Troubleshooting Guide

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

CAUTION: Unplug power cord from outlet before cleaning or servicing the unit.

Problem		Possible Cause		Remedy
Weak coffee	•	Not enough coffee used	•	Set to portion more coffee.
	•	Grind is too coarse	•	Readjust grind to a finer grind.
	•	Water not hot enough	•	Check spray temp, should be
	•	Too much water used (half brews)		greater than 185°F.
	•	Too much water used (half brews)	•	Adjust brew time at the controller.
	•	Coffee bed has dry areas	•	Spray deflector broken or missing.
			•	Spray deflector broken or missing.
				Replace.
Strong coffee	•	Too much coffee used	•	Readjust coffee portion.

Bitter coffee	•	Grind is too fine	•	Coarsen grind setting.

Grounds in coffee	•	Paper filter collapsed during	•	Use proper filter.
		brewing

Brew basket overflowed	•	Too much coffee	•	Use no more than 3 1/2 oz. of coffee.
	•	Coffee ground too finely	•	Coarsen grind.
	•	Double batching	•	You must dump old coffee and use
				fresh new filter for each brew.

Unpleasant taste	•	Water tank or brew basket needs	•	Clean, sanitize (de-lime).
		cleaning	•	Refer to Regular Maintenance
				section.
Brewer will not brew	•	Basket has not been changed	•	Remove basket, replace filter,
				reinstall.

Grinder will not start when start	•	Main power switch turned off	•	Turn main power switch, on located
button is pushed				on back of unit (left side from front) on.
	•	No power to outlet	•	Check outlet with lamp or radio to
				verify outlet has power.
	•	Basket out	•	Ensure basket is in position.
	•	Circuit breaker has tripped	•	Reset circuit breaker (located on
				back of unit) by pushing the reset
				button in until you hear a click.
	•	Basket has not been changed	•	Remove basket, replace filter,
				reinstall.

Grinder runs or hums but no	•	Shear disc is broken	•	Replace shear disc. See Shear
coffee is dispensed				Disc Replacement section.
	•	Obstruction in opening of auger	•	Remove hopper and clear
		assembly (on dual bean units)		obstruction.
	•	Obstruction in opening to grinding	•	Remove hopper and clean
		chamber		obstruction.
	•	Slide valve is bending	•	Check for free operation of slide valve.
				Adjust solenoid mount or slide valve
				mount as required. Make sure white
				slide valve gasket is not touching
				moving parts.
	•	Blown fuse on controller board	•	Check for blown fuse and replace
		(Dual bean only)		with 5 Amp fuse.

Quantity of coffee dispensed	•	Defective timer in controller	•	Check the length of time grinder
each throw is not the same				runs with watch.
			•	Remove upper assembly and clean
				obstruction.
	•	Slide valve is binding	•	Check for free operation of slide
				valve. Adjust solenoid mount or
				slide valve mount as required.
				Make sure white slide valve gasket
				is not touching moving parts.

Grind’n Brew® Coffee Systems

Page 15

20H, 21H specifications

The Grindmaster 20H and 21H are robust, innovative espresso grinders designed to meet the demands of coffee shops and establishments that value precision and quality in their coffee production. These models stand out due to their advanced features, which cater to both high-volume usage and the desire for a consistent grind.

One of the main characteristics of the Grindmaster 20H and 21H is their powerful grinding mechanism. Equipped with high-quality ceramic burrs, these grinders provide an exceptionally uniform grind size, which is crucial for achieving the perfect extraction of coffee flavors. The ability to fine-tune the grind setting allows baristas to customize the grind for various espresso blends, ensuring that each shot is brewed to perfection.

Another significant feature of these models is their impressive grinding speed. With a grinding capacity that can handle a significant number of shots per minute, the Grindmaster 20H and 21H are ideal for busy coffee shops where efficiency is paramount. This capability helps reduce wait times during peak hours, enhancing customer satisfaction.

The design of the Grindmaster 20H and 21H is both ergonomic and user-friendly. The intuitive control panel allows baristas to easily adjust settings, making it straightforward to switch between different coffee blends. The grinders are also designed to minimize coffee retention, meaning less waste and fresher grounds for every cup.

Moreover, the Grindmaster 21H model includes additional smart technologies that enhance the grinding experience. Features like programmable dosing and digital displays offer even greater precision and ease of use. These technologies ensure that each dose of coffee is consistent, contributing to the overall quality of the espresso served.

In terms of build quality, both models boast a sturdy construction that ensures durability and longevity, making them a reliable investment for any coffee establishment. Their compact design allows for easy integration into various coffee setups without compromising on performance.

Overall, the Grindmaster 20H and 21H espresso grinders represent a perfect blend of innovation, efficiency, and reliability, making them essential tools for professional baristas and coffee enthusiasts alike. The advanced features and user-friendly design ensure that they can meet the high standards demanded by the modern coffee industry.