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-2 & 250RH-3 only).

 

 

 

 

• 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

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

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 multi-outlet box.

 

 

 

• Grind setting needs adjustment

• Adjust grind to coarser setting (see

 

 

 

 

“Grind Adjustment” section)

 

 

 

 

 

 

 

 

 

continued on next page

 

 

 

 

 

 

115 & 250 Series Coffee Grinders

 

Page 8

 

 

 

 

 

 

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Grindmaster 250AB, 250RH-2, 250RH-3, 115AB instruction manual Troubleshooting Guide
Page 8 Page 10

250A, 115AB, 250RH-3, 250RH-2, 250AB specifications

The Grindmaster coffee machines, specifically models 250AB, 250RH-2, 115AB, 250A, and 250RH-3, represent a blend of advanced technology and user-friendly design aimed at enhancing the coffee brewing experience. These machines are primarily used in commercial settings, where consistency and quality are paramount.

Starting with the Grindmaster 250AB, this model is designed for heavy-duty usage, integrating an automatic brewing feature that ensures optimal extraction of coffee flavors. The 250AB is equipped with a digital control panel that allows operators to customize brew times and temperatures. This model's stainless steel construction not only guarantees durability but also provides an aesthetically pleasing finish that complements any café or restaurant environment.

Moving on to the 250RH-2, this model features a dual-heating system that allows for simultaneous brewing and maintaining temperature, ideal for high-demand settings. It boasts precise electronic controls that make it easy to replicate recipes and achieve the desired taste consistently. With an adjustable drip tray, the 250RH-2 accommodates various cup sizes, making it versatile for different customer needs.

The Grindmaster 115AB, known for its compact design, is perfect for smaller establishments without compromising on capability. It offers a single brewer with a quick heating time, so coffee can be brewed rapidly to meet customer demand. Additionally, the 115AB includes an easy-to-read LED display for monitoring and adjustment.

The 250A model focuses on efficiency with its streamlined design that prioritizes user convenience. It includes a large capacity water reservoir that minimizes the need for frequent refills and facilitates continuous brewing. The self-cleaning feature enhances hygiene and reduces maintenance time, making it an excellent choice for busy coffee shops.

Lastly, the 250RH-3 adds further improvements with its enhanced brew basket technology, which optimizes coffee ground saturation for even better extraction. Like the previous models, it features digital controls and programmable options, allowing for precise adjustments tailored to specific coffee profiles.

Overall, the Grindmaster series, with its various models, offers solutions that cater to a range of business sizes and coffee preferences. Their focus on durability, user-friendliness, and technological advancement has established them as a reliable choice for professional coffee brewing.
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