SYMPTOM
AC output voltage shuts
down when vehicles engine
is cranked
POSSIBLE CAUSE
Shut-down due to over
temperature because of fan
failure or inadequate cooling
as a result of high ambient
temperature or insufficient
air exchange
Shut down due to overload
or short circuit on the output
side.
The inverter has been
powered from the starting
battery. When the engine is
cranked, the battery voltage
drops below 10V for PST-30S-
12A or below 20V for PST-
30S-24A
REMEDY
1. Check that the fan is
working. If not, the fan / fan
control circuit may be defective.
Call Technical Support.
2. If the fan is working, check
that the ventilation slots on the
suction side and the openings
on the discharge side of the fan
are not obstructed.
3. If the fan is working and the
openings are not obstructed,
check that enough cool
replacement air is available.
Also check that the ambient air
temperature is less than 40º C.
4. Reduce the load to reduce
the heating effect.
5. After the cause of over
heating is removed and the
unit cools down, it will reset
automatically.
1. Disconnect the load.
2. Manually reset the unit by
switching off and then on
again. The unit should power
on normally. (If not, the unit
may have been damaged
permanently). Call Tech
Support.
3. Reduce the load or remove
the short circuit before
powering on again.
Use a separate deep cycle
battery for powering the
inverter. (see page 18)
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