Repairs of electrical parts and refrigeraion circuit
Trouble shooting
only by qualified technician
Malfunction
Cause
Remedial Action
Machine operates - but no ice production
Freezing unit and
loss of refrigerant
check refrigeration circuit (bubbles in
refrigeration unit work
sight glass), eliminate leakage, evacuate
circuit, refill refrigerant
Freezing unit works,
*
no water in water chamber
see water level control (page 5)
refrigeration unit does not
*
motor cut-out defective
check / replace
*
compressor defective
check / replace
Ice jam in ice outlet
Defective light barrier
check (see page 6)
or ice hose
consult ZIEGRA
Decrease of ice production
*
Condenser soiled or
clean with brush or compressed air, never
poor ice quality
insufficientcooling water flow
with a wire brush. Watercooled machines:
bottle brush, antilime agent, clean water
filter. Open further the water control valve.
*
ambient temperature too high
machine must not be placed in the sun or
too warm ambience. Improve ventilation.
*
expansion valve misadjusted
adjust evaporation temperature as
indicated. Check thermal feeler pipe
and contact at evaporator outlet.
*
insufficient amount of refrigerant,
remove leak, evacuate circuit, refill
bubbles in sight glass
with indicated quantity of refrigerant
*
lime deposit on auger or cylinder
clean freezing unit (see page 8)
*
machine has switched off
also consider possible water shortage
in between times
or malfunction with a central refrigeration
plant.
*
capacity control misplaced
Shut the capacity control. Adjust over-
heating of the machine according to the
data sheet. Adjust capacity control at
1 K below evaporation temperature.
Cracking noise
cylinder bearing defective
replace
in freezing unit
Ice comes out of machine
After leaving the cylinder, the ice
check that there are no small edges or
in pressed form
is pressed due to wrong installation
bends. Amend.
("sausages")
of the ice discharge tube, the
see page 2
tube extension of the outlet
or due to sharp bends.
*
V-belt loose or defective
tighten / replace (see page 4 - V-belt)
loud squeaking noise
*
lime deposit on auger or cylinder
Clean freezing unit (see page 8)
strong vibrations
freezing unit freezes up
*
air bubble in hose between
remove air bubble
water chamber and freezing unit
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