COMPRESSOR DIAGNOSTIC FLOW CHART Fill in data and circle yes or no as you go thru the chart.

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2 Ice Machine Problem Indicates Possible Malfunction COMPRESSOR DIAGNOSTIC FLOW CHART Fill in data and circle yes or no as you go thru the chart. Check Voltage Reference: volt minimum voltage is: volt minimum voltage is: volt minimum voltage is: 104 Is t Running Measure voltage at compressor. Voltage is Any voltage? Voltage too low See t Running Page Check power supply, control circuit, contactor coil, contactor points and wires Measure voltage at contactor: Voltage is Voltage at contactor too low Correct power supply problem runs, pumps, but the ice machine is not working properly Measure air temperature, water temperature and total cycle time (cubers) Air temp: Water temp: Total Cycle Is cycle time correct? See ice machine page Check cube size and ice formation Makes full batch of ice? t an ice machine capacity problem runs, but makes excessive noise Check mounting bolts and connecting tubing Abnormal noise from compressor? Trace and muffle or eliminate cause of noise is Running, but not pumping Check amp draw and system pressures Amp draw Hi side Lo side Amp draw low and refrigerant pressures equal? Change compressor

3 From Main Chart COMPRESSOR DIAGNOSTIC FLOW CHART t Running Page Check compressor shell temperature Temp: Shell hot? Overload protector may have tripped. starts after cooling down? Does the system have a full charge of refrigerant? Locate leak, repair and recharge Replace switch Check TXV and Hot Gas Valve Check if pump down pressure control switch may have stuck closed Switch sticks? off for more than 1 hour? Repair/replace TXV or Hot Gas Valve Check compressor winding resistance TXV & Hot Gas Valve OK? Check amp draw, compare to data in manual Amps normal? Is system remote air cooled? Check liquid line valve for leak thru Replace overload protector (if external) Liquid line valve leaks thru? Windings open or shorted? Replace compressor Replace liquid line valve Is it a single phase compressor? Operate Machine Again stops? Machine Operating Check start relay and start capacitor or PTCR Start relay and capacitor OK? Replace relay or capacitor Try new capacitors and relay or hard start kit or PTCR starts?

4 From Main Chart COMPRESSOR DIAGNOSTIC FLOW CHART Cube Ice Machine Page Cycle time too long? Check hot gas valve and inlet water valve for leak thru during the freeze cycle Hot gas valve or water valve leak thru? Cycle time too short? Check ice formation pattern Check water supply and control circuit Replace leaking valve Ice thinner or no ice at evaporator outlet? See common cycle times on later page. Cycle Time Reference: May vary up to15% Locate leak, repair and recharge Check system pressures Hi side Lo side Pressures normal for conditions? Discharge Pressure too high? Check suction line temperature, measure superheat, typical value is 6-10 o Superheat Charge low? Recover and weigh refrigerant charge Second Check? Too much refrigerant? Weigh in correct charge See Next Page Unit is Water Cooled Clean condenser, air filter (if used) and fan blade(s) Unit is Air Cooled Suction Pressure Low Recover and weigh refrigerant charge Charge Check condenser ambient intake temperature Temp Unit is Remote Air Cooled Ambient within acceptable limits? Advise owner Adjust water regulating valve to the correct pressure

5 COMPRESSOR DIAGNOSTIC FLOW CHART Cube Ice Machine Page, continued From Prior Page Suction line temperature too warm? Check compressor amp draw, compare to data in manual Amps Unit has TXV Check bulb location and attachment Was Bulb OK? Replace TXV Secure TXV bulb to suction line and insulate it. Amps too low? Replace cap tube/ heat exchanger Cycle time rmal? Replace compressor

6 Cycle Times Amps Freeze Cycle Condenser 70/50 80/60 90/ phase C0322 Air Cooled C0322 Water Cooled C0330 Air Cooled C0330 Water Cooled C0522 Air Cooled C0522 Water Cooled C0522 Remote Air C0530 Air Cooled C0530 Water Cooled C0530 Remote Air C0630 Air Cooled C0630 Water Cooled C0630 Remote Air C0722 Air Cooled C0830 Air Cooled C0830 Water Cooled C0830 Remote Air C1030 Air Cooled C1030 Water Cooled C1030 Remote Air C1448 Air Cooled C1448 Water Cooled C1448 Remote Air C1848 Air Cooled C1848 Water Cooled C1848 Remote Air C2148 Water Cooled C2148 Remote Air C2648 Remote Air CME1056 Air Cooled CME1056 Water Cooled CME1056 Remote Air CME1356 Air Cooled CME1356 Water Cooled CME1356 Remote Air CME RL CME1656 Air Cooled CME1656 Water Cooled CME1656 Remote Air CME RL CME1856 Water Cooled CME2006 Remote Air CME RL CME256 Air Cooled CME256 Water Cooled

7 Cycle Times Amps Freeze Cycle Condenser 70/50 80/60 90/ phase CME306 Air Cooled CME306 Water Cooled CME456 Air Cooled CME456 Water Cooled CME456 Remote Air CME506 Air Cooled CME506 Water Cooled CME506 Remote Air CME656 Air Cooled CME656 Water Cooled CME656 Remote Air CME RL CME806 Air Cooled CME806 Water Cooled CME806 Remote Air CME RL CME RL CU0415 Air Cooled CU0515 Air Cooled CU0715 Air Cooled CU0920 Air Cooled CU1526 Air Cooled CU1526 Water Cooled CU2026 Air Cooled CU2026 Water Cooled CU3030 Air Cooled CU3030 Water Cooled CU50 Air Cooled EH RL EH RL EH RL EH222 C EH222 C EH RL EH RL EH RL EH RL SCC30 Air Cooled SCC50 Air Cooled SCE170 Air Cooled SCE170 Water Cooled SCE275 Air Cooled SCE275 Water Cooled

8 Replacement Check List Suspected Failure Checked by Confirmed yes or no Open windings Ohmmeter after compressor cool down Broken valves System pressures, cycle time and amp draw Locked rotor / will not start Voltage check, start relay and capacitor check ise / vibration Confirming other unit parts not making noise Inefficient / Low capacity Cycle time and confirming water and hot gas valves do not leak by