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3. INVERTER SHUTS DOWN DURING MIDDLE OF THE DAY, AND COMES BACK ON
LATE IN THE AFTERNOON.
This is more than likely caused by high battery volts during peak charging times from solar panels. To
overcome this, adjust the high voltage cutout of your SA41 (see High DC Volts Cutout on page 11); the
maximum voltage allowable being 34 Volts. If this is still not high enough you may have a problem
with either your batteries or your regulator. This could be potentially dangerous so we advise you to
consult your system designer immediately.
4. INVERTER SHUTS DOWN WITH LOW VOLTS.
If your SA41 has shut down because of low DC volts it could be due to the following:
(1) A sustained large load could be causing the battery volts to drop to a low enough point to cause
the SA41 to cut out. This is not normally a fault with the SA41 but could be due to the following:
(a) Battery bank is too small - consult your system designer.
(b) A bad connection between the batteries and inverter due to a loose or corroded terminal.
In this case, please refer to the maintenance section of this manual.
(c) One or more battery cells could be faulty - consult your installer.
(2) If your battery volts are below 47V with no loads connected, the batteries may require charging.
Use a hydrometer to check the specific gravity of each cell. Consult your battery manual for the
correct specific gravity (SG) readings.
5. INVERTER SHUTS DOWN DUE TO HEATSINK TOO HOT
This is likely under heavy sustained load conditions since the SA41 shuts down to protect its internal
components. If you believe that the load is not excessive, check around the inverter case and heatsinks
for obstructions to air flow as this will cause the inverter to heat up much quicker and shut down sooner
than normal. Also check that the clearances around the SA41 are as specified in INSTALLATION on
page 2.
6. “CHARGE IN BATTERY” APPEARS INCORRECT
It is possible that this figure can accumulate errors, as battery charging / discharging is a very complex
procedure with many variances; a hydrometer is always the most accurate method of determining a
battery’s state of charge. If your system regulator is showing FLOAT then you should be able to
presume your batteries are close to, or actually, 100% charged. You can confirm this with a
hydrometer. If the “CHARGE IN BATTERY” figure is not reading correctly, adjust it by the method
shown in page 13. If the figure is consistently too low, (e.g. 90% when the system shows FLOAT) you
should increase the battery charge efficiency figure as described in page 13. Alternatively, if your
system is not in float and the reading is already 100%, you should reduce the battery efficiency.
7. INVERTER PULSES SLOWER THAN NORMAL WHEN IN STAND-BY
This means that the inverter has not been switched on for approximately 20 minutes and has gone into a
power saving mode, thus pulsing at about half the normal rate.
8. “NETT AMP HOUR” APPEARS INCORRECT
This could be caused by one or both of the following:
(a) The clock is not adjusted correctly, see page 8.
(b) The “DC Amps” reading is not correct. Adjust this by zeroing the meter, see pages 13 and 28.