TROUBLESHOOTING GUIDE
SYMPTOM
On switching on, the input voltage bar
graph indicator does not light. There is
no AC voltage
AC output voltage reads low ( 96 to 104
VAC) when measured with an ordinary
voltmeter
Low AC output voltage and the battery
current bar graph indicator shows very
high current (No buzzer alarm)
Buzzer alarm is sounded when load is
switched on. DC input voltage bar graph
indicator reads between 20 and 21 V.
AC output voltage is available
Buzzer alarm is sounded when load is
switched on. DC input voltage bar graph
indicator reads below 20 V. There is no
AC output
There is no AC output. The voltage bar
graph indicator shows normal DC input
voltage
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
The voltmeter being used is not designed to
read the RMS value of modified sine wave-
form
Low input voltage at the inverter terminals
and the load is close to the maximum
allowable power
DC input voltage is less than 21 V
Shut-down due to low input DC voltage
(Less than 20 V).
Note
: The unit will be latched in this shut-
down condition. To reset, switch the power
on / off switch to off and then on again.
Before switching on again, remove the
cause of the shut-down
Shut-down due to high input DC voltage
(> 33 V).
Note:
The unit will be latched in this shut-
down condition. To reset, switch the power
on / off switch to off and then on again.
Before switching on again, remove the
cause of the shut-down
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
fuses (
Note: Reverse polarity may
cause permanent damage)
If the unit does not work after replacing
the fuses, the unit has been permanently
damaged. Call Technical Support.
Use a true RMS reading voltmeter like
Fluke 87
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 33 V.
2. Ensure that the maximum charging
voltage of the battery charger /
alternator / solar charge controller is
below 33 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
36 V. Ensure that a charge controller is
used between the solar panel and the
battery
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