Grindmaster 250RH-3 - Manual (Page 9)

115 & 250 Series Coffee Grinders Page 8
Troubleshooting Guide
The following procedures must be performed by a qualified service technician.
CAUTION: Unplug the machine before cleaning or servicing the unit.
Problem Possible Cause Solution
Grinder will not start when START
button is pushed • Plug not in outlet properly
• No power to outlet
• Circuit breaker has tripped
• Install plug in outlet
• Check outlet with lamp or radio to verify
outlet has power.
• Reset circuit breaker by pushing in reset
button until you hear a click
Grinder runs or hums but no
coffee is dispensed • Shear disc is broken
• Obstruction in opening to grinding
chamber
• Auger has stalled (Models 250, 250A
250RH-2 & 250RH-3 only).
• 250RH Models: Hoppers not properly in
place
• Replace shear disc. See “Shear Disc
Replacement” section or instructions on
inside of upper front plate.
• Remove hopper and clear obstructions.
• Clean auger
• Make sure hoppers are seated in their
allocated area
Excessive amount of chaff flying
about • Defective chaff mixer spring
• Static electricity
• If bent, broken, or missing,
replace spring.
• If stuck open with coffee, clean coffee to
free spring
• Tighten all nuts, bolts, and screws and
verify outlet is grounded.
Quantity of coffee dispensed each
throw is not the same • Auger stalls (Models 250, 250A,
250RH-2, and 250RH-3 only)
• Timer delay is not working or running
long enough
• Defective timer
• Refer to problem as listed below in this
Troubleshooting Guide.
• See “Timer Adjustment” section
• Check the length of time the grinder
runs
• If time varies more than plus or minus
1%, replace timer.
Knobs do not operate smoothly • Coffee beans or bean dust may have
clogged carrier
• With machine unplugged, clean carrier
Auger does not turn • Coffee beans or bean dust may have
jammed auger
• 250RH Models: Hopper not properly
seated
• With machine unplugged, clean auger
opening
• Make sure hopper is seated in its
designated area (see Figure A)
Auger will not operate • Motor or link is binding
• Auger motor has burned out
• Wiring harness to motor is loose
• 250RH Models: Hopper not properly
seated
• Check all alignment of link and motor.
Check tightness of motor mounting
screws.
• Replace motor
• With machine unplugged, check to see
if wires are connected to motor
• Make sure hopper is seated in its
designated area (see Figure A)
Circuit breaker continuously trips • Insufficient current due to use of
extension cord
• Insufficient current due to overloaded
line
• Grind setting needs adjustment
• Plug unit directly into outlet. Do not use
extension cord.
• Designate single line for grinder. Do not
use multi-outlet box.
• Adjust grind to coarser setting (see
“Grind Adjustment” section)
continued on next page