16
Grindmaster
®
Coffee Brewers
Troubleshooting Guide
The following pages are provided to help determine the cause of problems with operation of the brewers and to
indicate the appropriate solution for the problems. For each problem, the possible causes should be checked in
the order shown until the exact nature of the problem is determined.
The following procedures must be performed by a qualified service technician. Disconnect power to
machine before servicing.
Before you call for help, please read the following:
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.
Error Messages
PROBLEM
POSSIBLE CAUSE
SERVICE CHECK
SOLUTION
Display does not
•
Branch circuit is
•
Check branch circuit
•
Turn on power at branch
illuminate
disconnected
circuit
•
Power switch on back
•
Check power switch
•
Flip power switch up to
of machine is in OFF
the ON position
position
•
Control circuit breaker
•
Check circuit breaker
•
Press plunger on circuit
has tripped
breaker located next to
the power switch on the
back of the unit
•
Universal power supply
•
Check universal
Replace power supply if
is faulty
power supply input
needed
and output voltage
Input voltage should
read AC line voltage
DC output should
read 24vdc
•
Power supply
•
Check power supply
•
Ensure connections are
connections are
connections
made at both the power
disconnected
supply and the controller
input
•
Control to LCD display
•
Check ribbon cable
•
** Re-seat ribbon cable
ribbon cable
connections to both
connections as shown
connection is faulty
display and control
on page 18. (note: ribbon
board
cable provides all power
and communication to
display)
•
Faulty display
•
Perform all other
•
Replace display only if all
checks first
other checks do not
resolve the issue
