Grindmaster 250RH-3 User Manual download pdf (Page 9)

115 & 250 Series Coffee Grinders Page 8

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

button is pushed

• Plug not in outlet properly

• No power to outlet

• Circuit breaker has tripped

• Install plug in outlet

• Check outlet with lamp or radio to verify

outlet has power.

• Reset circuit breaker by pushing in reset

button until you hear a click

Grinder runs or hums but no

coffee is dispensed

• Shear disc is broken

• Obstruction in opening to grinding

chamber

• Auger has stalled (Models 250,

250A

250RH-2 & 250RH-3 only).

• 250RH Models: Hoppers not properly in

place

• Replace shear disc. See “Shear Disc

Replacement” section or instructions on

inside of upper front plate.

• Remove hopper and clear obstructions.

• Clean auger

• Make sure hoppers are seated in their

allocated area

Excessive amount of chaff flying

about

• Defective chaff mixer spring

• Static electricity

• If bent, broken, or missing,

replace spring.

• If stuck open with coffee, clean coffee to

free spring

• Tighten all nuts, bolts, and screws and

verify outlet is grounded.

Quantity of coffee dispensed each

throw is not the same

• Auger stalls (Models 250, 250A,

250RH-2, and 250RH-3 only)

• Timer delay is not working or running

long enough

• Defective timer

• Refer to problem as listed below in this

Troubleshooting Guide.

• See “Timer Adjustment” section

• Check the length of time the grinder

runs

• If time varies more than plus or minus

1%, replace timer.

Knobs do not operate smoothly • Coffee beans or bean dust may have

clogged carrier

• With machine unplugged, clean carrier

Auger does not turn • Coffee beans or bean dust may have

jammed auger

• 250RH Models: Hopper not properly

seated

• With machine unplugged, clean auger

opening

• Make sure hopper is seated in its

designated area (see Figure A)

Auger will not operate • Motor or link is binding

• Auger motor has burned out

• Wiring harness to motor is loose

• 250RH Models: Hopper not properly

seated

• Check all alignment of link and motor.

Check tightness of motor mounting

screws.

• Replace motor

• With machine unplugged, check to see

if wires are connected to motor

• Make sure hopper is seated in its

designated area (see Figure A)

Circuit breaker continuously trips • Insufficient current due to use of

extension cord

• Insufficient current due to overloaded

line

• Grind setting needs adjustment

• Plug unit directly into outlet. Do not use

extension cord.

• Designate single line for grinder. Do not

use multi-outlet box.

• Adjust grind to coarser setting (see

“Grind Adjustment” section)

continued on next page

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Grindmaster 250RH-3 User Manual Page 9

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