Troubleshooting Guide
The following procedures must be performed by a qualified service technician.
CAUTION: Unplug the machine before cleaning or servicing the unit.
| Problem | Possible Cause | Solution |
|
|
|
|
|
|
| Grinder will not start when START | • Plug not in outlet properly | • Install plug in outlet |
|
| button is pushed | • No power to outlet | • Check outlet with lamp or radio to verify |
|
|
|
| outlet has power. |
|
|
| • Circuit breaker has tripped | • Reset circuit breaker by pushing in reset |
|
|
|
| button until you hear a click |
|
|
|
|
|
|
| Grinder runs or hums but no | • Shear disc is broken | • Replace shear disc. See “Shear Disc |
|
| coffee is dispensed |
| Replacement” section or instructions on |
|
|
|
| inside of upper front plate. |
|
|
| • Obstruction in opening to grinding | • Remove hopper and clear obstructions. |
|
|
| chamber |
|
|
|
| • Auger has stalled (Models 250, 250A | • Clean auger |
|
|
|
|
| |
|
| • 250RH Models: Hoppers not properly in | • Make sure hoppers are seated in their |
|
|
| place | allocated area |
|
|
|
|
|
|
| Excessive amount of chaff flying | • Defective chaff mixer spring | • If bent, broken, or missing, |
|
| about |
| replace spring. |
|
|
|
| • If stuck open with coffee, clean coffee to |
|
|
|
| free spring |
|
|
| • Static electricity | • Tighten all nuts, bolts, and screws and |
|
|
|
| verify outlet is grounded. |
|
|
|
|
|
|
| Quantity of coffee dispensed each | • Auger stalls (Models 250, 250A, | • Refer to problem as listed below in this |
|
| throw is not the same | Troubleshooting Guide. |
| |
|
| • Timer delay is not working or running | • See “Timer Adjustment” section |
|
|
| long enough | • Check the length of time the grinder |
|
|
|
| runs |
|
|
| • Defective timer | • If time varies more than plus or minus |
|
|
|
| 1%, replace timer. |
|
|
|
|
|
|
| Knobs do not operate smoothly | • Coffee beans or bean dust may have | • With machine unplugged, clean carrier |
|
|
| clogged carrier |
|
|
|
|
|
|
|
| Auger does not turn | • Coffee beans or bean dust may have | • With machine unplugged, clean auger |
|
|
| jammed auger | opening |
|
|
| • 250RH Models: Hopper not properly | • Make sure hopper is seated in its |
|
|
| seated | designated area (see Figure A) |
|
|
|
|
|
|
| Auger will not operate | • Motor or link is binding | • Check all alignment of link and motor. |
|
|
|
| Check tightness of motor mounting |
|
|
|
| screws. |
|
|
| • Auger motor has burned out | • Replace motor |
|
|
| • Wiring harness to motor is loose | • With machine unplugged, check to see |
|
|
|
| if wires are connected to motor |
|
|
| • 250RH Models: Hopper not properly | • Make sure hopper is seated in its |
|
|
| seated | designated area (see Figure A) |
|
|
|
|
|
|
| Circuit breaker continuously trips | • Insufficient current due to use of | • Plug unit directly into outlet. Do not use |
|
|
| extension cord | extension cord. |
|
|
| • Insufficient current due to overloaded | • Designate single line for grinder. Do not |
|
|
| line | use |
|
|
| • Grind setting needs adjustment | • Adjust grind to coarser setting (see |
|
|
|
| “Grind Adjustment” section) |
|
|
|
|
|
|
|
|
| continued on next page | |
|
|
|
|
|
| 115 & 250 Series Coffee Grinders |
| Page 8 |
|
|
|
|
|
|