Coffee Brewers
Grindmaster
®
21
Troubleshooting Guide (continued)
PROBLEM
POSSIBLE CAUSE
SERVICE CHECK
SOLUTION
Brew volume is erratic
•
Inlet water pressure is
•
Check if water flow to
•
Correct water supply to
low or erratic during
machine is restricted
ensure water flow rate is
the brew sequence
or is being affected
sufficient (30-80psi on a
by other equipment
minimum ¼” ID water
operating from the
line). Note: Long water
same line
lines may provide
adequate static pressure
but will cause a large
pressure drop and
restricted flow
Brew cycle will not
•
Coffee shuttle is not in
•
Ensure the proper
•
Install Coffee shuttle on
start
place
coffee container is in
machine in correct position
place and detected
•
Brew basket is not in
•
Ensure the brew
•
Handle must be installed
place
basket is in place and
straight for the presence
the handle is not off
switch to detect the
to either side
basket
•
Minimum water
•
Allow water tank to
•
Alter minimum water
temperature defined in
reach minimum
tank temperature of
programming has not
temperature
disable low temp / no
been reached
brew if desired to avoid
delays
Shuttle backlighting is
•
Shuttle is not seated on
•
Check shuttle
•
Re-seat shuttle onto
not working
machine
placement
shelf
Coffee agitation is not •
Mixing pill is missing or
•
Inspect inside of
•
Replace mixing pill and
working
misplaced in coffee
shuttle for missing or
ensure mixing pill in
shuttle
misplaced mixing pill
centered in the shuttle
liner and that is has a
good magnetic couple to
the drive magnet
•
Mixing motor is faulty
•
Inspect agitation
•
Replace motor is this test
motor for rotation by
does not activate the
applying 24 vdc to
motor
input terminals
•
Mixing motor
•
Inspect motor
•
Re-make the motor
connections are faulty
connections at both
electrical connections
the disconnect, and
heater control board
WARNING:
To reduce the risk of electrical shock, unplug the power cord before repairing or replacing
any internal components of the unit. Before any attempt to replace a component, be sure to check all electrical
connections for proper contact. Only a qualified service technician should perform electrical and mechanical
adjustments or repairs.
