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P/N: 307271
SECTION 5 TROUBLESHOOTING
5.1 TROUBLESHOOTING
If the unit will not crank when a “START” is attempted, DO NOT jump-start without first considering the
following:
• If there is obvious battery damage such as a cracked or broken case, replace battery
• Check for loose battery cables. Tighten if necessary
• Check terminals for corrosion, clean if necessary
1. Connect the first jumper cable from positive “+” (red) terminal of the discharged battery to the
positive “+” (red) terminal on the booster battery. NEVER connect “+” (red) to “-” (black). DO
NOT PERMIT vehicles to touch each other as this could establish a ground connection and
counteract the benefits of this procedure.
2. Connect one end of second jumper cable to the ground negative “-” (black) terminal of the booster
battery. Connect the other end of this jumper cable to a solid, stationary metallic point on the
compressor with the discharged battery but at a point AWAY from the battery (at least 18 inches or
more) if possible. DO NOT connect directly to the negative post of the discharged battery.
3. Disconnect positive battery terminal whenever using a high rate charge. Start the compressor in
accordance with normal procedure. When the engine is operating smoothly disconnect the jumper
cable end at the engine block before disconnecting the jumper cables from the other position.
Your Boss compressor has safety switches that protect the engine and compressor from permanent damage.
The safety switches are as follows:
1. Engine Oil Pressure: This is a normally open switch that closes with 15 PSI of engine oil pressure.
2. Engine Coolant Temperature: This is a normally closed that opens a 220° F.
3. Compressor Oil Temperature: This is a normally closed switch that opens at 245°F.
All above switches are in series with the power feed to the engine fuel solenoid. If any of the switches open,
power to the solenoid is lost and the engine shuts down.
WARNING
OPERATING WITHOUT SAFETY SWITCHES COULD CAUSE SEVERE PERSONAL
INJURY OR DEATH AND CAUSE SIGNIFICANT PROPERTY DAMAGE. IT WILL
VOID EXISTING WARRANTIES. ALWAYS ENSURE THAT ALL SAFETY SYSTEMS
ARE FUNCTIONAL.