icetro IM Series Technician'S Handbook Download Page 13

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Table of Contents

Thermistors

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114

efrigeration Components

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118

Compressor Electrical Diagnostics

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115

Diagnosing Start Components

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117

Headmaster

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118

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122

Charts

arvest Pressure Regulating

(HPR)

System Remote Condenser Only

Water Regulating Valve

...

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efrigerant Recover/Evacuation

...

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126

Self

Contained Model Procedure

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Remote Condenser Model Procedure

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System Contamination Clean-Up

...

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136

Determining Severity of Contamination

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Clean-Up

Procedure

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141

Replacing Pressure Controls Without

Removing Refrigerant Charge

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142

Liquid Line Filter Driers

Total System Refrigerant Charge

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143

Cycle Times

/24-Hour Ice Production/Refrigerant

Pressure Charts

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IM0350A(22) Series

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IM0

460

A(22) Series

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IM0

460

W Series

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IM055

A(22) Series

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IM055

W Series

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IM0680/0750A Series

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IM1100A/W Series

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IM1100

Series

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Summary of Contents for IM Series

Page 1: ...Revision Date 1 24 22 IM Series Air Water Remote Ice Machines Technician s Handbook ...

Page 2: ......

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Page 4: ...r manual updates This equipment contains high voltage electricity and refrigerant charge Installation and repairs are to be performed by properly trained technicians aware of the dangers of dealing with high voltage electricity and refrigerant under pressure The technician must also be certified in proper refrigerant handling and servicing procedures All lockout and tag out procedures must be foll...

Page 5: ...m the power supply e g circuit breaker or disconnect switch is provided Check all wiring connections including factory terminals before operation Connections can become loose during shipment and installation For a cord connected appliance the following must be included Do not unplug by pulling on cord To unplug grasp the plug not the cord Unplug from outlet when not in use and before servicing or ...

Page 6: ...le of supporting the combined weight of the equipment and product Additionally the equipment must be level side to side and front to back Use appropriate safety equipment during installation and servicing Two or more people are required to lift or move this appliance to prevent tipping and or injury Do not damage the refrigeration circuit when installing maintaining or servicing the unit Connect t...

Page 7: ...rocess Instead use the Forced Harvest feature explained in this handbook DANGER Do not operate equipment that has been misused abused neglected damaged or altered modified from that of original manufactured specifications This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have bee...

Page 8: ...must be in place and properly secured when operating this equipment Risk of fire shock All minimum clearances must be maintained Do not obstruct vents or openings Failure to disconnect power at the main power supply disconnect could result in serious injury or death The power switch DOES NOT disconnect all incoming power All utility connections and fixtures must be maintained in accordance with th...

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Page 10: ...ion 22 Lineset Applications 23 Remote Condenser Calculating Allowable Line Set Distance Calculating Line Set Distance 24 25 26 Tightening Remote Fittings 27 Remote Ice Machine Usage with Non Icetro Multi Circuit Condensers 28 Headmaster Valve 29 Refrigerant Charge 30 Remote Condenser Internal Volume 31 Maintenance Cleaning and Sanitizing 35 General 35 Cleaning Sanitizing Procedure 36 Preventative ...

Page 11: ... Cooled Ice Machines Water Cooled Ice Machines 43 44 Operation General 48 Ice Thickness Check 49 FND Timeouts 50 Sequence of Operation 51 Self Contained Air or Water Cooled 51 Energized Parts Chart Self Contained Models 55 Remote Condenser 57 Energized Parts Chart Remote Models 61 Error Codes 63 Troubleshooting Er_1 63 Er_3 63 Er_11 64 Er_12 64 Er_13 64 Er_14 65 Er_15 65 Er_16 65 Er_17 66 Er_18 66...

Page 12: ...ysis 84 Freeze Cycle Discharge Temp High Checklist 85 Freeze Cycle Discharge Temp Low Checklist 86 Suction Pressure High Checklist 87 Suction Pressure Low Checklist 88 Water Regulating Valve 89 Final Analysis 90 Harvest Problems 91 Electrical Components 93 Control Board PCB 93 Main Fuse 98 Water Level Control Circuitry 102 Ice Thickness Probe Initiates Harvest 107 Bin Switch 99 High Pressure HPCO ...

Page 13: ... 126 Remote Condenser Model Procedure 130 System Contamination Clean Up 136 Determining Severity of Contamination 136 Clean Up Procedure 138 141 Replacing Pressure Controls Without Removing Refrigerant Charge 142 Liquid Line Filter Driers Total System Refrigerant Charge 143 Cycle Times 24 Hour Ice Production Refrigerant Pressure Charts 145 IM0350A 22 Series 146 IM0460A 22 Series 147 IM0460W Series...

Page 14: ...Table of Contents Diagrams Wiring Diagram 155 Wiring Diagram 156 Refrigeration Schematic 159 PCB Layout 157 PCB Dip Switches 158 Self Contained Air or Water Cooled 159 Remote Condenser Models 159 13 ...

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Page 16: ... C Under Counter Old U Under Counter New D Dispenser CONDENSER TYPE A Self Contained Air Cooled W Self Contained Water Cooled R Remote Air Cooled C Dice H Half Dice F Flake N Nugget Full Model Number General Information Production Amount lbs Machine Width Blank for 30 W machines Cube Size 15 ...

Page 17: ...How to Read a Serial Number Full Serial Number 16 ...

Page 18: ...h Icetro ice machines Model Serial Number Location These numbers are required when requesting information from your local Icetro Distributor service representative or Icetro America The model and serial number are listed on the OWNER WARRANTY REGISTRATION CARD They are also listed on the MODEL SERIAL NUMBER DECAL affixed to the front and rear of the ice machine On 30 wide models the MODEL SERIAL N...

Page 19: ... 0550 AC IM 0550AH IM 0550 WC IM 0550 WH IM 0550 AC 22 IM 0550 AH 22 IM 0680 AC IM 0680AH IM 0750 AC IM 0750AH IM 1100 AC IM 1100AH IM 1100 WC IM 1100 WH IM 1100 RC IM 1100 RH Ice Machine Warranty Information For warranty information visit http www icetroamerica com service support Warranty Registration Warranty Procedure Form Warranty Claim Form Labor Allowance Form Warranty coverage begins the d...

Page 20: ...on The ice machine head section must be protected if it will be subjected to temperatures below 32 F 0 C Failure caused by exposure to freezing temperatures is not covered by the warranty ICE DEFLECTOR An ice deflector is required for all ice machines installed on a bin Installation 19 ...

Page 21: ...d 120 F 49 C Ice Making Water Inlet Water Pressure must be at least 20 psi 1 38 bar but must not exceed 80 psi 5 52 bar Condenser Water Inlet Water Pressure must be at least 20 psi 1 38 bar but must not exceed 150 psi 10 34 bar Condenser Water Inlet Water Temperature must be at least 50 F 10 C but must not exceed 90 F 32 C The location must not be near heat generating equipment or in direct sunlig...

Page 22: ...ine Heat of Rejection Air Conditioning Peak IM 0350 4600 5450 IM0460 5400 6300 IM0500 6100 6900 IM0680 IM0750 9000 13900 IM1100 18300 24500 BTU Hour Because the heat of rejection varies during the ice making cycle the figure shown is an average 21 ...

Page 23: ...e with the deflector removed Ice Machine on a Dispenser Installation Adapters are required when installing an ice machine on a dispenser 22 or 30 ice machine and is supplied by the dispenser manufacturer A thermostat kit is also required when installing an ice machine on a dispenser 22 or 30 ice machine and can be purchased from your local Icetro distributor part ITS 150KIT 22 ...

Page 24: ...ot installed according to specifications This warranty also will not apply if the refrigeration system is modified with a condenser heat reclaim device or other parts or assemblies not manufactured by Icetro America Caution Recovery locations vary by model Verify you are making the correct connections for your model to prevent accidental release of high pressure refrigerant 23 ...

Page 25: ...ine Remote Single Circuit Condenser Line Set IM 1100R IRC 1100 IRT 20R404A IRT 35R404A IRT 50R404A Line Set Discharge Return IRT 1 2 1 27 cm 3 8 375cm Air Temperature Around the Condenser Minimum Maximum 20 F 29 C 120 F 49 C 24 ...

Page 26: ...ximum rise is 35 10 7 m The maximum drop is 15 4 5 m 35 FT 10 7 M MAXIMUM DISTANCE 35 ft 10 7 m Rise The maximum distance the Condenser or Condensing Unit can be above the ice machine 15 FT 4 5 M MAXIMUM DISTANCE 15 ft 4 5 m Drop The maximum distance the Condenser or Condensing Unit can be below the ice machine 25 ...

Page 27: ...formula below Multiply by 6 6 to get the calculated drop Example A condenser located 10 feet below the ice machine has a calculated drop of 66 feet 3 Insert the measured horizontal distance into the formula below No calculation is necessary 4 Add together the calculated rise calculated drop and horizontal distance to get the total calculated distance If this total exceeds 150 45 7 m move the conde...

Page 28: ...s by hand to ensure the fittings are not cross threaded Use a backup wrench on the back of the female coupling and tighten connection until tight Mark a reference line on the female coupling and the remote condenser ice machine Using a backup wrench tighten the fittings an additional 1 6 turn Check for leaks using an electronic leak detector and or soap bubbles 27 ...

Page 29: ...t with the technical instructions provided by Icetro America Performance may vary from Sales specifications ARI certified standard ratings only apply when used with an Icetro remote condenser If the design of the condenser meets the specifications Icetro s only approval is for full warranty coverage to be extended to the Icetro manufactured part of the system Since Icetro does not test the condens...

Page 30: ...chine freeze cycle do not cycle on fan cycle control The ice maker has a condenser fan motor circuit for use with an Icetro condenser It is recommended that this circuit be used to control the condenser fan on the multi circuit condenser to assure it is on at the proper time Do not exceed the rated amps for the fan motor circuit listed on the ice machine s serial tag Internal Condenser Volume The ...

Page 31: ... system charge located in the ice maker section Remote condensers and line sets are supplied with only a vapor charge CAUTION Never add more than nameplate charge to ice machine for any application Quick Connect Fittings The ice machine and line sets come with quick connect fittings 30 ...

Page 32: ...Remote Condenser Volume cu ft Pressure Head Pressure Control Valve Type Charge Average Btu hr Peak Btu hr Min Max Design Burst IM 1100 R R404A 11 4625 lbs 18300 21045 0 085 0 0105 500 psig 2500 psig P N 340031800 Tollerance Remote Condenser Internal Volume 31 ...

Page 33: ...Level the ice machine Condenser is dirty Clean the condenser Water filtration is plugged if used Install a new water filter Water drains are not run separately and or are not vented Run and vent drains according to the Installation Manual Line set is improperly installed Reinstall according to the Installation Manual Reference Lineset Applications on page 23 32 ...

Page 34: ...temperature is not between 50 F 10 C and 90 F 32 C If too hot check the hot water line check valves in other store equipment Water filtration is plugged if used Install a new water filter Water dump valve leaking during the Freeze cycle Clean replace dump valve as needed Vent tube is not installed on water outlet drain See Installation Instructions Hoses fittings etc are leaking water Repair repla...

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Page 36: ...service company to test the water quality and recommend appropriate water treatment An extremely dirty ice machine must be taken apart for cleaning and sanitizing Nickle Safe ice machine cleaner sanitizer are the only products approved for use in Icetro ice machines Maintenance Caution Do not mix Cleaner and Sanitizer solutions together It is a violation of Federal law to use these solutions in a ...

Page 37: ...to clean the ice machine during the bi yearly cleaning sanitizing procedure This technology will also allow initiation and completion of a clean or sanitize cycle after which the ice machine will stop and the ICE OFF WASH switch returned to ICE again EXTERIOR CLEANING Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation Wipe surfaces with a da...

Page 38: ... seconds Caution Never use anything to force ice from the evaporator Damage may result Step 2 Remove all ice from the bin dispenser Step 3 Set the ICE OFF WASH switch to OFF Add the appropriate amount of cleaner into the water trough Set the ICE OFF WASH switch to WASH Water will flow into the trough until it reaches the high level probe on the water level sensor The water pump will energize and b...

Page 39: ...arts removal for your ice machine Continue with step 6 when the parts have been removed Step 6 Mix a solution of cleaner and lukewarm water Depending upon the amount of mineral buildup a larger quantity of solution may be required Use the ratio in the table below to mix enough solution to thoroughly clean all parts Solution Type Water Mixed With Cleaner 1 gal 4 L 16 oz 500 ml cleaner CAUTION Do no...

Page 40: ...e machine and bin or dispenser Use a nylon brush or cloth to thoroughly clean the following ice machine areas Side walls Base area above water trough Evaporator plastic parts including top bottom and sides Bin or dispenser Rinse all areas thoroughly with clean water SANITIZING PROCEDURE Step 9 Mix a solution of sanitizer and lukewarm water Solution Type Water Mixed With Sanitizer 3 gal 12 L 2 oz 6...

Page 41: ...he ice machine but do not move the ICE OFF WASH switch from the OFF position Add the appropriate amount of sanitizer to the trough Step 15 Set the ICE OFF WASH switch to WASH Water will flow into the through until it reaches the high level probe on the water level sensor The water pump will energize and being to circulate the water sanitizer solution mixture throughout the water circuit Step 16 Wa...

Page 42: ...ght and left side of the water trough Allow front of water trough to drop as you pull forward to disengage the rear pins C Remove the water level probe Pull the water level probe straight down to disengage Lower the water level probe until the wiring connector is visible Disconnect the wire lead from the water level probe Remove the water level probe from the ice machine 41 ...

Page 43: ... the distribution tube into two pieces Hold in the left and right tabs on the remaining piece of the distribution tube and pull it forward Proceed to page 38 Step 6 Ice Thickness Probe Water Level Probe Clean the probes using the following procedure 1 Mix a solution of ice machine cleaner and water 2 ounces of cleaner to 16 ounces of water in a container 2 Clean all probe surfaces including all pl...

Page 44: ...NES 1 Turn off the water supply 2 Remove the water from the water trough 3 Disconnect and drain the incoming ice making water line at the rear of the ice machine 4 Place ICE OFF WASH switch to ICE and wait for the water inlet and dump valves to be energized 5 Blow compressed air in both the incoming water and the drain openings in the rear of the ice machine until no more water comes out of the wa...

Page 45: ... the incoming water and drain line from the water cooled condenser 3 Remove the cover from the control box and push in the contactor so that the compressor starts The increasing refrigerant pressure will open the water regulating valve 4 Blow compressed air through the condenser until no water remains 44 ...

Page 46: ...achine diagnostics and performance customization BUTTONS Mode Button Initializes the FND and saves adjusted settings Up Button Used to navigate through the different error codes and settings Also used to increase numerical settings Down Button Used to navigate through the different error codes and settings Also used to decrease numerical settings FND Operation 45 ...

Page 47: ...ttons will change the default value Pressing the MODE button again will save the new value If there are two values for one setting pressing the MODE button will move between the two The FND will automatically turn off when it has no input for 30 seconds Forced Harvest Press UP DOWN simultaneously for 3 seconds to force the harvest cycle on the ice machine Forced Drain Press DOWN MODE simultaneousl...

Page 48: ...Flexible Numeric Display FND Functions 47 ...

Page 49: ...s do not require any adjustment To ensure proper operation always follow the Operational Checks When starting the ice machine for the first time After a prolonged out of service period After cleaning and sanitizing NOTE Routine adjustments and maintenance procedures are not covered by the warranty Operation 48 ...

Page 50: ...cubes It should be about 1 8 thick 2 If adjustment is necessary turn the ice thickness probe adjustment screw clockwise to increase bridge thickness or counterclockwise to decrease bridge thickness Set a 1 4 gap between the ice thickness probe and evaporator as a starting point Then adjust to achieve 1 8 ice thickness 3 Make sure the ice thickness probe wire and the bracket do not restrict movemen...

Page 51: ... a forced harvest Refer to page 46 for further details The maximum freeze time is 65 minutes Once the machine s freeze time exceeds 65 minutes 3 consecutive times it will trip Error Code 11 The maximum harvest time is 5 minutes Once the machine s harvest time exceeds 5 minutes 3 consecutive times it will trip Error Code 12 The maximum water fill is 5 minutes Once the machine s water fill time exce...

Page 52: ...ining water in the trough for 20 seconds The dump valve and water pump is de energized and the water inlet valve energizes a second time to allow the water trough to fill until water reaches the high level probe on the water level sensor 3 Refrigeration System Equalization and Start Up The hot gas valve energizes for 10 20 seconds to allow for pressure equalization and to reduce compressor startin...

Page 53: ...s energized throughout the freeze cycle Water Inlet Valve The water inlet valve will energize and fill the trough with additional water once the water level sensor sits below the low level probe NOTE This only happens with the 1st cycle From the 2nd cycle onward even if low water is detected no additional water is supplied Ice Thickness Probe The freeze cycle continues until water touches the ice ...

Page 54: ... The momentary opening and re closing of the bin switch terminates the harvest sequence and returns the ice machine to the freeze sequence Step 4 6 Water Purge Fill Once ice drops the hot gas valve closes and the dump valve water inlet valve and water pump are energized The dump valve closes after approximately 10 seconds while the water inlet valve and water pump remain energized The water inlet ...

Page 55: ...nd will hold it open After the water curtain is held open for 10 seconds the ice machine shuts off The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to clear the water curtain As the water curtain swings back to the closed position the bin switch closes and the ice machine restarts beginning with step 1 54 ...

Page 56: ...alve Compressor Condenser Length of Time Start Up 4 Pressure Equalization Off Off On Off Off Off 30 Seconds Off On Off Off Off Off 4 Seconds 5 Compressor Startup Off On Off Off On On 6 Seconds Freeze Sequence 6 Prechill Off Off Off On 20 Seconds On Off Off On Off Off 25 Seconds 1 Water Fill 2 Water Flush 3 Water Fill Off Off On Off Off Off 45 Seconds On On Approximate 55 ...

Page 57: ...Off Off On Until Water Contact w Ice Thickness Probe Off On Off Off On On Off On On On 12 Automatic Shut Off Off Off Off Off Off Off Until 3 Minute Delay Expires and Bin Switch Re closes On Off On Off On On 15 Seconds 7 Water Fill Off Length of Time Approximate Off Bin Switch Activation 9 Harvest 10 Water Flush 5 Seconds On Off On Off On 11 Water Fill 45 Seconds On On On 56 ...

Page 58: ...e dump valve and water pump are then energized to discard the remaining water in the trough for 20 seconds The dump valve and water pump is de energized and the water inlet valve energizes a second time to allow the water trough to fill until water reaches the high level probe on the water level sensor 2 Refrigeration System Equalization and Start Up The hot gas valve and harvest pressure regulati...

Page 59: ...s energized throughout the freeze cycle Water Inlet Valve The water inlet valve will energize and fill the trough with additional water once the water level sensor sits below the low level probe NOTE This only happens with the 1st cycle From the 2nd cycle onward even if low water is detected no additional water is supplied Ice Thickness Probe The freeze cycle continues until water touches the ice ...

Page 60: ...switch The momentary opening and re closing of the bin switch terminates the harvest sequence and returns the ice machine to the freeze sequence Step 4 6 Water Purge Fill Once ice drops the hot gas valve HPR solenoid close and the dump valve water inlet valve and water pump are energized The dump valve closes after approximately 10 seconds while the water inlet valve and water pump remain energize...

Page 61: ...nd will hold it open After the water curtain is held open for 10 seconds the ice machine shuts off The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to clear the water curtain As the water curtain swings back to the closed position the bin switch closes and the ice machine restarts beginning with step 1 60 ...

Page 62: ...n Off Off Off Off 4 Seconds 5 Compressor Startup Off On Off Off On On 6 Seconds Freeze Sequence 6 Prechill Off Off Off On 20 Seconds On Off Off On Off Off 25 Seconds 1 Water Fill 2 Water Flush 3 Water Fill Off Off On Off Off Off 45 Seconds On On Approximate Remote Air Cooled Condenser Models Energized Parts Chart Retmote Liquid Line Off Off On On Off Off Solenoid Off On On Off Off Off HPR Solenoid...

Page 63: ...ess Probe Off On Off Off On On Off On On On 12 Automatic Shut Off Off Off Off Off Off Off Until 3 Minute Delay Expires and Bin Switch Re closes On Off On Off On On 15 Seconds 7 Water Fill Off Length of Time Approximate Off Bin Switch Activation 9 Harvest 10 Water Flush 5 Seconds On Off On Off On 11 Water Fill 45 Seconds On On On On Off On Off On On Liquid Line Solenoid Condenser Retmote Off On Off...

Page 64: ... cycles if any required to stop the ice machine varies for each safety limit Note Error Codes willbe cleared from the FND if the ICE OFF WASH switch is moved to the OFF position or the machine s power is disconnected Error Code 1 If the evaporator temperature is 32 F or higher after 30 minutes in the freeze cycle the ice machine stops and displays Er_1 on the FND Error Code 3 If the evaporator tem...

Page 65: ...s the machine will stop and display Er_11 Error Code 12 If curtain switch is not detected 5 minutes into the harvest cycle 3 consecutive times the machine will stop and display Er_12 Error Code 13 If the high pressure switch opens the machine will stop and display Er_13 and close when the pressure drops 64 ...

Page 66: ...ing to re start every hour Error Code 16 If water level sensor detects water at the high level probe at the end of a freeze cycle the machine will stop and display Er_16 The machine will resume operation if the problem is resolved after automatically attempting to re sart every hour Error Code 14 If high pressure switch opens 3 consecutive times the machine will stop and display Er_14 Water cooled...

Page 67: ..._17 WATER COOLED ONLY Error Code 18 If dump valve is energized but the water level sensor does not reach low level probe within 5 minutes the machine will stop and display Er_18 Error Code 17 If excessive cooling is detected when the machine is FULL the machine will continue to run but display Er_17 WATER COOLED ONLY 66 ...

Page 68: ...ms listed ERROR CODE 1 If the evaporator temperature is 32 F or higher after 30 minutes in the freeze cycle the ice machine stops and displays Er_1 on the FND Possible cause checklist Refrigeration System Overcharged too much refrigerant TXV flooding the evaporator Hot gas valve leaking by Headmaster stuck in bypass REMOTE ONLY Electrical System Suction line thermistor open or shorted Defective fa...

Page 69: ...ist Refrigeration System Overcharged too much refrigerant TXV flooding the evaporator Hot gas valve leaking by Headmaster stuck in bypass REMOTE ONLY Electrical System Suction line thermistor open or shorted Defective fan cycling control Air System Improper Air Ventilation Air filter or condenser needs cleaning Condenser discharge air recirculation Water System Water inlet valve leaking by Water r...

Page 70: ...ossible cause checklist Refrigeration System Undercharged system too little refrigerant TXV starving the evaporator Hot gas valve leaking by Electrical System Ice thickness probe not adjusted properly or faulty Water System Insufficient water supply Insufficient water pressure Water level sensor improperly installed or giving a false reading Water pump not running Water distribution tube scaled up...

Page 71: ...cted 5 minutes into the harvest cycle 3 consecutive times the machine will stop and display Er_12 Possible cause checklist Electrical System Faulty curtain sensor Magnet no longer attached to the curtain Ice thickness sensor not adjusted properly faulty or needs cleaning Refrigeration System Hot gas valve not opening 70 ...

Page 72: ...eration System Overcharged system too much refrigerant Hot gas valve leaking by Headmaster stuck in bypass REMOTE ONLY Improper air ventilation Air filter or condenser needs cleaning Condenser blocked Condenser discharge air recirculation Condenser fan motor failure Condenser fan blade broken Water System WATER COOLED ONLY Insufficient water supply Insufficient water pressure Water regulator restr...

Page 73: ...se checklist Refrigeration System Overcharged system too much refrigerant Hot gas valve leaking by Headmaster stuck in bypass REMOTE ONLY Improper air ventilation Air filter or condenser needs cleaning Condenser blocked Condenser discharge air recirculation Condenser fan motor failure Condenser fan blade broken Water System WATER COOLED ONLY Insufficient water supply Insufficient water pressure Wa...

Page 74: ...play Er_15 The machine will resume operation if the problem is resolved after automatically attempting to re start every hour Possible cause checklist Water System Insufficient water supply Insufficient water pressure Water inlet valve stuck closed or needs cleaning Water inlet valve has no power or has shorted solenoid Water filter needs to be changed Water level sensor faulty or needs cleaning D...

Page 75: ...he high level probe at the end of a freeze cycle the machine will stop and display Er_16 The machine will resume operation if the problem is resolved after automatically attempting to re sart every hour Possible cause checklist Water System Water level sensor faulty or in need of cleaning Water inlet valve suck open Faulty PCB 74 ...

Page 76: ...he machine is FULL or OFF the machine will continue to run but display Er_17 Possible cause checklist Water System Water regulating valve is faulty or stuck open Liquid line thermistor is open or shorted NOTE Temporarily disconnecting the thermistor from the PCB will allow the machine to continue to make ice even if the error continues to occur 75 ...

Page 77: ...r does not reach low level probe within 5 minutes the machine will stop and display Er_18 Possible cause checklist Water System Dump valve faulty or in need of cleaning Dump valve has no power or has shorted solenoid Machine drain line is clogged with scale Water level sensor faulty or out of place Water pump faulty or in need of cleaning 76 ...

Page 78: ..._ Air temp around ice machine ____ Water temp entering sump trough ____ 2 Refer to the appropriate spec sheet and use the operating conditions determined in step 1 to find published 24 Hour Ice Production _____ 3 Perform an ice production check using the formula below 1 Freeze Time Harvest Time Total Cycle Time 2 1440 Minutes in 24 Hrs Total Cycle Time Cycles per Day 3 x Weight of One Harvest Cycl...

Page 79: ...hart are considered normal If they match closely determine if Another ice machine is required More storage capacity is required Relocating the existing equipment to lower the load conditions is required Contact the local Icetro Distributor for information on available options and accessories 78 ...

Page 80: ...g on the inlet of the evaporator than on the outlet At the end of the Freeze cycle ice formation at the outlet will be close to or just a bit thinner than ice formation at the inlet The dimples in the cubes at the outlet of the evaporator may be more pronounced than those on the inlet This is normal It is normal for ice thickness to vary up to 1 16 across the surface of the evaporator The ice brid...

Page 81: ...he evaporator reaches 1 8 in to initiate a harvest but there is no ice formation at all on the inlet of the evaporator 4 No Ice Formation The ice machine operates for an extended period but there is no ice formation at all on the evaporator Evaporator Tubing Routing Routing of the tubing on the back of the evaporator determines the ice fill pattern failure mode The evaporator outlet tubing does no...

Page 82: ...uld be a sign that the machine is overcharged or that the TXV is flooding the evaporator with refrigerant To test the TXV remove the sensing bulb from the suction line just after the evaporator outlet While watching the low side on the manifold gauge set hold the bulb tightly in you hand and watch to see if the low side pressure begins to rise indicating more refrigerant is entering the evaporator...

Page 83: ... minutes into the freeze cycle 2 Feel the inlet and outlet of the hot gas valve Important Sometimes feeling the hot gas valve outlet or across the hot gas valve itself will not work for this comparison The hot gas valve outlet is on the suction side cool refrigerant It may be cool enough to touch even if the valve is leaking 3 Feel the compressor discharge line 4 Compare the temperature of the inl...

Page 84: ...inlet of the hot gas valve is hot and approaches the temperature of a hot compressor discharge line Hot Hot Leaking Harvest Valve The hot gas valve inlet did not cool down during the freeze cycle due to continual leakage of compressor discharge gas through the valve Both the inlet of the hot gas valve and the compressor discharge line are cool enough to touch Cool Cool Harvest Valve Not Leaking Th...

Page 85: ...mbient air temperatures affect the discharge line temperature Higher ambient air temperatures at the condenser and or higher inlet water temperature higher discharge line temperatures at the compressor Lower ambient air temperatures at the condenser and or lower supply water temperature lower discharge line temperatures at the compressor Regardless of ambient and water temperatures the freeze cycl...

Page 86: ...rculation Defective fan cycling control Defective fan motor Defective headmaster valve Remote Water Condenser Low water pressure 20 psig 138 kPa min High inlet water temperature 90 F 32 C max Dirty condenser Dirty Defective water regulating valve Water regulating valve out of adjustment Other Overcharged Non condensable air in system Wrong type of refrigerant Non Icetro components in system High s...

Page 87: ... Defective headmaster valve won t bypass Headmaster Valve on page 118 Defective fan cycle control stuck closed Fan Cycle Control on page 113 Water Cooled Condensers Water Regulating Valve out of adjustment Water Regulating Valve Defective Other Undercharged Wrong type of refrigerant Non Icetro components in system Liquid line component restricted 86 ...

Page 88: ...ng suction pressure refer to Freeze Cycle Discharge Pressure High Checklist on page 85 Improper Refrigerant Charge Overcharged also see Freeze Cycle Discharge Pressure High Checklist on page 85 Wrong type of refrigerant Non condensables in system Components Hot Gas valve leaking HPR solenoid valve leaking TXV flooding Defective compressor Other Non Icetro components in system 87 ...

Page 89: ...de refer to Freeze Cycle Discharge Pressure Low Checklist on page 86 Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non Icetro components in system Improper water supply over evaporator refer to Water System Checklist on page 33 Restricted plugged liquid line drier Restricted plugged tubing in suction side or liquid line of refrigeration system TXV starving 88 ...

Page 90: ...alve Discharge pressure extremely high Liquid line entering receiver feels hot Water regulating valve incorrectly set or not opening Insufficient water volume undersized kinked lines mineral or scale buildup in lines Verify Head Pressure Control Valve operation before changing water regulating valve Discharge pressure low Liquid line entering receiver feels warm to hot Ice machine low on charge Ve...

Page 91: ...achine is low on charge Do not add charge to remote models The symptoms of a remote low on charge will result in error code 11 in cool ambient temperatures 2 Find the refrigerant leak The ice machine must operate with the nameplate charge If the leak cannot be found proper refrigerant procedures must still be followed Change the liquid line drier Then evacuate and weigh in the proper charge 3 If t...

Page 92: ...nd of the harvest cycle Ice is difficult to remove from the evaporator by hand Once removed the back of the cubes are square and show no signs of melting This indicates a refrigeration problem The source of the problem could be in the freeze or harvest cycle Symptom 2 Melted sheet of cubes at the end of the harvest cycle Ice can be removed rather easily by hand The back of the cubes are misshapen ...

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Page 94: ...e Each major component has a white relay above it s terminal connection on the PCB Above that relay is a green light that will illuminate anytime power is being sent to that component This along with the sequence of operation makes troubleshooting a breeze for the service technician as a simple visual check to the PCB will indicate whether or not a specific component should be operating STANDBY MO...

Page 95: ...Water inlet valve yellow energized for water fill Water pump white dump valve black energized for water flush CONTROL BOARD PCB Cont FREEZE MODE Sequence of Operation 94 ...

Page 96: ...Water inlet valve yellow energized for 2nd water fill Hot gas valve red energized to equalize pressure CONTROL BOARD PCB Cont FREEZE MODE Sequence of Operation 95 ...

Page 97: ...or brown condenser blue energized during pre chill Compressor brown condenser blue water pump white energized to circulate freeze water to evaporator CONTROL BOARD PCB Cont FREEZE MODE Sequence of Operation 96 ...

Page 98: ...Compressor brown condenser blue hot gas valve red energized for harvest CONTROL BOARD PCB Cont HARVEST MODE Sequence of Operation 97 ...

Page 99: ...oving the control board fuse or turning the ICE OFF WASH switch to OFF will not remove the power supplied to the control board CHECK PROCEDURE 1 If the power LED light is energized on the front panel of the ice machine the fuse is good Warning Disconnect electrical power to the entire ice machine before proceeding 2 Remove the fuse Check for continuity across the fuse with an ohmmeter Reading Resu...

Page 100: ...he ice machine remains off until enough ice is removed from the storage bin to allow the sheet of cubes to drop clear of the water curtain As the water curtain swings back to the operating position the bin switch closes and the ice machine restarts providing the 3 minute delay has expired Important The water curtain must be in place bin switch closed to start ice making SPECIFICATIONS The bin swit...

Page 101: ...cle and the display indicates Full Bin Bin Switch Fails Closed If running error code 12 Er_12 is displayed on the FND indicating a long harvest Machine may be off on error code 12 The harvest cycle continues after ice opens and closes the water curtain harvest cycle is about 1 5 minutes 100 ...

Page 102: ...ain switch remains closed and FULL LED light remains on Go to step 3 C Curtain switch remains open and FULL LED light remains off Go to step 3 3 Disconnect bin switch wire from control board 4 Jumper control board bin switch wire to ground and observe the FULL LED light A Curtain switch closes FULL LED light de energizes and ice machine starts Replace bin switch B Curtain switch remains open and F...

Page 103: ...obe is set to maintain the proper water level above the water pump housing The water fill time is adjustable page 47 If the water level is incorrect check the water level probe position Reposition or clean the probe as necessary Water Inlet Valve Safety Shut Off In the event of a water level probe failure this feature limits the maximum amount of time the water inlet valve can remain open Regardle...

Page 104: ...al freeze cycle but not after the first cycle has finished Maximum fill time is 5 minutes The water inlet valve energizes in the Prechill cycle and will de energize if water touches the high level probe in most instances the water trough can t fill completely in the prechill cycle and the water inlet valve will remain energized into the freeze cycle The water inlet valve will remain energized unti...

Page 105: ...level sensor mounting and verify secure wiring connections at the sensor and control board WATER TROUGH NOT FILLING DURING THE FREEZE CYCLE Step 1 Verify that the water supply is on and the water pressure is not below 20 psig Step 2 Verify that the correct voltage is supplied to the machine Step 3 Verify that power is being sent to the water inlet valve Step 4 If the water supply and power both ch...

Page 106: ...Testing the water level sensor Before S N Starting With VC 105 ...

Page 107: ...h To test the float switch simply check for continuity between the to wires found in the harness connector When the float is in the down position the switch is closed When the float is in the up position the switch is open If the float switch tests good check the wiring harness for continuity If the float switch and the harness test good the problem is with the control board 106 ...

Page 108: ...dge is thick enough to allow water to touch the probe which signals the control board to start a harvest cycle SPECIFICATIONS Maximum Freeze Time The maximum freeze time is 65 minutes at which time the control board automatically initiates a harvest sequence NOTE Do not clean ice thickness probe in a dishwasher 107 ...

Page 109: ...connecting the cubes It should be about 1 8 in 3 mm thick 2 If adjustment is necessary turn the ice thickness probe adjustment screw clockwise to increase bridge thickness or counterclockwise to decrease bridge thickness Set a 1 4 gap between the ice thickness probe and evaporator as a starting point Then adjust to achieve 1 8 ice thickness 3 Make sure the ice thickness probe wire and the bracket ...

Page 110: ...present Use the FORCE HARVEST function on the FND if necessary 2 Turn the ICE OFF WASH switch to the OFF position 3 Disconnect power to the ice machine at the main disconnect 4 Inspect the ice thickness probe for physical damage and or scale buildup Clean if necessary 5 Verify the ice thickness probe gap is approximately 1 4 3 8 See Ice Thickness Check on page 108 6 Make sure the ice thickness pro...

Page 111: ...abinet ground If after 5 seconds the machine goes into harvest replace the probe If the machine continues in the freeze cycle the control board is causing the malfunction NOTE If you suspect a defective probe check the wire harness between the ice thickness probe control board for continuity before replacing 110 ...

Page 112: ...ressure SPECIFICATIONS Specifications Cut Out Cut In Automatic Reset SYMPTOM Opening the HPCO will cause machine operation to stop The ice machine will restart once the HPCO closes If the HPCO is opens 3 consecutive times the machine operation will stop and the FND will display error code 14 Er_14 NOTE Water cooled machines will attempt to restart every hour 355 psig 426 psig 111 ...

Page 113: ...oltage present HPCO switch has reset and closed B No line voltage present HPCO switch is open Verify pressure If the HPCO is opening at a pressure significantly lower or higher than the control setting of 426 psig replace the HPCO If the HPCO is open at a pressure that is above cut in find root cause problem Fan motor dirty condenser refrigeration system issue etc The ice machine will go to an ini...

Page 114: ... discharge pressure SPECIFICATIONS CHECK PROCEDURE 1 Verify fan motor windings are not open or grounded and fan spins freely 2 Connect manifold gauges to ice machine 3 Hook voltmeter in parallel across the fan cycle control leaving wires attached 4 Refer to chart below FCC Setpoint Reading Should Be Fan Should Be Above Cut In 0 Volts Running Below Cut Out Line Voltage Off 113 ...

Page 115: ... probe clamp check the temperature of the line that the thermistor is attached to after 5 minutes of operation and compare the reading with that displayed on the FND for the thermistor being tested The two temperature readings should be similar 5 To obtain the thermistor temperature reading press the MODE button on the FND and cycle through the available settings until you reach the one for the de...

Page 116: ...sor terminals 2 The resistance values between C and S and between C and R when added together should equal the resistance value between S and R 3 If the overload is open there will be a resistance reading between S and R and open readings between C and S and between C and R Allow the compressor to cool then check the readings again THREE PHASE COMPRESSORS 1 Disconnect power and remove the wires fr...

Page 117: ...compare it to the LRA rating on the machine s data plate The two likely causes of this are a defective starting component or a mechanically seized compressor To determine which you have 1 Install high and low side gauges 2 Try to start the compressor 3 Watch the pressures closely A If the pressures do not move the compressor is seized Replace the compressor B If the pressures move the compressor i...

Page 118: ...Relay The relay has a set of contacts that connect and disconnect the start capacitor from the compressor start winding The contacts on the relay are normally closed start capacitor in series with the start winding The relay senses the voltage generated by the start winding and opens the contacts as the compressor motor starts The contacts remain open until the compressor is de energized RELAY OPE...

Page 119: ...ils whenever the outdoor temperature drops Refrigerant loss and ambient temperature are directly related to each other As the ambient temperature drops more refrigerant is stored in the condenser When the refrigerant charge and ambient temperature create an undercharge of refrigerant in the freeze cycle the receiver dip tube will lose it s liquid seal Without liquid refrigerant to the TXV the ice ...

Page 120: ...iver Harvest Cycle Operation Remote Condenser Models The headmaster valve cycles into full bypass due to the pressure drop when the hot gas valve opens Refrigerant flows from the compressor to the evaporator through the hot gas valve and the headmaster valve is out of the circuit Diagnostics FREEZE CYCLE REMOTE CONDENSER 1 Determine if the coil is clean 2 Determine the air temperature entering the...

Page 121: ...alfunctions Lower ambient conditions can be simulated by rinsing the condenser with cool water during the freeze cycle Condition Probable Cause Corrective Measure Discharge Pressure High Liquid Line Temperature Hot Valve stuck in bypass Replace valve Discharge Pressure Low Liquid Line Temperature Cold Valve not bypassing Replace valve Discharge Pressure Low Liquid Line Temperature Hot Ice Machine ...

Page 122: ...e Harvest cycle suction pressure is low Harvest cycle discharge pressure is low Liquid line entering receiver feels warm to hot in the freeze cycle Overcharge Symptoms Error code 12 Er_12 displayed on the FND indicating Long Harvest has taken place Harvest cycle discharge pressure is normal Freeze cycle time suction and discharge pressure are normal and the ice machine will not harvest The sheet o...

Page 123: ... The HPR system is not used during the freeze cycle The HPR solenoid is closed de energized preventing refrigerant flow into the HPR valve HARVEST CYCLE During the harvest cycle the check valve in the discharge line prevents refrigerant in the remote condenser and receiver from back feeding into the evaporator and condensing to liquid The HPR solenoid is opened energized during the harvest cycle a...

Page 124: ... is normal If liquid line is cooler than body temperature refer to Headmaster Valve on page 118 2 Ice fill pattern normal 3 Freeze time normal Shorter freeze cycles Refer to Headmaster Valve on page 118 Longer freeze cycles Refer to Water System Checklist on page 33 then refer to Analyzing Why an Error Code Stopped the Ice Machine on page 68 4 Harvest time is longer than normal and FND indicates e...

Page 125: ...cle times 7 Freeze cycle Head Pressure is in the range indicated in the cycle time 24 hour ice production and operational pressure chart If the head pressure is low refer to Freeze Cycle Discharge Pressure Low Checklist on page 86 8 Freeze cycle Suction Pressure normal Refer topages 87 88 if suction pressure is high or low 9 Harvest cycle suction and discharge pressures are lower than indicated in...

Page 126: ...ns 3 Adjust valve to increase or decrease discharge pressure 4 Determine the temperature of the liquid line entering the receiver by feeling it This line is normally warm body temperature Problem Freeze Cycle Valve not maintaining discharge pressure Valve incorrectly set dirty or defective Adjust clean or replace valve Discharge pressure extremely high Liquid line entering receiver feels hot Water...

Page 127: ...refrigerant is the sole responsibility of the servicing company IMPORTANT Replace the liquid line drier after recovering the refrigerant and before evacuating and recharging Use only an Icetro O E M liquid line filter drier to prevent voiding the warranty Connections Manifold gauge sets must utilize low loss fittings to comply with U S Government rules and regulations Make these connections Suctio...

Page 128: ...IT CLOSED OPEN LOW SIDE ACCESS VALVE HIGH SIDE ACCESS VALVE OPEN RECOVERY EVACUATION CONNECTIONS 3 Perform recovery or evacuation A Recovery Operate the recovery unit as directed by the manufacturer s instructions B Evacuation prior to recharging Pull the system down to 500 microns Turn off the pump and perform a standing vacuum leak check to ensure the micron level does not rise beyond 1 000 micr...

Page 129: ...n all Icetro ice machines Use a scale to ensure the proper charge is installed 1 Be sure the ice machine is off MANIFOLD SET CLOSED SCALE VACUUM PUMP RECOVERY UNIT OPEN CLOSED LOW SIDE ACCESS VALVE HIGH SIDE ACCESS VALVE OPEN REFRIGERANT CYLINDER CHARGING CONNECTIONS 128 ...

Page 130: ...gauges must be removed properly to ensure that no refrigerant contamination or loss occurs 9 Make sure that all of the vapor in the charging hoses is drawn into the ice machine before disconnecting the charging hoses A Run the ice machine in freeze cycle B Remove the high side low loss fitting from the access valve C Open the high and low side valves on the manifold gauge set Any refrigerant in th...

Page 131: ...IMPORTANT Icetro America assumes no responsibility for the use of contaminated refrigerant Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company IMPORTANT Replace the liquid line drier after recovering the refrigerant and before evacuating and recharging Use only an Icetro O E M liquid line filter drier to prevent voiding the warranty 130 ...

Page 132: ...the liquid line solenoid Access Schraeder valve on the discharge line quick connect fitting located on the outside of the compressor evaporator compartment This connection evacuates the condenser Without it the magnetic check valves would close when the pressure drops during evacuation preventing complete evacuation of the condenser NOTE Icetro recommends using an access valve core removal and ins...

Page 133: ...side on the manifold gauge set 4 Perform recovery or evacuation A Recovery Operate the recovery unit as directed by the manufacturer s instructions B Evacuation prior to recharging Pull the system down to 500 microns Turn off the pump and perform a standing vacuum leak check to ensure the micron level does not rise beyond 1 000 microns within 5 minutes 5 Follow the Charging Procedures 132 ...

Page 134: ...SERVICE REMOTE RECOVERY EVACUATION CONNECTIONS 133 ...

Page 135: ...w side until the machine is fully charged NOTE If an access valve core removal and installation tool is used on any of the Schrader valves reinstall the cores before disconnecting the access tool and hose 4 Remove the high side low loss fitting from the access valve 5 Open the high and low side valves on the manifold gauge set Any refrigerant in the lines will be pulled into the low side of the sy...

Page 136: ... VACUUM PUMP ACCESS VALVE RECEIVER MANIFOLD SET OPEN DRIER SOLENOID LINE VALVE REGULATING PRESSURE HARVEST LIQUID ACCESS VALVE CHECK VALVE TEE OPEN HIGH SIDE ACCESS VALVE LOW SIDE COMPRESSOR HARVEST PRESSURE SOLENOID VALVE VALVE EXPANSION VALVE CHECK STRAINER VALVE SOLENOID HEAT EXCHANGER EVAPORATOR REMOTE CHARGING CONNECTIONS 135 ...

Page 137: ...ous moisture or an acrid odor in the refrigerant indicates contamination If either condition is found or if contamination is suspected use a Total Test Kit from Totaline or a similar diagnostic tool These devices sample refrigerant eliminating the need to take an oil sample Follow the manufacturer s directions If a refrigerant test kit indicates harmful levels of contamination or if a test kit is ...

Page 138: ...on Leak in water cooled condenser No burnout deposits in open compressor lines Mild contamination cleanup procedure Mild Compressor Burnout symptoms Oil appears clean but smells acrid Refrigeration test kit or acid oil test shows harmful acid content No burnout deposits in open compressor lines Mild contamination cleanup procedure Severe Compressor Burnout symptoms Oil is discolored acidic and sme...

Page 139: ...e system Pressurize to a minimum of 5 psig 35 kPa 35 bar B Pull vacuum to 500 microns Break the vacuum with dry nitrogen and sweep the system Pressurize to a minimum of 5 psig 35 kPa 35 bar C Change the vacuum pump oil D Pull vacuum to 500 microns Run the vacuum pump for an additional 1 2 hour on self contained models 1 hour on remotes NOTE You may perform a standing vacuum test to make a prelimin...

Page 140: ...through the open system with dry nitrogen IMPORTANT Refrigerant sweeps are not recommended as they release CFCs into the atmosphere 5 Install a new compressor and new start components 6 Install a suction line filter drier with acid and moisture removal capability Place the filter drier as close to the compressor as possible 7 Install an access valve at the inlet of the suction line drier 8 Install...

Page 141: ...orm a standing vacuum test to make a preliminary leak check You should use an electronic leak detector after system charging to be sure there are no leaks 10 Charge the system with the proper refrigerant to the nameplate charge 11 Operate the ice machine for one hour Then check the pressure drop across the suction line filter drier A If the pressure drop is less than 1 psig 7 kPa 7 bar the filter ...

Page 142: ...tructions supplied with the pinch off tool Position the pinch off tool around the tubing as far from the pressure control as feasible See the figure on next page Clamp down on the tubing until the pinch off is complete Warning Do not unsolder a defective component Cut it out of the system Do not remove the pinch off tool until the new component is securely in place 3 Cut the tubing of the defectiv...

Page 143: ...sed on Icetro ice machines are manufactured to Icetro specifications The size of the filter drier is important The refrigerant charge is critical Using an improperly sized filter drier will cause the ice machine to be improperly charged with refrigerant IMPORTANT Driers are covered as a warranty part The drier must be replaced any time the system is opened for repairs 142 ...

Page 144: ...information listed on these pages Model Air Cooled Water Cooled Remote Additional Refrigerant for Line Sets 51 100 Maximum System Charge IM0350 26 5 oz NA NA NA IM0350 22 25 7 oz NA NA NA IM0460 24 7 oz 19 4 oz NA NA NA IM0460 22 25 4 oz IM0550 24 7 oz 22 9 oz NA NA NA IM0550 22 28 2 oz IM0680 41 3 oz IM0750 41 3 oz IM1100 60 3 oz 39 9 oz 183 4 oz 32 oz 215 4 oz NA NA NA NA NA NA NA NA NA NA NA NA...

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Page 146: ...ature Ice production checks that are within 10 of the chart are considered normal This is due to variances in water and air temperature Actual temperatures will seldom match the chart exactly Zero out manifold gauge set before obtaining pressure readings to avoid misdiagnosis Discharge and suction pressure are highest at the beginning of the cycle Suction pressure will drop throughout the cycle Ve...

Page 147: ...IM0350 SERIES IM0350A 22 Self Contained Air Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 146 ...

Page 148: ...IM0460 SERIES IM0460A 22 Self Contained Air Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 147 ...

Page 149: ...IM0460 SERIES IM0460W Self Contained Water Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 148 ...

Page 150: ...IM0550 SERIES IM0550A 22 Self Contained Air Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 149 ...

Page 151: ...IM0550 SERIES IM0550W Self Contained Water Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 150 ...

Page 152: ...IM0680 0750 SERIES IM0680 0750A Self Contained Air Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 151 ...

Page 153: ...IM1100 SERIES IM1100A W Self Contained Air and Water Cooled Models Characteristics vary depending on operating conditions CYCLE TIMES 152 ...

Page 154: ...IM1100 SERIES IM1100R Remote Air Cooled Model Characteristics vary depending on operating conditions CYCLE TIMES 153 ...

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Page 156: ...ains an electrical wiring diagram Warning Always disconnect power before working on electrical circuitry Not all components are included on every machine Please verify your model number to when using the diagram on the next page Diagrams 155 ...

Page 157: ...Wiring Diagram 156 ...

Page 158: ...PCB Layout 157 ...

Page 159: ...PCB Dip Switches 158 ...

Page 160: ...hermistor S L Thermistor Evap Inlet Thermistor REMOTE CONDENSER MODELS RECEIVER ACCESS RECEIVER VALVE DRIER CHECK VALVE HEAD PRESSURE CONTROL VALVE H P R SOLENOID VALVE HARVEST PRESSURE REGULATING VALVE CHECK VALVE STRAINER COMPRESSOR HOT GAS SOLENOID VALVE CONDENSER REMOTE EXPANSION VALVE EVAPORATOR HEAT EXCHANGER SOLENOID LINE LIQUID VALVE X X T2 Thermistor S L Thermistor L L Thermistor Evap Inl...

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Page 166: ...OADWAY ANAHEIM CA 92802 714 215 4864 WWW ICETROAMERICA COM 2022 Icetro America except where explicitly stated otherwise All rights reserved Continuing product improvement may necessitate change of specifications without notice ...

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icetro IM Series, Technician'S Handbook

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