Troubleshooting Guide for Grind Selector™ Mechanism (Models 115AB and 250AB)

The following procedures must be performed by a qualified service technician.

Problem

Possible Cause

Solution

 

 

 

Loud grating noise

• Burrs are touching each other on fine

• Readjust fine grind setting, see “To

 

grind setting

Adjust Fine Grind” section

 

 

 

Rumbling noise

• Thrust bearing rotating inside flange

• Replace thrust bearing and shear cap

 

bearing

 

 

 

 

Chattering or buzzing noise

• Solenoid may have failed to seat or

• Check alignment of solenoid and

 

close fully (Models 115AB &

shift arm

 

250AB only)

• Also check the tightness of the solenoid

 

 

mounting screws

 

 

 

Loud vibration noise during grinding

• Cotter pin in the thumb screw linkage

• Attempt to spread flanges of cotter pin

when Grind Selector™ is not activated

may be vibrating

or replace cotter pin

 

 

 

Grind Selector™ fails to activate

• Wiring harness loose

• WITH MACHINE UNPLUGGED, check

 

 

wiring harness connections to see if

 

 

they are secure on the timer terminals

 

• Solenoid has burned out (Models 115AB

• Replace solenoid

 

& 250AB only)

 

 

 

 

If you still need help, call our Service Department at (502) 425-4776 or (800) 695-4500 (USA & Canada only) (Monday through Friday 8am-6pm EST) or an authorized service center in your area. Please have the model and serial number ready so that accurate information can be given.

Prior authorization must be obtained from Grindmaster Corporation’s Technical Services Department for all warranty claims.

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115 & 250 Series Coffee Grinders

 

 

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Grindmaster 250AB Loud grating noise, Rumbling noise, Chattering or buzzing noise, Loud vibration noise during grinding

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.