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Removal and Replacement: Water Level Sensor

1. Remove front panel.
2. Push and hold the OFF button. Release it when

the machine stops.
3. Trace wire harness from water level sensor to

the Controller (#2). Unplug the harness from the

controller.
4. Lift the pump and mounting plate up enough to

remove the float from the stem.
5. Remove two screws holding the sensor to the

pump bracket and lift the sensor up and out of the

machine.
6. Reverse to reassemble.
Note: Single evaporator models have a different

float stem from the double evaporator machines.

Do not mix the two. The color of the float stem is

supposed to match the color of the reservoir

overflow standpipe (the standpipe is also different

between single and double evaporator machines).
Discharge Line Temperature Sensor
1. Remove front panel, push and release the Off

button.
2. Remove top and left side panels.
3. Locate discharge line sensor. It is attached to

the discharge line of the compressor, 6" from the

compressor discharge port.
4. Un-snap the clip holding the sensor to the

discharge line.

5. Trace the sensor wires back to the controller,

they are plugged into #5 with the water

temperature sensor, and must be replaced with it.
6. Reverse to replace, be sure that the discharge

line sensor is 6" up from the compressor discharge

port. The discharge line sensor is marked with

yellow tape.
Note: Route wires so they do NOT contact the

discharge line.

Water Temperature Sensor
Note: This sensor is replaced as a set with the

Discharge Temperature Sensor.
1. Remove front panel.
2. Push and release Off button.
3. Remove 1 plastic bolt and the reservoir cover.
4. Locate water temperature sensor (inserted into

pump discharge hose).
5. Pull out to remove.

6. Trace back to AutoIQ Controller, unplug from

#5.
7. Remove the Discharge Line temperature

sensor.

CME506R, 656R, 806R: AutoIQ Cubers

January 2000

Page 38

Water Temperature Sensor

Содержание CME506R

Страница 1: ...9 Electrical Connections KCMR230 Fan Relay Kit CME656R CME806R only page 10 Plumbing page 11 After Utility Connections page 12 Component Location and Function page 13 AutoIQ Controller page 14 Initial Start Up page 15 Adjustments page 16 Adjustments page 17 How To Operate The AutoIQ Controller page 18 How The Electronic Cuber Works page 19 Technicians Only Freeze Cycle Operational Sequence page 20...

Страница 2: ... the ice machine Scotsman reserves the right to make design changes and or improvements at any time Specifications and designs are subject to change without notice Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way including the use of any parts and or other components not specifically approved by Scotsman CME506R 656...

Страница 3: ... used during ice making a portion is designed to rinse out the water system to keep hard water scale from clogging up the machine That water rinse combined with water filters prolongs the times between needed water system cleaning Note All Scotsman CM3 models like those described in this manual feature Scotsman s AutoIQ control system and ReliaClean water system cleaning process Service Technician...

Страница 4: ...rectly onto the bin Secure the ice machine to the bin with the hardware provided two metal straps and 4 bolts After all packing materials have been removed from the ice machine lift or hoist the machine onto the bin Align the sides and back of the machine with the sides and back of the bin Secure the ice machine to the bin with the two metal straps and 4 bolts provided Cabinet Panel Removal Note T...

Страница 5: ...ain reliefs over the wrapped portion of the stacking kit wire harness Route the Stacking Kit Wire Harness from the back to the top and bottom machines thru the holes made in step 5 The harness is marked which end goes to which machine Push the strain reliefs into place from the back of the machines Follow local electrical codes for 24 volt wire In the lower unit route the wire behind the suction l...

Страница 6: ...lation Drop s Rise s Horizontal Run dd rd hd Calculated Line Length Configurations that do NOT meet these requirements must receive prior written authorization from Scotsman Do NOT Route a line set that rises then falls then rises Route a line set that falls then rises then falls Calculation Example 1 The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally 5 ...

Страница 7: ...r Note The openings in the building ceiling or wall listed in the next step are the minimum sizes recommended for passing the refrigerant lines through 2 Have the roofing contractor cut a minimum hole for the refrigerant lines of 1 3 4 Check local codes a separate hole may be required for the electrical power supply to the condenser Caution Do NOT kink the refrigerant tubing while routing it 3 Rou...

Страница 8: ...ngs together by hand until it is certain that the threads are properly engaged 4b Then using two wrenches tighten the coupling until it bottoms out or a definite increase in resistance is felt It is important that ONLY the nut on the pre charged tube be turned or the diaphragms will be torn out by the piercing knives and they will be loose in the refrigeration system Note As the couplings are tigh...

Страница 9: ...he ice maker electrical junction box Electrical connections are made in the junction box in the back of the cabinet 1 Remove the junction box cover 2 Knock out both holes for a field supplied strain relief 3 Install wires and strain reliefs per code Note Condenser fan motor wires are tagged 4 Connect to wires and secure ground wire to ground screw inside junction box All external wiring should con...

Страница 10: ... when switching Note 3 phase machines must have the same leg or line connected to L3 on BOTH ice machines contactors and if there is a wild leg it must be connected to L3 on BOTH ice machines A Before initial start up Compare the illustration of the KCMR230 terminal strip to the connections at the KCMR230 Terminals 1 and 3 must be connected to a common leg such as L1 Terminals 2 and 4 must be conn...

Страница 11: ...f the cabinet It must be vented at the back of the cabinet The ice storage bin will have a drain out the back or base depending upon the model Note Scotsman HTB555 shown in this manual may be drained either out the back or the base Insulation is recommended for the ice machine reservoir and bin drains Follow all applicable codes CME506R 656R 806R AutoIQ Cubers January 2000 Page 11 Water Supply Lin...

Страница 12: ...as the correct electrical power been supplied to the machine 4 Have all the water supply connections been made 5 Have all the drain connections been made 6 Has the unit been leveled Level the unit at the water reservoir 7 Have all unpacking materials been removed 8 Is the water pressure adequate 9 Have the drain connections been checked for leaks 10 Has the bin interior been wiped clean or sanitiz...

Страница 13: ... harvest cycle The freezing compartment is fully insulated for maximum efficiency Cube Deflector The slots in the inclined deflector allows the water falling from the evaporators back into the reservoir but when ice falls during harvest the ice slides off the deflector into the bin Refrigeration Service Access Valves Only to be used by a certified technician Allows access to the refrigeration syst...

Страница 14: ... remote fan motor and water pump are ON Harvest The refrigeration and water systems are operating to harvest the ice cubes While the compressor and fan motors are on for the full cycle the water pump will be off at the beginning and the inlet water valve will switch off before the end Clean Water valve opens to fill the reservoir The Water pump starts The Clean indicator light is switched ON A man...

Страница 15: ... will open The machine will fill the reservoir and overflow it for a specified number of seconds then shut off The harvest cycle may still be in progress The Bin Full indicator light will go on and off as ice falls from the evaporators 7 Machines are shipped from the factory with the purge level set to accommodate average water conditions To achieve optimal machine performance set the purge level ...

Страница 16: ...t will be switched on and the machine will Shut Down Note The machine can be reset and restarted by pushing and releasing the Off push button switch and then pushing and releasing the freeze push button switch How to Adjust Cube Size Reference Only The adjustment is done by moving the long screw located in the floating stem at the front of the machine Note Units manufactured beginning 3 97 do not ...

Страница 17: ... may extend the Harvest cycle and reduce capacity 2 Heavy Purge is when these 4 lights are ON Freeze Harvest Clean Off Use for moderate to severe water conditions This setting may extend the Harvest cycle and reduce capacity 3 Standard Purge factory setting is when these 3 lights are ON Harvest Clean Off Use for typical water conditions 4 Moderate Purge is when these 2 lights are ON Clean Off This...

Страница 18: ... Harvest cycle 3 Clean Button Pushing and releasing this button will cause the machine to only power the water pump for circulation of ice machine cleaner After the ice machine cleaner has circulated for about 10 minutes a second push of this button will switch on the rinsing system to flush out the dissolved scale and ice machine cleaner 4 Off Button Pushing and releasing this button will switch ...

Страница 19: ...ystem is similar to that of most commercial cube ice machines Heat is removed from the water and discharged out the condenser during the freeze cycle As liquid refrigerant passes thru the Thermostatic Expansion Valve it enters the bottom of the evaporators and will form on the bottom first When cubes need to be released Harvest the Hot Gas Bypass Valve is opened and Hot discharge gas flows directl...

Страница 20: ...l goes up enough If it does not the inlet water valve will open again to fill it If after restarting the water level does not drop it is assumed that there is a water pump problem and the machine Shuts Down on a Water Error If the water level does measure up the water pump is restarted and the AutoIQ Controller then measures how long it takes to lower the water level If the water level does not fa...

Страница 21: ... cycle also produces a Refrigeration Error the machine will shut down Note Machines built up to August 1996 The last Harvest cycle before shutting off on Bin Full will be 10 minutes All CME806 and all other machines built after August 1996 have a last harvest cycle that is 4 6 minutes long Note The machine will not restart for 4 minutes after switching off on Bin Full unless the Freeze button is p...

Страница 22: ...e machine cleaner has circulated for 10 minutes push and release the Clean button This starts the rinsing process The Clean indicator light will be ON Note The rinse process flushes any residual cleaner out of the ice machine s water system 10 Continue the rinsing process for 20 minutes then push the off button to switch the machine off 11 Go to the next step to sanitize the machine or go to step ...

Страница 23: ...n that the standpipe is properly seated 10 Push and release Freeze button 11 Replace front panel To Sanitize the Ice Storage Bin 1 Remove all ice 2 Remove baffle 3 Switch ice machine OFF or wait for it to be in a cleaning cycle 4 Mix a 1 gallon solution of warm 95 115oF water and sanitizer Follow local codes for sanitizer 5 Wash or spray the entire interior of the ice storage bin with the sanitize...

Страница 24: ...though they are made of a material that is resistant to mineral build up some may be present Soak or scrub the distributors in or with a solution of Scotsman Ice Machine Cleaner and warm potable water 9 Return the water distributors to their normal installed position 9a Snap the two distributors onto the water manifold Place them on the back evaporator right end first Push the distributors far eno...

Страница 25: ...er device is restricted To Check the Inlet Water Valve Screen 1 Disconnect the electrical power 2 Shut off the water supply 3 Remove the front panel 4 Unplug the electrical connection of the inlet water valve 5 Remove the screws holding the inlet water valve to the cabinet 6 Remove outlet tube from inlet water valve 7 Rotate inlet water valve from inlet fitting and remove valve from machine 8 Exam...

Страница 26: ... up They may be wiped clean with ice machine cleaner to assist in removal of the build up Note Do NOT use abrasive materials or cleaner on the bin sensor lenses To Clean the Remote Air Cooled Condenser 1 Disconnect and lock out the electrical power 2 At the remote condenser check for loose debris on the roof remove any near the condenser 3 Check the fan blade and condenser for grease or dust build...

Страница 27: ...nit is off and Refrigeration Diagnostic Light is ON or BLINKING Low discharge or long freeze cycle If the refrigeration lite is glowing continuously there is a probable refrigeration problem Harvest problem Check refrigeration light If thelight is blinking steadily look for a harvest problem On controllers 17 1 and higher this also indicates that cubes were sensed by the bin controls Controllers 1...

Страница 28: ... water Check for leak in reservoir Low ice capacity Dirty condenser Clean condenser Recirculation of air Block air re circulation or move condenser Low refrigerant charge Check system If there is a low charge find the leak recover the refrigerant repair the leak replace the dryer evacuate and weigh in the nameplate charge Cube size set wrong Check standpipe height Unit does not shut off Bin contro...

Страница 29: ...ce AutoIQ Controller Hot Gas Valve leaks thru warm tube temperatures on both sides of valve during freeze Mechanical problem in valve Replace valve Water Inlet Valve does not open Open solenoid coil Replace valve Stuck valve Replace valve No power to valve early part of harvest Check wire connections if ok replace AutoIQ Controller Water Inlet Valve does not flow enough water Restriction in water ...

Страница 30: ...ks thru unit off on refrigeration error At the end of the freeze cycle there should be frost on the evaporator end of the hot gas inlet tube If not replace the hot gas valve Liquid and discharge lines are in contact with each other Separate and insulate them Compressor cycles on and off Low pressure pump down control opening and closing Check the low side pressure the liquid line valve must open a...

Страница 31: ...emperature changes When the PTCR is cold it connects full current to the compressor s start winding After a very short time the PTCR heats up and shuts off the current flow Under normal operation the PTCR s case is at about 180o F At that temperature the PTCR has very high resistance and will not allow current flow It must cool down to 120o F before current will pass through it again Diagnosis 1 D...

Страница 32: ...y equalized thermostatic expansion valves CME506R 656R 806R AutoIQ Cubers March 2002 Page 32 0o F condenser air 70o F indoor air 55o F water 90o F condenser air 90o F indoor air 70o F water Freeze 21 24 25 28 Harvest 1 5 2 5 1 2 0o F condenser air 70o F indoor air 55o F water 90o F condenser air 90o F indoor air 70o F water Suction End of Freeze 34 36 36 38 Suction Peak in Harvest 100 110 105 115 ...

Страница 33: ...reeze 9 10 harvest Typical Harvest Ice Weight 6 5 7 lb CME506R 656R 806R AutoIQ Cubers January 2000 Page 33 0o F condenser air 70o F indoor air 55o F water 90o F condenser air 90o F indoor air 70o F water Freeze 13 15 15 17 Harvest 3 1 30 0o F condenser air 70o F indoor air 55o F water 90o F condenser air 90o F indoor air 70o F water Suction End of Freeze 24 27 27 29 Suction Peak in Harvest 85 105...

Страница 34: ...ssor Amp single phase Freeze 13 Harvest 14 Typical Harvest Ice Weight 6 5 7 lb 70o F condenser air 70o F indoor air 50o F water 90o F condenser air 90o F indoor air 70o F water Freeze 10 12 11 30 13 Harvest 1 45 1 30 70o F condenser air 70o F indoor air 50o F water 90o F condenser air 90o F indoor air 70o F water Suction End of Freeze 19 21 21 23 Suction Peak in Harvest 100 110 115 125 Discharge 5...

Страница 35: ... and release the Freeze button 10 Replace the front panel Water Pump 1 Disconnect the electrical power 2 Remove the front panel 3 Unplug water pump from its electrical connection 4 Remove 1 plastic bolt and the reservoir cover 5 Lift water pump up and disconnect outlet tube 6 Pull float ball from float stem it is a snap fit Pull stem out 7 Locate water level sensor mounting tabs compress together ...

Страница 36: ...from machine 13 Reverse to reassemble CME506R 656R 806R AutoIQ Cubers January 2000 Page 36 Water Sensor Standpipe Note Standpipe height is critical Measured from the top of the standpipe to the top of the reservoir the distance should be 2 5 8 If not adjust it by rotating the top of the standpipe it is on threads to obtain that distance Water Level Sensor Float Stem 1 Disconnect the electrical pow...

Страница 37: ...elease the Freeze button 11 Replace the front panel Electric Eyes Bin Control These must be replaced as a set 1 Remove front panel 2 Push and release the Off button 3 Remove top panel 4 Remove left and right side panels 5 Unplug both from the Controller 3 and 4 6 Remove evaporator cover 7 Remove cube deflector 8 Push in at the wire inlets the bin controls 9 Pull both into the freezing compartment ...

Страница 38: ...ve top and left side panels 3 Locate discharge line sensor It is attached to the discharge line of the compressor 6 from the compressor discharge port 4 Un snap the clip holding the sensor to the discharge line 5 Trace the sensor wires back to the controller they are plugged into 5 with the water temperature sensor and must be replaced with it 6 Reverse to replace be sure that the discharge line s...

Страница 39: ...stem must not be open for more than 15 minutes B An electronic leak detector capable of locating HFC 134a type refrigerant must be used to locate refrigerant leaks C A nitrogen sweep is required when brazing D An HFC type liquid line dryer must be used E When evacuating use of an electronic micron gage is recommended Evacuate to 300 microns F It must be liquid charged 1 Place a drum or cylinder of...

Страница 40: ...access valves Attach the charging hose to the cylinder of R 404A Open the cylinder s valve and purge the hose to the manifold 4 Close the low side service access valve 5 Open the discharge side manifold valve and weigh in the name plate charge After the charge is weighed in wait a few minutes and re check the scale 6 If all of the refrigerant charge has not been weighed into the discharge side it ...

Страница 41: ...reset the ice machine To Manually Reset the machine 1 Remove the front panel 2 Locate the AutoIQ Controller If a red diagnostic light is glowing note which one and its blink rate Then push and release the off button 3 Push and release the Freeze button 4 The machine should begin to operate If there is a lack of water it willshut off again soon 5 Return the front panel to its normal position If the...

Страница 42: ......

Страница 43: ...ator light will be ON Note The rinse process flushes any residual cleaner out of the ice machine s water system 10 Continue the rinsing process for 20 minutes then push the off button to switch the machine off 11 Go to the next step to sanitize the machine or go to step 19 to finish the cleaning process 12 Mix 2 gallons of Sanitizer solution Follow local codes for Sanitizer Note A possible sanitiz...

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