| PROBLEM | POSSIBLE CAUSE | SOLUTION |
| The charger is makingan audible clicking sound. | Circuitbreaker is cycling. | Thesettings may be wrong. Check the charger settings. |
| Batteryis defective. | Have battery checked. |
| Shortedbattery cables or clips. | Circuitbreaker is cycling. Check for shorted cables or clips and replace ifnecessary. |
| Severelydischarged battery, but otherwise it is a good battery. | Allowcharging to continue until battery has a chance to recover sufficientlyto take a charge. If more than 20 minutes, stop charging and have thebattery checked. |
| Reverseconnections at battery. | Shutthe charger off and correct the lead connections. |
| Charger makes a loudbuzz or hum. | Transformerlaminations vibrate (buzz). | Noproblem; this is a normal condition. |
| ShortedDiode Assembly or Output Rectifier Assembly (hum). | Havecharger checked by a qualified technician. |
| Short or no startcycle when cranking engine. | Drawingmore amps than the charger can provide. | Cranktime varies with the amount of current drawn. If cranking draws moreamps than the charger can provide, crank time may be less than 3seconds. |
| Failureto wait 3 minutes (180 seconds) between cranks. | Wait3 minutes of rest time before the next crank. |
| Clipsare not making a good connection. | Checkfor poor connection at battery and frame. |
| ACcord and/or extension cord is loose. | Check power cord andextension cord for loose fitting plug. |
| Nopower at receptacle. | Checkfor open fuse or circuit breaker supplying AC outlet. |
| Thecharger may be overheated. | Thethermal protector may have tripped and needs a little longer to reset.Make sure the charger vents are not blocked. Wait and try again. |
| Batterymay be severely discharged. | Ona severely discharged battery, charge for 10 to 15 minutes in thehighest charge rate to help assist in cranking. |
| Charger will not turnon when properly connected. | ACoutlet is dead. | Checkfor open fuse or circuit breaker supplying AC outlet. |
| Poorelectrical connection. | Checkpower cord and extension cord for loose fitting plug. |
| The battery isconnected and the charger is on, but is not charging. | Clipsare not making a good connection. | Checkfor poor connection at battery and frame. Make sure connecting pointsare clean. Rock clips back and forth for a better connection. |
| Thecharger is in tester mode, not charge mode. | Pressthe Charge Rate button to activate charging and select a charge rate. |
| The measured currentis much lower than what was selected. | Thecharger reached the maximum voltage and is reducing the current. | Noproblem; this is a normal condition. |
| The DIGITAL DISPLAYalways flashes before the battery is completely charged. | Theincorrect BATTERY TYPE may have been selected. | Resetthe charger by briefly unplugging it or briefly disconnecting thenegative battery clip. Be sure to reset the charger to the propersettings. |
| Thebattery did not reach full charge within 24 hours. | Maybe due to a very large battery or bank of batteries requiring morepower than the charger can deliver within 24 hours. |
| Thebattery is defective. | Have battery checked. |
| The CHARGED (green)LED lights a few minutes after connecting to the battery. | Thebattery may be fully charged or recently charged, leaving the batteryvoltage high enough to appear to be fully charged. | Ifthe battery is in a vehicle, turn the headlights on for a few minutesto reduce the battery voltage and try charging again. |
| Theincorrect BATTERY TYPE may have been selected. | Resetthe charger by briefly unplugging it or briefly disconnecting thenegative battery clip. Be sure to reset the charger to the propersettings. |
| Theindicator lights are lit in an erratic manner not explained in thismanual. | Youmight have accidentally activated a special diagnostic mode. | Makesure nothing is touching the control panel, then unplug the charger andplug it in again. |
| Schumacher User Manual Link |
