PROBLEM

POSSIBLE CAUSE

REASON/SOLUTION

The charger is

Circuit breaker is cycling.

The settings may be wrong. Check the

making an audible

 

charger settings.

clicking sound.

Battery is defective.

Have the battery checked.

 

 

Shorted battery cables or clips.

Circuit breaker cycles when current draw

 

 

is too high. Check for shorted cables or

 

 

clips and replace if necessary.

 

Severely discharged battery,

The battery may not want to accept a

 

but otherwise it is a good

charge due to a run-down state. Allow

 

battery.

charging to continue until battery has a

 

 

chance to recover sufficiently to take a

 

 

charge. If more than 20 minutes, stop

 

 

charging and have the battery checked.

 

Reverse connections at battery.

Shut the charger off and correct the lead

 

 

connections.

Charger makes a

Transformer laminations vibrate

No problem; this is a normal condition.

loud buzz or hum.

(buzz).

 

 

Shorted Diode Assembly or

Have charger checked by a qualified

 

Output Rectifier Assembly

technician.

 

(hum).

 

Short or no start

Drawing more than 350 amps.

Crank time varies with the amount of

cycle when cranking

 

current drawn. If cranking draws more

engine.

 

than 350 amps, crank time may be less

 

 

than 3 seconds.

 

Failure to wait 3 minutes (180

Wait 3 minutes of rest time before the

 

seconds) between cranks.

next crank.

 

Clips are not making a good

Check for poor connection at battery

 

connection.

and frame.

 

AC cord and/or extension cord

Check power cord and extension cord for

 

is loose.

loose fitting plug.

 

No power at receptacle.

Check for open fuse or circuit breaker

 

 

supplying AC outlet.

 

The charger may be

The thermal protector may have tripped

 

overheated.

and needs a little longer to reset. Make

 

 

sure the charger vents are not blocked.

 

 

Wait and try again.

 

Battery may be severely

On a severely discharged battery, charge

 

discharged.

for 10 to 15 minutes in the 40 amp

 

 

manual rate to help assist in cranking.

Charger will not turn

AC outlet is dead.

Check for open fuse or circuit breaker

on when properly

 

supplying AC outlet.

connected.

Blown Fuse.

Replace the fuse (15 Amp fuse).

 

 

Poor electrical connection.

Check power cord and extension cord for

 

 

loose fitting plug.

The battery is

Clips are not making a good

Check for poor connection at battery and

connected and the

connection.

frame. Make sure connecting points are

charger is on, but is

 

clean. Rock clips back and forth for a

not charging.

 

better connection.

The measured

The charger reached the

No problem; this is a normal condition.

current is much

maximum voltage and is

 

lower than what was

reducing the current.

 

selected.

 

 

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Schumacher PWI70300A owner manual Problem Possible Cause REASON/SOLUTION
Page 10 Page 12

PWI70300A specifications

The Schumacher PWI70300A is a versatile and powerful 7 Amp fully automatic battery maintainer and charger that has been designed to cater to the needs of both everyday drivers and automotive enthusiasts. This model stands out for its blend of advanced technology and user-friendly features, making it suitable for various battery types, including 6V and 12V lead-acid batteries.

One of the main features of the PWI70300A is its automatic multi-stage charging system. This technology helps in optimizing battery performance and lifespan by delivering the appropriate charge based on the battery's condition. It automatically switches from bulk charge to absorption and then to maintenance mode once the battery reaches full charge, ensuring that there is no overcharging, which can cause damage.

The lightweight and compact design of the PWI70300A enhances its portability, allowing users to easily carry it around or store it in tight spaces. Additionally, the unit comes equipped with a user-friendly LED indicator, which provides real-time feedback about the charging status. This feature simplifies the charging process, as users can easily gauge whether the battery is charging, fully charged, or requires attention.

Notably, the PWI70300A is designed with safety as a priority. It includes built-in protections against reverse polarity, short circuit, and over-temperature, which significantly reduces the risks associated with battery charging. This makes it an ideal choice for those who may not have extensive experience with battery maintenance.

The Schumacher PWI70300A also shines in its versatility, as it is compatible with a wide range of electrical vehicles, including cars, motorcycles, and ATVs. This makes it a valuable addition to the toolkit of any vehicle owner. The inclusion of clamps and ring terminals ensures flexible connectivity options, allowing users to choose the most convenient way to connect the charger.

In summary, the Schumacher PWI70300A is a robust and dependable battery maintainer and charger, ideal for anyone looking to extend the life of their batteries while still being easy to use. With its automatic charging capabilities, safety features, portability, and compatibility with various vehicles, it presents an excellent investment for maintaining battery health and performance. Whether for professional use or personal convenience, the Schumacher PWI70300A delivers on quality and reliability.
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