If The Inverter Fuse Blows; Troubleshooting - Schumacher Electric PI-750 Owner's Manual

9. IF THE INVERTER FUSE BLOWS

Your power inverter is fitted with a fuse, which should not have to be replaced under
normal operating conditions. A blown fuse is usually caused by reverse polarity or a
short circuit within the device or equipment being operated.
If the fuse does blow:
1. Disconnect the device or equipment immediately.
2. Find the source of the problem and repair it.
3. Install a new fuse (40A). The fuse can be found on the right side of the inverter.
NOTE: If you are using the 12V accessory plug to power the inverter, there is
also a 15A fuse in the end of the plug.
IMPORTANT: Do not install a fuse with a higher amp rating than the original fuse,
as this may damage the inverter and any product you use with the inverter. Make
sure to correct the cause of the blown fuse before using the inverter again.

10. TROUBLESHOOTING

PROBLEM
Red LED is on,
alarm sounds,
and/or inverter
does not function.
Device does
not operate
properly when first
connected to the
inverter.
POSSIBLE CAUSE
Poor contact at terminals.
Connections are reversed.
Fuse is blown.
Inverter shutdown.
The inverter may not have
the required capacity to
operate the device.
REASON/SOLUTION
Check for poor connection to
battery or power supply. Make
sure connection points are clean.
Rock clamps back and forth for a
better connection.
Unplug the inverterer and
reverse the clamps.
See If the Inverter Fuse Blows
section.
See LED Indicator and Shutdown
Protection section.
Turn the inverter switch OFF and
ON, to reset the inverter. If device
still does not operate, the
inverter should not be used with
this device. Use a higher capacity
inverter or lower rated device.
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