery voltage is low, the controller is

not charging the batteries and may be damaged.

2. B

ATTERY

OLTAGE

IGH

a. First check the operating conditions to confirm that the volt-

age is higher than specifications. Consider the temperature

compensation of the controller’s PWM setpoint. For example,