No Ice, Machine
Off
CM Cubed Service
Diagnosis - Main Chart
Remove Front
Panel, Check if
Controller Has Any
Lights On.
Any Lights On?
No
Check power to
unit, see Power
Page
Yes
See Chart W
Yes
See Chart R
Yes
See Chart B
Yes
See Chart O
Yes
See Chart C
Yes
See Chart F
Yes
Check which light
is on.
Water and Off?
No
Refrigeration &
Off?
No
Bin Full?
No
Off?
No
Clean?
No
Freeze or
Harvest?
Chart W
From Main Chart
Water Diagnostic
Light Blinks Once
and Repeats
Yes
Check water pump,
see Pump Page
Yes
Check for slow or
no water fill, see
Water Page
Yes
Check for water
inlet valve leak thru,
see Water Page
No
Water Diagnositc
Light Blinks Twice
and Repeats
No
Water Diagnostic
Light is On without
blinking
Machine Operating
No
Water AND
Refrigeration Lights
are On without
blinking
Yes
Thermistor harness
may be unplugged
Harness
plugged in?
Yes
Replace Thermistor
Set
No
Plug In
Chart R
From Main Chart
Refrigeration Diagnostic
Light blinks once and
repeats
Yes
Check for cause of
slow harvest, see
Harvest Page
Yes
Check for cause of
no ice being
harvested or
sensed. See
Harvest Page
Yes
Check for cause of
high discharge
temperature
No
Refrigeration Diagnostic
Light blinks twice and
repeats
No
Refrigeration Diagnositic
Light blinks three times and
repeats
No
Refrigeration Diagnostic
Light is on without blinking
Yes
Check for cause of
long freeze cycle,
see Freeze Page
Chart B
From Main Chart
Check for ice
between photo-eyes
Ice in between?
Yes
Remove ice,
machine will start in
less than 4 minutes
Yes
Clean photo-eyes
with ice machine
cleaner
No
Line up eyes
No
Dry the photo-eyes
No
Scale on eyes?
No
Eyes in
alignment>
Yes
Eyes dry?
Yes
Replace eyes
Chart F
From Main Chart
Machine should be
operating, check
loads for voltage
Power to
contactor coil?
Yes
Coil OK?
No
No
Power to water
pump?
Replace contactor
Yes
Push Off, then
Freeze
Machine starts?
No
Replace Controller
No
Power to fan
motor?
Yes
No
In harvest?
Yes
Normal
No
Harness OK?
No
Replace harness
Yes
From Main Chart
Chart O
Push freeze, ask
user why unit
switched off
Machine switched
off by user
Chart C
From Main Chart
In Clean cycle
Is Clean light on
but blinking?
Yes
Push Clean
No
Push Freeze
From Main Chart
Power Page
Power
No
Restore Power
No
Replace
transformer
Yes
Check Transformer
Transformer
OK?
Yes
Machine operating
Check for voltage to
controller
Voltage?
No
Check harness,
clean pins
Yes
Check for lights
Lights?
No
Replace controller
Yes
Pump Page
From Chart W
Water Diagnostic Light Blinks
Once and Repeats
Yes
Check water pump
Pump OK?
No
Check voltage to
pump
Voltage OK?
No
Check harness and
pins
Yes
Replace pump
Water Page
From Chart W
Water Diagnostic Light
Blinks Twice and Repeats
Yes
Check for
slow or no
water fill
Water valve
OK?
Is valve screen
dirty?
Yes
Yes
Clean
screen
No
No
Check for
power to valve
Water to unit?
Water filters
restricted?
Yes
No
No
Yes
Restore water
supply
Replace filter
cartridges
Power?
Water diagnostic light is ON
without blinking?
Yes
Valve working?
No
Replace
valve
No
Yes
No
Clean harness,
check pins
Yes
Machine Operating
Check for water
inlet valve leak thru
Yes
Voltage at pins
but not valve?
Yes
Water valve
leaking thru?
Yes
Voltage to coil?
No
No
No
Replace valve
Reset controller
Replace controller
Replace
harness
Harvest Page
From Chart R
Refrigeration Diagnostic
Light blinks once and
repeats
Yes
Check for cause of
slow harvest
Hot gas valve
opens fully?
Ice path
restricted?
Yes
Yes
No
No
No
Refrigerant
charge correct?
No
Remove restriction
No
Lime scale on
evaporators?
Locate leak, repair
and rechage
Check voltage to
hot gas valve
Yes
Clean water system
Refrigeration Diagnostic
light blinks twice and
repeats
Reset controller
Voltage?
Yes
No
Replace hot
gas valve
Check harness
and pins
Check for cause of
no ice being
harvested or
sensed
Can photo-eyes
see ice>
No
Pins and
harness OK?
Clean photo-eye
emitter and receiver
Yes
Check harness
Replace controller
Unplug harness
from #4, short pins
together
Bin full light
blinks?
Yes
Replace photo eyes
No
No
Clean pins or
replace harness
Machine operates
From Chart R
Freeze Page
Refrigeration Diagnostic
Light is ON without
blinking
Yes
Check for cause of
long freeze cycle
If water cooled
check for water
having been shut
off
No
Voltage to
motor?
Fan motor
turns?
Yes
Yes
Check condenser
filter or fins for dirt
Replace
Fan Motor
No
Condenser
dirty?
Water shut off?
Yes
Clean condenser
Check harness
Yes
Machine Operates
Reset controller
Harness OK?
No
Replace harness
Yes
Check/Clean pins
Power to Fan?
No
Replace controller
Yes