Troubleshooting Guide | Panasonic EY3544-U1 specification

EY3544-U1

4 TROUBLESHOOTING GUIDE

< TROUBLE >

Does not operate.

→

<CHECK >

<CHECK BATTERY PACK.>

If no less than 18V DC is available across the (+) and (-) terminals after charging for the rated charging time

(approx. 65 minutes for EY9250), the battery pack is OK.

NOTE: The battery pack is sold separately as an optional accessory. See the nearest sales dealer for details. The battery pack has a limited life.

The pack should be replaced if;

-after being charged for the rated charging time the battery voltage is less than 18V DC or the usable time is extremely short.

-the battery leaks. Check battery for leaks and terminals for corrosion

↓OK

<CHECK TERMINAL CONNECTIONS BETWEEN MAIN UNIT

AND BATTERY PACK.>

Check for proper terminal contacts.

↓OK

<CHECK SWITCH BLOCK.>

(See WIRING CONNECTION DIAGRAM.)

Check continuity between following terminals.

1)Inspection of the switch operated contact. When switch handle is depressed all the way:

-There should be 0Ω between (A) - (D) , and between (B) - (C) ; when switch lever is set to forward side.

2)Inspection of the brake.

When switch handle is not depressed:

-There should be 0Ω between (A) - (B)

↓OK

<CHECK CARBON BRUSH.>

1)The condition of carbon brush.

-There should be more than 1mm from the line of the carbon brush.

2)The continuity of carbon brush.

-There should be 0Ωbetween the motor lead wire and the metal fitting of carbon brush.

↓OK

Check the condition of rotor if there is any wear, crack and deformation.

↓OK

<REMEDY >

NO Replace battery pack.

→

NO Repair contacts.

→

NO Contacts in switch block

→are defective. Replace switch & FET block.

NO Replace carbon

→brushes.

NO Replace motor

→rotor assembly.

Does not speed-
control.	→

Check the condition of motor case if there is any crack and deformation.

<CHECK SWITCH.>

Follow the procedure above “CHECK SWITCH”.

Attach the battery pack and confirm the switch operation when depressing the switch handle little by little.

NO Replace motor

→stator.

NO Repair the contact

→or replace switch & FET block.

EY3544-U1 specifications

The Panasonic EY3544-U1 is a powerful and versatile cordless impact wrench designed for professionals seeking a reliable tool for heavy-duty applications. With a focus on enhancing both performance and user experience, this model stands out in the crowded market of power tools.

One of the most notable features of the EY3544-U1 is its high torque output. Equipped with a brushless motor, it delivers impressive torque levels, making it capable of handling even the toughest fastening jobs. This technology not only increases efficiency but also extends the lifespan of the tool, reducing the need for frequent replacements or maintenance.

The 18V battery platform is another significant aspect of the EY3544-U1. The lithium-ion battery provides a strong and consistent power supply, allowing users to work longer without interruptions. The quick-charge feature reduces downtime, ensuring that the tool can be ready for use in a short period. As a result, professionals can seamlessly transition between projects, enhancing productivity.

Weighing in at just under 5 pounds, the EY3544-U1 is designed with user comfort in mind. Its lightweight construction makes it easy to handle, reducing user fatigue during prolonged use. The ergonomic grip ensures a comfortable hold, which is crucial when working with tools for extended periods.

In terms of usability, the EY3544-U1 features a variable speed control that allows users to adjust the speed according to their specific needs. This adaptability makes it suitable for a wide range of applications, from automotive repairs to construction tasks. Additionally, the built-in LED light illuminates the work area, enhancing visibility and precision, especially in poorly lit environments.

Safety is also a priority with this model. It comes with a torque limiter that prevents over-tightening, thereby protecting both the tool and the fasteners. The compact design allows for access to tight spaces, making it an excellent choice for working on confined areas.

In summary, the Panasonic EY3544-U1 cordless impact wrench is a robust tool tailored for professionals. Its combination of advanced motor technology, efficient battery performance, and user-friendly design makes it an appealing choice for those who need a reliable and powerful impact wrench. Whether on a construction site or in a home garage, the EY3544-U1 is engineered to meet the demands of various fastening tasks with precision and ease.