Troubleshooting Guide - Samlexpower PST-30S-12A Owner's Manual

TROUBLESHOOTING GUIDE

SYMPTOM
On switching on, LED (2) does not light.
Buzzer is off. There is no AC voltage
Low or no AC output voltage on load.
There is hum & noise. Buzzer is off.
LED is green.
Buzzer alarm is sounded when load is
switched on. Voltage at DC input
terminals reads between 10 and 10.5 V.
LED (2) is green.
AC output voltage is available.
Buzzer alarm is sounded when load is
switched on. Voltage at the DC input
terminals reads below 10 V.
LED (2) turns orange.
There is no AC output.
There is no AC output.
LED (2) turns orange.
Buzzer is off.
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 fuse
Clipping of the sine-wave due to overload.
The load draws high starting surge current.
DC input voltage is less than 10.5 V
Shut-down due to low input DC voltage
(Less than 10 V).
Shut-down due to high input DC voltage
(> 16.5 V).
Page 27
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
Correct the polarity of the input
connections and replace the internal
fuse ( Note: Reverse polarity may
cause permanent damage)
If the unit does not work after replacing
the fuse, the unit has been permanently
damaged. Call Technical Support.
1. Reduce the load.
2. If the load has embedded switched
mode power supply (See page 12),
ensure that it is not rated more than
100W.
3. Use inverter with a higher capacity.
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 16.5 V.
2. Ensure that the maximum charging
voltage of the battery charger /
alternator / solar charge controller is
below 16.5 V
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. Ensure that a charge controller is
used between the solar panel and the
battery