PSW-70300A Schumacher Battery Charger Parts List

PSW-70300A 4/20/40/70/300A 12V Microprocessor Controlled Pro Series Wheel Charger

Schumacher PSW-70300A Repair Parts
Part No.	Description	Qty
0099000094	135 Minute Timer Mechanical withHold	1
0099000269	Knob for Timer Switches on PSSeries Chargers	1
0099000270	Knob for Selector Switches on PSSeries Chargers	1
0099000471	Wheel 7" Plastic for 3/8" Axle	1
0099000472	Battery Charger Axle 15-5/8" x3/8" Diameter with Cotter Pin Holes	1
0099000474	Wheel Hub Cap for Wheel	1
0499000058	6 Position Rotary Selector Switch	1
1199005112	Metal Foot	1
2199700006	Axle End Cap 0.375" DiameterAxle (Pair)	1
2299001565	Fan Motor 12 Volt DC MuffinUltra Quiet	1
2299001754	Control Board Assembly PSW-70300A	1
2299002058	12 Volt Fan Motor Assembly	1
3899001929	Positive Output Cable and Clamp(Red)	1
3899001930	Negative Output Cable and Clamp(Black)	1
3999000111	Circuit Breaker DC 120 Amp 32Volt	1
4999001229	Fan MOtor 12 Volt DC MuffinUltra Quiet	1
5399100153	Ammeter Horizontal 0-70 Amp withStart	1
5399200019	Volt Meter 5-16 Volt	1

Schumacher PSW-70300A Troubleshooting Guide
PROBLEM	POSSIBLE CAUSE	SOLUTION
Charger will not turn on when properly connected.	AC outlet is dead.	Check for open fuse or circuit breaker supplying AC outlet.
Charger will not turn on when properly connected.	Poor electrical connection.	Check power cord and extension cord for loose fitting plug.
No reading on the ammeter.	Charger is not plugged in.	Plug the charger into an AC outlet.
	No power at the receptacle.	Check for open fuse or circuit breaker supplying AC outlet.
	Clamps are not making a good connection to the battery.	Check for poor connection to battery and frame. Make sure connection points are clean.
	Connections are reversed.	Unplug the charger and reverse the clamps.
	Battery is defective.	Have battery checked.
Ammeter reading stays high.	Battery is severely discharged.	Continue charging battery. If problem continues have the battery checked.
Ammeter reads less than selected charge rate when charging a discharged battery.	Extension cord is too long or wire gauge is too small.	Use a shorter or heavier gauge extension cord.
	Weak cell or sulfated plate in the battery.	A sulfated battery will eventually take a normal charge if left connected. If the battery will not take a charge, have it checked.
	Battery is only partially discharged.	Continue to charge the battery.
Battery clamps do not spark when touched together.	The clamps will not spark if touched together on automatic mode.	This is not a problem.
The yellow LED is blinking.	The battery is sulfated.	The charger is running the Desulfation mode.
Both LEDs are off.	The charger is in Abort mode.	Unplug the charger and plug it back in again.
The charger is making an audible clicking sound.	Circuit breaker is cycling.	The settings may be wrong. Check the charger settings.
	Battery is defective.	Have the battery checked.
	Shorted battery cables or clamps.	Check for shorted cables or clamps and replace if necessary.
	Severely discharged battery, but otherwise it is a good battery.	Allow charging to continue until the battery starts taking a charge. If more than 20 minutes, stop charging and have the battery checked.
	Reverse connections at battery.	Turn the charger off and correct the lead connections.
Charger makes buzz or hum.	Transformer laminations vibrate.	No problem; this is a normal condition.
Engine start does not work.	Drawing more than 300 amps.	Crank time varies with the amount of current drawn. If cranking draws more than 300 amps, crank time may be less than 3 seconds.
	Failure to wait 3 minutes (180 seconds) between cranks.	Wait 3 minutes of rest time before the next crank.
	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 discharged.	On a severely discharged battery, charge for 10 to 15 minutes in the 40 Amp manual rate to help assist in cranking.
Schumacher User Manual Link

When a charging problem arises, make certain that the battery is capable of accepting a normal charge. Double check all connections, AC outlet for a full 120-volts, charger clips for correct polarity and the quality of the connections from the cables to the clips and from the clips to the battery system. The clips must be clean.

When a battery is very cold, partially charged or sulfated, it will not draw the full rated amperes from the charger. It is both dangerous and damaging to a battery to force higher amperage into it than it can effectively use in recharging.