Samlexpower PST-100S-12A Owner's Manual - Troubleshooting Guide
TROUBLESHOOTING GUIDE
SYMPTOM
On switching on, the green
LED does not light. Buzzer is
off. There is no AC voltage.
Low AC output voltage
(No buzzer alarm).
Buzzer alarm is sounded when
load is switched on. Voltage
at DC input terminals reads
between 10 to 10.7 V for PST-
100S-12A or between 20 to
21.4 V for PST-100S-24A.
Green LED is on.
AC output voltage is available
Buzzer alarm is sounded
when load is switched on.
Voltage at the DC input
terminals reads below 10 V
for PST-100S-12A or below 20
V for PST-100S-24A.
Green LED is off.
There is no AC output
There is no AC output.
The green LED is off.
Buzzer is on.
POSSIBLE CAUSE
There is no voltage at the DC
input terminals
Polarity of the input voltage
has been reversed that has
blown the internal DC side
fuses (Note: Reverse polarity
may cause permanent damage)
Low input voltage at the
inverter terminals and the
load is close to the maximum
allowable power
DC input voltage is less than
10.7 V for PST-100S-12A or less
than 21.4 V for PST-100S-24A
Shut-down due to low input DC
voltage (Less than 10V for PST-
100S-12A or less than 20 V for
PST-100S-24A).
Shut-down due to high input
DC voltage
(> 16.5 V for PST-100S-12A or
>33 V for PST-100S-24A).
REMEDY
1. Check the continuity of the
battery input circuit.
2. Check that the battery fuse is
intact. Replace if blown.
3. Check that all connections
in the battery input circuit are
tight
Visibly check the fuse element
if it is blown. The fuses may be
soldered and may not be easily
replaceable. Call Technical
Support for repair.
1. Check that the battery is fully
charged. Recharge, if low.
2. Check that the battery cables
are thick enough to carry the
required current over the
required length. Use thicker
cables, if required.
3. Tighten connections of the
battery input circuit.
4. Reduce the load.
1. Check that the battery is fully
charged. Recharge, if low.
2. Check that the battery cables
are thick enough to carry the
required current over the
required length. Use thicker
cables, if required.
3. Tighten connections of the
battery input circuit
1. Check that the battery is fully
charged. Recharge, if low.
2. Check that the battery cables
are thick enough to carry the
required current over the
required length. Use thicker
cables, if required.
3. Tighten connections of the
battery input circuit.
1. Check that the voltage at the
DC input terminals is less than
16.5V for PST-100S-12A or less
than 33 V for PST-100S-24A.
2. Ensure that the maximum
charging voltage of the battery
charger / alternator / solar
charge controller is below
16.5V for PST-100S-12A or
below 33 V for PST-100S-24A.
3. Ensure that an un-regulated
solar panel is not used to
charge a battery. Under cold
ambient temperatures, the
output of the solar panel may
exceed 18 V for 12 V system or
36 V for 24 V system. Ensure
that a charge controller is used
between the solar panel and
the battery
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