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G & MG Series Granita Machine Page 17
Troubleshooting Guide
The following procedures must be performed by a qualified service technician.
Problem Possible Cause Solution
The machine does not cool, or cools
only partially, but the compressors
are running
The machine does not cool or cools
only partially, but one or more of the
compressors are not running
The machine over-freezes, making
the auger movement slow or
stopped
The machine is noisy
The main power switch is “On”. The
unit is not running.
Product is leaking out of the bowl
• Allow at least 8” (20cm) between the
machine and anything next to it; keep
away from heat sources
• Return to freeze mode
• Remove the side panels. Using a
brush or compressed air clean the
condenser
• Check the fan motor’s electrical
connections and, if disconnected,
reconnect. If still not operating,
replace the motor
• Locate the leak, eliminate it and
recharge the system
• Replace the malfunctioning
components
• Check the contacts and correct those
that are incomplete
• Replace the compressor(s)
• Check the electrical connections to
the PC board as well as the
transformer feeding the PC board
and correct
• Check the product brix and correct
• Reset the screw toward the “-”
position to produce a thinner
consistency product
• Using pliers, straighten the limit switch
arm
• Add more product or turn the
refrigeration “Off”
• Replace the PC board
• Check and correct
• Replace the fuse(s)
• Clean the condenser or add
ventilation space around the machine
(the cutout switch reset is automatic
when the conditions are corrected)
• Check the contacts and correct those
that are incomplete
• Replace the switch
• Replace or reposition the seals
• The space around the machine is
inadequate for ventilation
• Freezer is in defrost
• The condenser fins are clogged with
airborne particles
• Fan motor is not running
• Refrigerant is leaking
• Electrical components of the
compressor(s) are not functioning
• Some electrical connections are not
complete
• One or more of the compressors are
malfunctioning
• No current is coming to the “com-
pressor delay” PC board
• The product brix is too low
• The screw setting for the product
consistency control system is set too
far toward the “+” position
• The limit switch arm is bent away
from the gearmotor and prevents
contact
• The level of the product in the bowl is
too low, exposing the auger
• The compressor PC board contacts
don’t open
• The fan motor blades are hitting
internal components
• The fuse(s) are blown
• The pressure cutout switch has
activated
• Some electrical connections are not
complete
• The main power is not functioning
• One of the bowl seals is not in place