Harbor Freight Tools 67847 operating instructions Problem Possible Causes Likely Solutions

Troubleshooting

Problem		Possible Causes		Likely Solutions
Compressor does	1.	Incorrect power supply.	1.	Check that circuit matches compressor requirements.
not start or restart	2.	No power at outlet.	2.	Reset circuit breaker, or have outlet serviced by a
				qualified technician.
	3.	Power cord not plugged in	3.	Check that cord is plugged in securely.
		properly.
	4.	Thermal overload switch	4.	Turn off tool. Turn off Compressor and wait for it to cool
		tripped or Compressor circuit		down. Press Reset Button. Resume operation.
		breaker tripped.
	5.	Building power supply circuit	5.	Reset circuit or replace fuse. Check for low voltage
		tripped or blown fuse.		conditions. It may be necessary to disconnect other
				electrical appliances from the circuit or move the
				compressor to its own circuit.
	6.	Tank already pressurized.	6.	Fully bleed tank of air.
	7.	Cord wire size is too small or	7.	Use larger diameter or shorter extension cord or
		cord is too long to properly		eliminate extension cord. See Recommended Wire
		power compressor.		Gauge for Extension Cords in Safety section.
	8.	Compressor needs service.	8.	Have unit inspected by a qualified technician.
Compressor shuts	1.	Cold weather	1.	Turn off tool. Press the Reset Button. Start
off automatically				Compressor in a heated area if temperatures drop
before reaching full				below 32ºF, or use SAE 10W non-detergent air
pressure (Circuit				compressor oil instead of 30W.
breaker trips)	2.	Extension cord usage.	2.	Turn off tool. Press the Reset Button. Use without
				extension cord.
Compressor	1.	Cold weather.	1.	Press the Reset Button, then, start Compressor in a
hums, then shuts				heated area if temperatures drop below 32ºF, or use
off automatically				SAE 10W non-detergent air compressor oil instead of
before reaching full				30W.
pressure (Circuit	2.	Extension cord usage.	2.	Press the Reset Button. Use without extension cord.
breaker trips)
	3.	Engine too hot.	3.	Wait for engine to cool and unit will start automatically.
Compressor builds	1.	Incorrect power supply.	1.	Check that circuit matches compressor requirements.
pressure too slowly	2.	Crankcase overfilled with oil or	2.	Drain oil and refill to proper level with recommended
		oil too thick.		oil.
	3.	Working environment too cold.	3.	Move unit to a warmer location. Check that
				recommended oil is in crankcase.
	4.	Safety valve needs service.	4.	Listen for air leaking from valve. If leaking replace with
	5.	Loose fittings.		identical valve with same rating.
			5.	Reduce air pressure, then check all fittings with a soap
				solution for air leaks and tighten as needed. Do not
				overtighten.
Compressor not	1.	Filters need cleaning/replacing.	1.	Check inlet and outlet filters. Clean and/or replace as
building enough air				needed.
pressure	2.	Crankcase oil too thick.	2.	Drain oil and refill to proper level with recommended
				oil.
	3.	Check Valve needs service.	3.	Clean or replace, as needed.
	4.	Compressor not large enough	4.	Check if accessory SCFM is met by Compressor. If
		for job.		Compressor cannot supply enough air flow (SCFM),
				you need a larger Compressor.
	5.	Loose fittings.	5.	Reduce air pressure, then check all fittings with a soap
				solution for air leaks and tighten as needed. Do not
				overtighten.
	6.	Hose or hose connections not	6.	Replace with larger hose and/or hose connections.
		adequate.
	7.	High altitude reducing air	7.	You may need a larger compressor if you are situated
		output.		in a high altitude location.
Page 16	For technical questions, please call 1-800-444-3353.				SKU 67847