CM Cubed Service Diagnosis - Main Chart

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1 Ice, Machine Off CM Cubed Service Diagnosis - Main Chart Remove Front Panel, Check if Controller Has Any Lights On. Any Lights On? Check power to unit, see Power Page Check which light is on. Water and Off? See Chart W Refrigeration & Off? See Chart R Bin Full? See Chart B Off? See Chart O Clean? See Chart C Freeze or Harvest? See Chart F

2 Chart W From Main Chart Water Diagnostic Light Blinks Once and Repeats Check water pump, see Pump Page Water Diagnositc Light Blinks Twice and Repeats Check for slow or no water fill, see Water Page Water Diagnostic Light is On without blinking Check for water inlet valve leak thru, see Water Page Machine Operating Water AND Refrigeration Lights are On without blinking Thermistor harness may be unplugged Harness plugged in? Plug In Replace Thermistor Set

3 Chart R From Main Chart Light blinks once and repeats slow harvest, see Harvest Page Light blinks twice and repeats no ice being harvested or sensed. See Harvest Page Refrigeration Diagnositic Light blinks three times and repeats high discharge temperature Light is on without blinking long freeze cycle, see Freeze Page

4 Chart B From Main Chart Check for ice between photo-eyes Ice in between? Remove ice, machine will start in less than 4 minutes Scale on eyes? Clean photo-eyes with ice machine cleaner Eyes in alignment> Line up eyes Eyes dry? Dry the photo-eyes Replace eyes

5 Chart F From Main Chart Machine should be operating, check loads for voltage Power to contactor coil? Push Off, then Coil OK? Machine starts? Freeze Replace Controller Power to water pump? Replace contactor Power to fan motor? In harvest? rmal Harness OK? Replace harness

6 From Main Chart Chart O Machine switched off by user Push freeze, ask user why unit switched off Chart C From Main Chart In Clean cycle Is Clean light on but blinking? Push Freeze Push Clean

7 From Main Chart Power Page Power Restore Power Check Transformer Transformer OK? Replace transformer Check for voltage to controller Machine operating Voltage? Check harness, clean pins Check for lights Lights? Replace controller

8 Pump Page From Chart W Water Diagnostic Light Blinks Once and Repeats Check water pump Pump OK? Check voltage to pump Voltage OK? Replace pump Check harness and pins

9 From Chart W Water Page Water Diagnostic Light Blinks Twice and Repeats Check for slow or no water fill Water valve OK? Is valve screen dirty? Clean screen Check for power to valve Water to unit? Water filters restricted? Restore water supply Replace filter cartridges Power? Valve working? Water diagnostic light is ON without blinking? Replace valve Clean harness, check pins Check for water inlet valve leak thru Machine Operating Water valve leaking thru? Voltage to coil? Voltage at pins but not valve? Replace harness Replace controller Reset controller Replace valve

10 From Chart R Harvest Page Light blinks once and repeats slow harvest Hot gas valve opens fully? Ice path restricted? Refrigerant charge correct? Remove restriction Lime scale on evaporators? Check voltage to hot gas valve Locate leak, repair and rechage Clean water system light blinks twice and repeats Reset controller Voltage? Check harness and pins Replace hot gas valve Machine operates no ice being harvested or sensed Can photo-eyes see ice> Pins and harness OK? Clean pins or replace harness Clean photo-eye emitter and receiver Check harness Replace controller Unplug harness from #4, short pins together Bin full light blinks? Replace photo eyes

11 From Chart R Freeze Page Light is ON without blinking long freeze cycle Fan motor turns? If water cooled check for water having been shut off Voltage to motor? Replace Fan Motor Check condenser filter or fins for dirt Condenser dirty? Clean condenser Water shut off? Check harness Reset controller Harness OK? Replace harness Machine Operates Check/Clean pins Power to Fan? Replace controller

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