| Schumacher SS-51A-PE Troubleshooting Guide |
| PROBLEM | POSSIBLE CAUSE | SOLUTION |
| No meter reading. | Charger is not plugged in. | Plug in. |
| Connections are reversed. | With charger unplugged, reverse clamps and reconnect (rock back and forth to bite in). |
| Poor electrical connection. | Clean clamps and battery poles and reconnect (rock back and forth to bite in). |
| AC outlet is dead. | Plug in a lamp or other appliance to check for voltage. |
| Battery is defective (will not accept charge). | Have battery checked. |
| Charger will not turn on when properly connected to power. | Battery recently used in vehicle and is fully charged. | Battery does not need charging. |
| (If battery is in vehicle, turning on headlights will lower battery voltage in a few seconds and charger should then turn on.) |
| Battery has less than 0.7 volts, set to Manual and retry. |
| Charger will not turn OFF. | Battery has a problem and will not take a full charge. | Have battery checked. (If in MANUAL, swithch to AUTOMATIC). |
| Meter needle pulses (fluctuates) every few seconds AFTER THREE HOURS without slowing down. | Two or more batteries connected in parallel. | Requires more time to charge: continue charging. |
| Battery of 200 ampere hours or larger. | Requires more time to charge: continue charging. |
| Battery is connected to application that draws a small current (such as a vehicle's dome light). | Requires more time to charge: continue charging. |
| Charging current is less than full output rating of charger. | Battery is partially charged. | Continue charging. |
| Battery is defective (battery plates are crusted) and will not accept a full charge. | Have checked and replace battery. |
| AC power supply is low. | Plug charger into another grounded AC outlet. |
| Meter needle moves to extreme right, remains a short time, then returns to zero, accompanied by a clicking sound. | Severely discharged battery (but otherwise good battery). | Allow charging to continue until battery has recovered sufficiently to take a charge (Circuit breaker will continue to cycle and needle will swing side to side until battery has recovered). |
| In MANUAL with battery connections reversed. | Unplug charger and change to correct connections. |
| Battery is defective (will not accept charge). | Have battery checked. |
| Charger is cycling after circuit breaker overload. | Wait until charger automatically resets itself (DO NOT RETURN FOR SERVICE). |
Schumacher User Manual Link
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