Fuse
THERE ARE SEVERAL WAYS THE FUSE CAN BLOW, INCLUDING:
• The wires are attached in reverse. This means that the fuse wire is
attached to the black terminal on the battery.
• An overheated or seized pump.
• Damaged or cut wires touching the positive to the negative.
• A faulty circuit board.
Pump
Problems with the pump may be caused by:
• The pressure switch screw on the pump is not turned all the way in.
• Clogging from poorly shaken, expired or frozen paint.
• Overheating or seizing.
circuit board
Caution: Prior to testing or replacing the circuit board, it’s important
to first rule out any other potential problems or issues.
To check for a burned-out or defective circuit board, perform a visual
check, looking for burnt or damaged wires. If this does not produce an
answer, you will need a voltmeter to properly test the circuit board.
• With a fully charged battery, connect the voltmeter to the harnesses
between the circuit board and pump. Place the red probe on the red
wire and black probe to the black wire.
• When the battery is disconnected, the reading should be 0.0v.
• When the battery is connected and the toggle switch is in the “Off”
position, the reading should be between 5.3v and 5.9v. If the reading
is 0.0v, the circuit board or the wiring between the battery and circuit
board may be defective.
• If the toggle switch is in the “On” position, the reading should be
between 12v and 13v.
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