Troubleshooting

English


Use the inspections in the table below if the tool does not operate normally. If this does not remedy the problem, consult your
dealer or the Hitachi Authorized Service Center.
Symptom	Possible cause	Remedy
The motor won’t operate	The power plug is not plugged into the power	Plug the power cord into the power socket.
when the trigger is pulled.	socket.
	The switch is set at “OFF”	Switch the washer on.
	The extension cord is unplugged or severed	Replace the extension cord or check it with a
	midway.	di erent electrical appliance.
	The thermal protector has been activated.	Remedy the problem in accordance with the
		details listed in “Safety Mechanisms” on
		page 21.
The motor continues	The water volume or pressure from the faucet	Open the faucet fully.
operating when the	is too low.	Unravel any twists in the water hose and
trigger is released.		high-pressure hose.
		Check to make sure that the inner diameter
		of the water hose is correct.
		Check to make sure that the water hose is
		not wound onto the reel.
	Water is leaking.	Check the hose connections.
Water is not being	The water hose is not connected.	Connect the water hose.
discharged.	The water hose or high-pressure hose is	Unravel the twists.
	twisted.
	The backﬂow valve on the one-touch joint is	Check to make sure that the inner diameter of
	not operating.	the water hose is correct.
	The trigger stopper is locked.	Remedy the problem in accordance with the
		details listed in “Trigger Stopper” on page 20.
	The faucet it turned o .	Open the faucet fully.
	The nozzle is blocked.	Clean the end of the nozzle with the nozzle
		cleaner pin supplied.
	The strainer is blocked.	Wash the strainer, which is incorporated into
		the water feed inlet, in accordance with the
		details listed in “Inspecting the Strainer” on
		page 21.
The water pressure won’t	The power plug is not plugged into the power	Plug the power cord into the power socket.
rise.	socket.
	The switch is set at “OFF”.	Switch the washer on.
	The water volume or pressure from the faucet	Open the faucet fully.
	is too low.	Unravel any twists in the water hose and
		high-pressure hose.
		Check to make sure that the inner diameter
		of the water hose is correct.
		Check to make sure that the water hose is
		not wound onto the reel.
	The nozzle is blocked.	Clean the end of the nozzle with the nozzle
		cleaner pin supplied.
	The electrical voltage is too low.	Check to make sure that the thickness and
		length of the extension cord is appropriate.
	Water is leaking.	Check the hose connections.

AW 150 specifications

The Hitachi Koki USA AW 150 is a versatile air compressor that stands out in the realm of pneumatic tools, offering a blend of efficiency, portability, and power. Designed for both professional and home use, the AW 150 is engineered to meet the demands of various applications including construction, automotive, and woodworking projects.

One of the standout features of the AW 150 is its robust and powerful motor. With a 1.5 horsepower rating, the compressor delivers a maximum pressure of 125 PSI, enabling it to drive pneumatic tools such as nail guns, spray guns, and impact wrenches effectively. The unit's high flow rate ensures quick recovery times, allowing for uninterrupted work periods and increased productivity.

Portability is a key characteristic of the Hitachi Koki AW 150. Weighing in at a manageable level, the compressor is equipped with a sturdy handle, making it easy to transport between job sites. Its compact footprint allows for convenient storage, a crucial factor for professionals who often work in tight spaces or need to move equipment frequently.

The AW 150 also incorporates advanced technologies designed to enhance its performance and reliability. The oil-free pump system eliminates the need for maintenance related to oil changes, ensuring that the compressor remains in top condition with minimal effort. This technology also helps reduce the overall weight of the unit, contributing to its portability.

Another notable aspect of the AW 150 is its noise reduction design. The compressor operates at a sound level that is significantly lower than many of its competitors, making it suitable for use in residential areas or job sites where noise regulations are a concern. The reduced noise level ensures a more comfortable working environment for users.

Safety features are also a priority in the AW 150’s design. The unit includes a thermal overload protector that prevents overheating, ensuring long-term durability and performance. Additionally, the integrated quick-connect couplers facilitate a seamless connection to air tools, enhancing usability and efficiency.

In summary, the Hitachi Koki USA AW 150 air compressor combines power, portability, and innovative technology. With its high performance, ease of use, and low maintenance requirements, it is an ideal choice for both DIY enthusiasts and professionals seeking reliability and efficiency in their pneumatic tool applications.