PROBLEM

POSSIBLE CAUSE

REASON/SOLUTION

Charger makes a loud buzz

Transformer laminations vibrate

No problem; this is a normal

or hum.

(buzz).

condition.

 

Shorted Diode Assembly or

Have charger checked by a

 

Output Rectifier Assembly (hum).

qualified technician.

Short or no start cycle

Drawing more than the charger’s

Crank time varies with the

when cranking engine.

rated amps.

amount of current drawn. If

 

 

cranking draws more than the

 

 

charger’s rated amps, crank time

 

 

may be less than 3 seconds.

 

Failure to wait 3 minutes (180

Wait 3 minutes of rest time before

 

seconds) between cranks.

the next crank.

 

Clips are not making a good

Check for poor connection at

 

connection.

battery and frame.

 

AC cord and/or extension cord

Check power cord and extension

 

is loose.

cord for loose fitting plug.

 

No power at receptacle.

Check for open fuse or circuit

 

 

breaker supplying AC outlet.

 

The charger may be overheated.

The thermal protector may have

 

 

tripped 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,

 

discharged.

charge for 10 to 15 minutes in the

 

 

manual charge rate to help assist

 

 

in cranking.

Charger will not turn on

AC outlet is dead.

Check for open fuse or circuit

when properly connected.

 

breaker supplying AC outlet.

 

Poor electrical connection.

Check power cord and extension

 

 

cord for loose fitting plug.

The battery is connected

Clips are not making a good

Check for poor connection at

and the charger is on, but

connection.

battery and frame. Make sure

is not charging.

 

connecting points are clean.

 

 

Rock clips back and forth for a

 

 

better connection.

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Schumacher PSW-22 owner manual Problem Possible Cause REASON/SOLUTION