Troubleshooting: Filling, Heating, and Brewing

Brewing Problems

The brewing system consists of the following components:

•Start and Stop, switches located in the top control panel.

•Brew Timer, located in the top control section under the top cover.

•Brew Valve, located in the top control section under the top cover.

Problem

Possible Cause

Service Check

Remedy

 

 

 

 

 

 

 

 

Brew volume too

Timer out of

Compare timer setting to

Adjust timer.

large or too small.

adjustment.

factory setting chart.

 

 

 

 

 

 

Pressure not

Fill valve should cycle on

If fill valve does not cycle or takes

 

and off frequently during

too long to refill, be sure water line

 

adequate at urn.

 

brew cycle when all brew

is 3/8" and pressure is uninterrupted

 

 

 

 

heads are used.

30psi.

 

 

 

 

 

Spray head clogged.

Visual

Clean all holes.

 

 

 

 

 

Brew valves clogged

Visual, inspect brew

Clean lime from valve. Seat cup or

 

with lime.

 

valve.

 

 

 

 

 

Timer faulty.

Brew time does match

entire valve may need replacement.

 

 

timer setting. Timer not

Replace timer.

 

 

adjustable.

 

Brew volume erratic.

Timer faulty.

Measure brew time for

If time is different from batch to

(there is always some

 

inconsistencies.

batch, replace timer.

small variation from

 

 

 

Pressure fluctuations

Check pressure at urn

Plumb water line so its pressure is

batch to batch)

at urn.

 

inlet.

not influenced by other appliances.

Brew will not

Circuit breaker

If circuit breaker button

If tripped, find cause and reset. If

start.

tripped or faulty.

is out, breaker is tripped.

faulty, replace.

 

 

Check 120V across

If 120V is across brew valve, but brew

 

Brew valve faulty.

valve doesn't open, replace coil or

 

brew valve.

 

 

valve.

 

 

Check for continuity

If no continuity, replace switch.

 

Stop switch faulty.

across stop switch

 

 

when not pressed.

 

 

 

 

 

 

 

 

 

Start switch faulty.

Check 120V between

If start switch does not provide 120V

 

S.S. and N on timer

 

start signal, replace switch.

 

 

 

 

when start is pressed.

 

 

 

 

 

 

 

 

Low temp/no brew

Water is above 190°F

Turn down brew thermostat, see

 

thermostat set too

(88°C), but HOT

adjustments.

 

high.

WATER light is off.

 

 

 

 

 

 

Timer faulty.

Check 120V between H

If no 120V BREW output from timer,

 

 

and N on timer. If OK,

replace timer.

 

 

check for 120V between

 

 

 

BREW and N on timer

 

 

 

after pressing start.

 

 

 

 

 

Spray head will not

Boiling tank.

If drip is from right

Turn down thermostat. If that doesn't

stop dripping water.

 

side, check for water

cure, check for faulty thermostat or

(spray heads normally

 

from overflow outlet at

heater relay.

drip slightly after

 

top of tank.

 

brew)

Limed up brew valve.

Visual check of valve.

Clean valve. Valve seal or entire

 

 

valve may need replacement.

 

 

 

 

Shuttle Brewers & Airpot/Shuttle Brewers

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Grindmaster RAP400E, RAPS300E, RAP300E, RAPS400E Problem Possible Cause Service Check Remedy Brew volume too
Page 12 Page 14

P300E, RAPS400E, P400E, RAP300E, RAP400E specifications

The Grindmaster RAP300E, RAP400E, P400E, RAPS400E, and RAPS300E are advanced coffee grinding machines designed for high-performance use in cafés, restaurants, and coffee shops. These models incorporate innovative technologies that cater to the increasing demand for efficiency and precision in coffee preparation.

Starting with the RAP300E, this grinder boasts an impressive grinding speed, ensuring that coffee enthusiasts can swiftly grind their favorite beans without sacrifice to flavor integrity. It features an intuitive display which allows for easy operation and adjustment of grind settings. The RAP300E utilizes durable burrs, enhancing its ability to maintain a consistent grind size, a critical factor for achieving the perfect espresso shot.

The RAP400E enhances the capabilities of the RAP300E with a stronger motor that accommodates larger volumes of coffee beans. This feature is particularly useful for businesses with high customer turnover. Additionally, this model includes advanced noise reduction technology, allowing for quieter operation—a significant advantage in busy coffee environments where the ambience matters.

The P400E makes its mark with a focus on portability and compact design. Ideal for smaller coffee shops or mobile setups, it retains the essential features found in larger models without compromising on quality. Users will appreciate its lightweight construction and easy-to-navigate interface, making it a standout choice for baristas on the go.

In the RAPS400E and RAPS300E models, Grindmaster introduces the innovative Automatic Portion System (APS), which ensures precise measurements for each coffee grind. This technology reduces wastage and ensures consistency in serving sizes, thereby maintaining the quality of each cup brewed. Both models offer extensive customization options for grind settings, enabling baristas to experiment with various brew methods.

Moreover, all these machines are built with user-friendly maintenance features. They offer easy access to the burrs for cleaning and adjustment, extending the lifespan of the equipment. The machines are also made from high-quality materials that ensure durability, crucial for demanding work environments.

In summary, the Grindmaster RAP series, along with the P400E, represents a leap in coffee grinding technology. These models are tailored to meet the evolving needs of the coffee industry, combining user-friendly designs with advanced functionalities, making them invaluable assets for coffee professionals.
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