Manitowoc QC0700 Service Manual Download Page 129

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Section 7

Refrigeration System

Part No. 80-1214-3

7-7

ANALYZING DISCHARGE PRESSURE
DURING FREEZE OR HARVEST CYCLE

Procedure

1. Determine the ice machine operating conditions:

Air temp. entering condenser

______

Air temp. around ice machine

______

Water temp. entering water reservoir

______

2. Refer to Cycle Times/24 Hour Ice Production/

Refrigeration Pressure Chart for ice machine being
checked.

Use the operating conditions determined in step 1 to
find the published normal discharge pressures.
Compare to actual discharge pressure readings.

3. Measure the actual discharge pressure.

4. Compare the actual discharge pressure (step 3) with

the published discharge pressure (step 2).

The discharge pressure is normal when the actual
pressure falls within the published pressure range for the
ice machine’s operating conditions.

Discharge Pressure High Checklist

Discharge Pressure Low Checklist

NOTE: Do not limit your diagnosis to only the items listed in the checklists.

Possible Cause

Check/Correct

Improper installation

See “Installation/Visual Inspection Checklist”

Restricted condenser air flow

High inlet air temperature
Condenser discharge air recirculation
Dirty condenser fins

Defective fan motor
Defective fan cycle control (QC700/QF800 only)

Improper refrigerant charge

Overcharged
Non-condensables in system
Wrong type of refrigerant

Other

Non-Manitowoc components in system
High side refrigerant lines/component restricted (before mid-condenser)

Defective head pressure control valve (RFC2085/RFC2385 only)

Possible Cause

Check/Correct

Improper installation

See “Installation/Visual Inspection Checklist”

Improper refrigerant charge

Undercharged

Wrong type of refrigerant

Other

Non-Manitowoc components in system

Defective head pressure control valve (RFC2085/RFC2385 only)

Defective fan cycle control (QC700/QF800 only)

Suction pressure is too low and affecting discharge pressure. Refer to
suction pressure low checklist.

No water or insufficient pressure

Starving expansion valve

Defective compressor

Moisture in refrigeration system

Revised 8/2003

Summary of Contents for QC0700

Page 1: ...Flake Chiplet Model Ice Machines Flake Models QF0400 QF0800 QF2200 QF2300 Chiplet Models QC0700 Service Manual Part Number 80 1214 3 07 03 Revised 8 2003 ...

Page 2: ... neglected damaged or altered modified from that of original manufactured specifications Warning Text in a Warning box alerts you to a potential personal injury situation Be sure to read the Warning statement before proceeding and work carefully Caution Text in a Caution box alerts you to a situation in which you could damage the ice machine Be sure to read the Caution statement before proceeding ...

Page 3: ...ensing Unit Dimensions 2 2 QF2200 QF2300 and RFC2085 RFC2385 Remote Condensing Unit 2 2 Location of Ice Machine 2 3 Ice Machine Head Section Clearance Requirements 2 3 Ice Machine Heat of Rejection 2 3 Location of Remote Condensing Unit 2 3 Condensing Unit Clearance Requirements 2 3 Leveling the Ice Storage Bin 2 4 Condenser Air Baffle 2 4 Electrical Service 2 5 General 2 5 Voltage 2 5 Fuse Circui...

Page 4: ...Line Set Rise or Drop 2 12 C Suction Line Oil Traps 2 13 Section 3 Maintenance Component Identification 3 1 Ice Machine Head Sections 3 1 Remote Condensing Units 3 3 Operational Checks 3 4 General 3 4 Water Level Check 3 4 Interior Cleaning and Sanitizing 3 5 General 3 5 Exterior Cleaning 3 5 Cleaning the Condenser 3 6 Air Cooled Condenser 3 6 Manitowoc s Cleaning Technology 3 7 Preventative Maint...

Page 5: ...tion 5 Troubleshooting Checklist 5 1 Safeguard Feature 5 2 Reset Procedure 5 2 Standby Mode 5 2 SafeGuard Indicator Lights 5 2 SafeGuard Modes 5 3 Gear Box Removal 5 7 QF400 5 7 QC700 QF800 5 7 Evaporator Removal 5 9 Section 6 Electrical System Energized Parts Charts 6 1 QF400 QC700 QF800 6 1 QF2200 6 2 QF2300 6 3 Wiring Diagram Sequence of Operation 6 4 QF400 6 4 QC700 QF800 6 10 QF2200 6 16 QF23...

Page 6: ... System Tubing Schematic 7 1 QF400 QC700 QF800 7 1 QF2200 RFC2085 7 2 QF2300 RFC2385 7 3 Refrigeration System Diagnostics 7 4 Before Beginning Service 7 5 Ice Production Quality Check 7 5 Installation Visual Inspection Checklist 7 6 Water System Checklist 7 6 SafeGuards 7 6 Analyzing Discharge Pressure During Freeze or Harvest Cycle 7 7 Analyzing Suction Pressure 7 8 Equalization Valve 7 9 Water R...

Page 7: ...rigerant Recovery Evacuation 7 15 System Contamination Clean Up 7 19 Replacing Pressure Controls Without Removing Refrigerant Charge 7 21 Filter Driers 7 23 Suction Clean Up Filter DRier 7 23 Total System Refrigerant Charges 7 23 Refrigerant Definitions 7 24 Refrigerant Re Use Policy 7 25 Revised 8 2003 ...

Page 8: ...Table of Contents continued 6 Part No 80 1214 3 Revised 8 2003 ...

Page 9: ...roducts NOTE The Manitowoc Automatic Cleaning System AuCS accessory cannot be used with Flake Chiplet Ice Machines Flake Ice Chiplet Ice Condensing Unit Undercounter Self Contained Air Cooled QF0406A NA NA Self Contained Air Cooled QF0806A QC0708A NA Self Contained Water Cooled QF0807W QC0709W NA Remote Air Cooled QF2296N NA RFC2085 QF2396N NA RFC2385 Warning PERSONAL INJURY POTENTIAL Do not opera...

Page 10: ...e 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 ice machine head section and condensing unit Both model serial numbers must be referenced to obtain warranty or service information Model Serial Number Location SV2019 MODEL SERIAL NUMBERS DECAL QF800 QC700 QF2200 QF2300 SV2047 MODEL SERIAL NUMBERS DECAL...

Page 11: ... machine s warranty coverage 1 Normal maintenance adjustments and cleaning as outlined in this manual 2 Repairs due to unauthorized modifications to the ice machine or use of non standard parts without prior written approval from Manitowoc Ice Inc 3 Damage caused by improper installation of the ice machine electrical supply water supply or drainage or damage caused by floods storms or other acts o...

Page 12: ...General Information Section 1 1 4 Part No 80 1214 3 THIS PAGE INTENTIONALLY LEFT BLANK Revised 8 2003 ...

Page 13: ...rtant Failure to follow these installation guidelines may affect warranty coverage 26 66 CM 19 48 2 CM 32 5 82 55 CM 6 15 24 CM 7 2 18 2 CM 3 03 7 7 CM 3 04 7 72 CM 1 36 3 5 CM 26 5 67 3 CM SV2050 11 13 28 3 CM 1 9 4 8 CM 2 5 1 CM 5 6 14 3 CM 11 5 29 2 CM 13 5 34 3 CM 26 5 67 3 CM SV2004 22 55 88 CM 24 5 62 23 CM 26 5 67 3 CM 5 9 15 CM 2 9 7 3 CM 3 7 6 CM 1 6 4 CM SV2003 Revised 8 2003 ...

Page 14: ...Condensing Unit Dimensions QF2200 QF2300 AND RFC2085 RFC2385 REMOTE CONDENSING UNIT SV1758 10 75 27 3 CM 14 5 36 8 CM 9 5 24 1 CM 14 5 36 8 CM 25 75 34 86 4 CM 24 13 53 7 CM 30 76 2 CM 24 5 62 23 CM 2 25 5 72 CM 23 5 67 3 CM 9 8 24 89 CM 2 8 7 12 CM 1 8 4 6 CM SV1784 4 5 11 43 CM Revised 8 2003 ...

Page 15: ...ines add an insignificant amount of load to a conditioned space Location of Remote Condensing Unit The location selected for the Remote Condensing Unit must meet the following criteria If any of these criteria are not met select another location The air temperature must be at least 20 F 28 9 C but must not exceed 120 F 49 C The location must not allow exhaust fan heat and or grease to enter the co...

Page 16: ...y is available for use in place of the legs Installation instructions are supplied with the casters Leveling Leg and Foot Condenser Air Baffle QC700 QF800 Air Cooled Ice Machines Only The air cooled baffle prevents condenser air from recirculating To install 1 Remove the back panel screws next to the condenser 2 Align the mounting holes in the air baffle with the screw holes and reinstall the scre...

Page 17: ...0 QF2300 with Remote Condensing Unit the ice machine head section and remote condensing unit are wired independent of each other A separate dedicated fuse circuit breaker must be provided for each section Circuit breakers must be H A C R rated does not apply in Canada MINIMUM CIRCUIT AMPACITY QC700 QF800 QF2200 QF2300 Only The minimum circuit ampacity is used to help select the wire size of the el...

Page 18: ... NA NA 230 1 60 NA NA NA NA NA NA NA Interconnecting wiring 115 60 1 is required between the ice machine and condensing unit to energize the contactor coil Indicates preliminary data Condensing Unit Voltage Phase Cycle Maximum Fuse Circuit Breaker Minimum Circuit Amps RFC2085 208 230 1 60 30 15 6 208 230 3 60 20 11 2 RFC2385 208 230 1 60 30 18 5 208 230 3 60 20 11 2 Indicates preliminary data For ...

Page 19: ...nform to local state and national electrical codes Though wire nuts are shown in the drawings the ice machine field wiring connections may use either wire nuts or screw terminals L1 L1 N 115V OR L2 208 230V GROUND GROUND ICE MACHINE CONNECTIONS SV1258 L1 L1 N N GROUND GROUND ICE MACHINE CONNECTIONS TO SEPARATE FUSE BREAKER DISCONNECT ALL POLES SV1191 N 115V GROUND GROUND ICE MACHINE CONNECTIONS TO...

Page 20: ...al work including wire routing and grounding must conform to local state and national electrical codes Though wire nuts are shown in the drawings the ice machine field wiring connections may use either wire nuts or screw terminals CONDENSING UNIT CONNECTIONS GROUND GROUND TO FUSE BREAKER DISCONNECT ALL LINE VOLTAGE DO NOT DISCONNECT GROUND L1 L1 L2 L2 C1 C1 GROUND GROUND CONDENSING UNIT CONNECTION...

Page 21: ...d condenser drain lines Insulate them to prevent condensation Vent the bin and ice machine drain to the atmosphere The ice machine drain requires an 18 vent Do not vent the condenser drain on water cooled models Drains must have a union or other suitable means to allow in place disconnection from the ice machine when servicing is required Insulate water inlet lines and drain lines to prevent conde...

Page 22: ...2 2 C Max 20 psi 137 9 kPA Min 80 psi 551 5 kPA Max 3 8 Female Pipe Thread 3 8 9 5 mm minimum inside diameter Condenser Water Inlet 33 F 0 6 C Min 90 F 32 2 C Max 20 psi 137 9 kPA Min 150 psi 1034 2 kPA Max 1 2 Female Pipe Thread 1 2 12 7 mm minimum inside diameter Condenser Water Drain 1 2 Female Pipe Thread 1 2 12 7 mm minimum inside diameter Bin Drain 1 2 Female Pipe Thread 1 2 12 7 mm minimum ...

Page 23: ...pressure QuietQube Ice Machine Remote Single Circuit Condenser Line Set QF2200 QF2300 RFC2085 RFC2385 RC 20 RC 30 RC 50 Line Set Suction Line Liquid Line Insulation Thickness RC 20 30 50 3 4 inch 19 1 mm 1 2 inch 12 7 mm 1 2 13mm Suction Line 1 4 7mm Liquid Line Warning Installation of a Remote Condensing Unit may require the use of special equipment for placement Trained and qualified personnel a...

Page 24: ...gth The maximum measured length the line set can be The receiver is designed to hold a charge sufficient to operate the ice machine in ambient temperatures between 20 F 28 9 C and 120 F 49 C with line set lengths of up to 100 feet 30 5 m B LINE SET RISE OR DROP 35 feet 10 7 m Rise The maximum distance the remote condensing unit can be above the ice machine 15 feet 4 5 m Drop The maximum distance t...

Page 25: ... requirement A service loop is not considered an oil trap The service loop is not included when calculating length rise or drop of the tubing run Do not use hard rigid copper for the service loop Step 3 Lengthening or Reducing Line Set Lengths When the line set required shortening or lengthening do so before connecting the line set to the ice machine head section or the remote condensing unit Cont...

Page 26: ... atmosphere is 15 minutes The line set can be routed for entry through the front or left side of the condensing unit Remove knockout for preferred location Insert supplied plastic bushings in knockout holes to prevent tubing from contacting sheet metal Use the supplied 90 elbows to route tubing Cut the tubing ends of the suction and liquid lines and braze the line sets to the condensing unit Warni...

Page 27: ...e 500 micron point If required the line set and condensing unit can be evacuated from the schrader valves located in the remote condensing unit Schrader valve core removal tools that allow for putting the cores back in without removing vacuum pump hoses must be used if evacuating from the condensing unit side Isolate the vacuum pump from the line set shut off valves and or condensing unit access p...

Page 28: ...OFF CLEAN toggle switch in the OFF position Connect power to the remote condensing unit and allow system to pump down Step 8 Insulation Requirements To prevent condensation the entire suction line including the shut off valve must be insulated All insulation must be airtight and sealed at both ends The following insulation requirements prevent condensation at 90 F 32 2 C ambient 70 Relative Humidi...

Page 29: ... over schrader valve cap and left side of valve Position the tab between the mounting bracket and rear panel C Fold insulation and hold against right hand side of valve while securing with electrical tape Seal the line set insulation to the shut off valve insulation with electrical tape PRE FORMED INSULATION SV3084 TIGHTEN VALVE CAPS TO SPECIFICATIONS SV3085 PLACE TAB BETWEEN VALVE BODY AND PANEL ...

Page 30: ...Installation Instructions Section 2 2 18 Part No 80 1214 3 THIS PAGE INTENTIONALLY LEFT BLANK Revised 8 2003 ...

Page 31: ...FILL HOLE WATER LEVEL PROBE WATER FLOAT VALVE COIL WATER INLET QUICK DISCONNECT FITTING GEARMOTOR CONDENSER AIR FILTER QUARTER TURN THUMBSCREWS POTABLE WATER DRAIN POTABLE WATER INLET SV2053 SV2044 WATER LEVEL PROBES WATER FLOAT VALVE COIL CONTROL BOX EVAPORATOR GEAR MOTOR GEAR BOX ASSEMBLY ICE OFF CLEAN TOGGLE SWITCH CONDESER FAN MOTOR WATER INLET QUICK DISCONNECT ICE CHUTE DUMP VALVE AIR COOLED ...

Page 32: ...H ICE CHUTE RETAINING CLAMP ICE CHUTE EVAPORATOR GEAT MOTOR GEAR BOX ASSEMBLY WATER LEVEL PROBES FLOAT VALVE DUMP VALVE ICE CHUTE ELBOW WATER RESERVOIR CLEANING SOLUTION FILL HOLE SV2100 HEAD PRESSURE CONTROL VALVE ELECTRICAL COMPARTMENT CONDENSER FAN MOTOR AIR CONDENSER COMPRESSOR SUCTION FILTER RFC2385 Remote Condensing Unit ...

Page 33: ...robes to maintain water contact throughout the freeze cycle The water level is factory set and normally will not require adjustment Check the water level during the freeze cycle The water level is correct if the water level indicator light is energized compressor is running and no water is entering the overflow tube Check for overflow water exiting the ice machine drain line at the floor drain If ...

Page 34: ...rts on Page 3 8 This procedure must be performed a minimum of once every six months All ice must be removed from the bin The ice machine and bin must be disassembled cleaned and sanitized The ice machine produces ice with the cleaner and sanitizer solutions All ice produced during the cleaning and sanitizing procedure must be discarded Heavily Scaled Cleaning Procedure Procedure starts on Page 3 1...

Page 35: ...o bend the condenser fins 3 Shine a flashlight through the condenser to check for dirt between the fins If dirt remains A Blow compressed air through the condenser fins from the inside Be careful not to bend the fan blades B Use a commercial condenser coil cleaner Follow the directions and cautions supplied with the cleaner 4 Straighten any bent condenser fins with a fin comb Straighten Bent Conde...

Page 36: ...Manitowoc s Cleaning Technology use the following procedure Step 1 Remove front and top covers and set the toggle switch to the OFF position Step 2 To start a cleaning cycle move the toggle switch to the CLEAN position Water will flow through the water dump valve and down the drain The flush gear motor speed dump valve and water solenoid lights will energize to indicate the ice machine is in the c...

Page 37: ... one minute or until the dump valve light de energizes Lift the front cover on the water reservoir and add the proper amount of Manitowoc Ice Machine Cleaner Step 4 The ice machine will automatically time out four flush and rinse cycles and then stop The flush light remains energized until the toggle switch is moved to the OFF position This entire cycle lasts approximately 11 minutes NOTE Periodic...

Page 38: ...arts refer to disassembly for cleaning sanitizing for procedure Step 13 Remove and discard all ice produced during the cleaning process Step 14 Reassemble ice machine Step 15 Disconnect water supply line at float valve quick disconnect by depressing stainless steel lever Step 16 Remove the top cover from water reservoir Step 17 Remove the water level probes from the top cover and with the wires at...

Page 39: ...ll parts refer to disassembly for cleaning sanitizing for procedure Step 13 Remove and discard all ice produced during the cleaning process Step 14 Reassemble ice machine Step 15 Disconnect water supply line at float valve quick disconnect by depressing stainless steel lever Step 16 Remove the top cover from water reservoir Step 17 Remove the water level probes from the top cover and with the wire...

Page 40: ... flow through the water dump valve and down the drain for 45 seconds After 45 seconds move the toggle switch to the OFF position Remove the plug from the top cover of the water reservoir Add the entire cleaner water solution and re install the plug Leave the cleaner water solution in the evaporator for a minimum of 4 hours Step 6 Move the toggle switch from OFF to ICE The cleaner water solution wi...

Page 41: ... Mix a solution of sanitizer and water 8 Soak the parts in the sanitizer water solution for 10 minutes Use the sanitizer water solution and a sponge to sanitize all removed components and the inside of the bin Do not rinse the sanitized parts 9 Install the removed parts in the ice machine 10 Turn on the water and electrical supply Warning Disconnect electric power to the ice machine at the electri...

Page 42: ... or control board QF400 QC700 QF800 QF2300 Water Reservoir Cover Removal 1 Place the toggle switch in the OFF position turn off the water supply and disconnect electrical power to the ice machine 2 Remove water level probes 3 Remove water float valve coil 4 Depress coil and rotate 1 4 turn counterclockwise 5 With coil wires attached lift coil off enclosure tube 6 QF0800 QC0700 ONLY Rotate quarter ...

Page 43: ...Valve Removal 1 Place the toggle switch in the OFF position turn off the water supply and disconnect electrical power to the ice machine 2 Disconnect water supply line at float valve quick disconnect by depressing stainless steel lever 3 Remove water float valve coil 4 Depress coil and rotate 1 4 turn counterclockwise 5 With coil wires attached lift coil off enclosure tube 6 QF0800 QC0700 QF2300 O...

Page 44: ...at valve coil A Depress coil and rotate 1 4 turn counterclockwise B With coil wires attached lift coil off enclosure tube 5 QF0800 QC0700 ONLY Rotate quarter turn fasteners counterclockwise 6 QF0800 QC0700 ONLY Remove cotter key and pin from ice chute 7 Remove top cover from float reservoir 8 Lift float valve out of float reservoir 9 Disconnect the drain lines from reservoir 10 Lift reservoir off ...

Page 45: ...reinstalling QF2300 1 Place the toggle switch in the OFF position turn off the water supply and disconnect electrical power to the ice machine 2 Remove ice chute retaining clamp from top of evaporator 3 Remove vinyl hose from ice chute spout 4 Follow steps to remove water reservoir 5 The ice chute elbow and the ice chute will be removed separately Support the ice chute and pull forward on the elbo...

Page 46: ...de bin door forward allowing the back of the door to lower into the bin Continue forward with the bin door until the front pins bottom out in the track 5 Lift the right side of the bin door until the front pin clears the track 6 Remove door from bin Cabinet Removal QF0400 1 Remove all ice from bin and disconnect power 2 Remove thumbscrews and evaporator panel 3 Remove three screws from the bottom ...

Page 47: ... 1 If so equipped remove the water dump valve shield from its mounting bracket 2 Leaving the wires attached twist coil and rotate it counter clockwise1 4 turn 3 Lift the coil assembly off the valve body 4 Remove the spring plunger and nylon gasket from the valve body 5 NOTE At this point the water dump valve can easily be cleaned If complete removal is desired continue with step 5 NOTE During clea...

Page 48: ...ing from the inlet to dump valve and drain water into container and discard 5 Make sure water is not trapped in any of the water lines drain lines distribution tubes etc WATER COOLED CONDENSING UNIT 1 Perform steps 1 6 in previous column 2 Disconnect the incoming water and drain lines from the water cooled condenser 3 Insert a large screwdriver between the bottom spring coils of the water regulati...

Page 49: ...ose automatically to maintain the proper water level AUTOMATIC SHUT OFF 3A Ice Run Out Ice will build up in the bin until it contacts the bin level probe After ice contacts the bin level probe for 30 continuous seconds the compressor de energizes To allow excess ice to run out the gear motor and the water float valve solenoid remain energized for an additional 45 seconds then de energize 3B Water ...

Page 50: ...and the condenser fan motor starts The compressor and condenser fan motor remain energized during the entire Freeze Cycle AUTOMATIC SHUT OFF 3A Ice Run Out Ice will build up in the bin until it contacts the bin level probe After ice contacts the bin level probe for 30 continuous seconds the compressor de energizes To allow excess ice to run out the gear motor and the water float valve solenoid rem...

Page 51: ...omatically to maintain the proper water level AUTOMATIC SHUT OFF 3A Ice Run Out Ice will build up in the bin until it contacts the bin level probe After ice contacts the bin level probe for 30 continuous seconds the liquid line solenoid valve equalization valve and compressor de energizes To allow excess ice to run out the gear motor and the water float valve solenoid remain energized for an addit...

Page 52: ...Ice Machine Sequence of Operation Section 4 4 4 Part No 80 1214 3 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 53: ...le switch to OFF and back to ICE The SafeGuard feature is stopping the ice machine Refer to SafeGuard Feature in this section Ice quality is poor Poor incoming water quality Test the quality of the incoming water and check filter Water filtration is poor Replace filter Incoming water temperature is above 90 F 32 3 C Correct water temperature Verify check mixing valves in other equipment are workin...

Page 54: ...eze cycle STANDBY MODE The first time a failure occurs the ice machine de energizes and initiates a Standby Mode The ice machine will remain off for 60 minutes then automatically restart to see if the problem reoccurs During the Standby Mode the corresponding light flashes continuously disch temp water level or speed If the same failure keeps occurring the ice machine will initiate a SafeGuard Mod...

Page 55: ... a 60 minute Standby Mode During the Standby Mode the water level light will continually flash to indicate a Standby Mode After the 60 minute Standby Mode the ice machine will de energize the water level light and initiate a start up sequence WATER CONTACTS THE WATER LEVEL PROBE The ice machine continues to make ice WATER LEVEL PROBE OPENS OR REMAINS OPEN FOR MORE THAN 90 CONTINUOUS SECONDS The ic...

Page 56: ...e ice machine will initiate a SafeGuard Mode During the SafeGuard Mode the Motor Speed Sensor light will continually flash to indicate a SafeGuard Mode The ice machine remains off until The toggle switch is moved from OFF to ICE Line voltage is interrupted and restored INDICATOR LIGHT Before 48 hours have elapsed After a Standby Mode has been initiated the Gear Motor Speed light will flash anytime...

Page 57: ...ntinues to make ice Discharge line temperature below 155 F after 30 minutes of run time The ice machine will start another 60 minute Standby Mode If the discharge line temperature drops below 155 F for 3 continuous minutes during 7 consecutive cycles the ice machine will start a SafeGuard Mode During the SafeGuard Mode the Disch Temp light will continually flash to indicate a Safeguard Mode The ic...

Page 58: ...machine continues to make ice Liquid line temperature 30 F or less after 30 minutes of run time The ice machine will start another 60 minute Standby Mode If the liquid line temperature is 30 F or less for 3 continuous minutes during 7 consecutive cycles the ice machine will start a SafeGuard Mode During the SafeGuard Mode the Disch Temp light will continually flash to indicate a Safeguard Mode The...

Page 59: ...tor assembly from ice machine 10 Apply anti seize compound to the shaft and all bolts to ease future disassembly QC700 QF800 The evaporator and motor gearbox are separate assemblies Warranty procedures require replacement of the entire evaporator or motor gearbox assembly Separate components are not available and field rebuilding during the warranty period is not allowed 1 Disconnect power to the ...

Page 60: ... pin water reservoir ice chute and drain tubing refer to Component Removal 3 Remove bolts securing foundation coupling to base 4 Lift and support evaporator evaporator weighs 80 lbs 5 Remove gear motor drip shield and disconnect line voltage wiring at motor Molex connector 6 Remove two screws holding motor speed sensor and remove sensor 7 Remove bolts securing gear motor assembly to base 8 Remove ...

Page 61: ...disassembly 8 After reinstallation of evaporator torque foundation bolts to 195 205 inch lbs QC700 QF800 The evaporator and motor gearbox are separate assemblies Warranty procedures require replacement of the entire evaporator or motor gearbox assembly Separate components are not available and field rebuilding during the warranty period is not allowed 1 Disconnect power to the ice machine 2 Remove...

Page 62: ...ervoir and evaporator 2 Remove reservoir retaining pin water reservoir ice chute and drain tubing refer to Component Removal 3 Recover refrigerant and disconnect refrigeration tubing from evaporator 4 Remove foundation coupling bolts 5 Lift evaporator out of foundation coupling and remove from ice machine 6 Remove spline hub and keyway from evaporator 8 mm hex wrench for coupling set screw 7 Apply...

Page 63: ...res the Bin Level light will de energize The 8 minute lockout time can be overridden by moving the ICE OFF CLEAN toggle switch from ICE to OFF then back to ICE Ice Making Sequence Of Operation Control Relays Sensors Length Of Time 1 2 3 4 Water Level Probe Bin Level Probe Temperature Sensor Gear Motor Speed Contactor Coil Dump Valve Gear Motor Float Valve Coil START UP 1A Water Flush Off On On Off...

Page 64: ...h until the 8 minute lockout expires After the 8 minute lockout expires the Bin Level light will de energize The 8 minute lockout time can be overridden by moving the ICE OFF CLEAN toggle switch from ICE to OFF then back to ICE Ice Making Sequence Of Operation Control Relays Sensors Length Of Time 1 2 3 4 Water Level Probe Bin Level Probe Temperature Sensor Gear Motor Speed Liquid Line Solenoid Va...

Page 65: ...kout expires the Bin Level light will de energize The 8 minute lockout time can be overridden by moving the ICE OFF CLEAN toggle switch from ICE to OFF then back to ICE Ice Making Sequence Of Operation Control Relays Sensors Length Of Time 1 2 3 4 Water Level Probe Bin Level Probe Gear Motor Speed Liquid Line Solenoid Equalization Valve Compressor Dump Valve Gear Motor Float Valve Coil START UP 1A...

Page 66: ...UND L1 L2 N 21 65 CONTACTOR COIL 90 HIGH PRESSURE CUT OUT 95 RELAY K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 47 GEARMOTOR RUN CAPACITOR 48 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 10 11 14 41 CONTACTOR CONTACTS L1 T1 RUN START 44 1A Water Flush 45 Seconds Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Contactor Coil Ope...

Page 67: ...RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 47 GEARMOTOR RUN CAPACITOR 48 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 10 11 14 41 CONTACTOR CONTACTS L1 T1 RUN START 44 1B Water Fill Until Water Contacts Water Level Probe Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Contactor Coil Open OFF Compressor OFF Condenser Fan Motor OFF 2 Dump ...

Page 68: ...90 HIGH PRESSURE CUT OUT 95 RELAY K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 47 GEARMOTOR RUN CAPACITOR 48 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 10 11 14 41 CONTACTOR CONTACTS L1 T1 RUN START 44 2 Freeze Until Ice Contacts Bin Level Probe for 30 Continuous Seconds Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Contact...

Page 69: ...then de energize SV3037 RELAY K1 GROUND L1 L2 N 21 65 CONTACTOR COIL 90 HIGH PRESSURE CUT OUT 95 RELAY K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 47 GEARMOTOR RUN CAPACITOR 48 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 10 11 14 41 CONTACTOR CONTACTS L1 T1 RUN START 44 3A Ice Run Out 45 Seconds Toggle Switch ICE Bin Level Probe Closed Ice Contacting Pro...

Page 70: ... K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 47 GEARMOTOR RUN CAPACITOR 48 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 10 11 14 41 CONTACTOR CONTACTS L1 T1 RUN START 44 3B Drain Evaporator 45 Seconds Toggle Switch ICE Bin Level Probe Closed Ice Contacting Probe Control Board Relays 1 Contactor Coil Open OFF Compressor OFF Condenser Fan Motor OFF 2 Dump V...

Page 71: ...dden by moving the ON OFF ICE toggle switch from ICE to OFF then back to ICE SV3039 RELAY K1 GROUND L1 L2 N 21 65 CONTACTOR COIL 90 HIGH PRESSURE CUT OUT 95 RELAY K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 47 GEARMOTOR RUN CAPACITOR 48 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 10 11 14 41 CONTACTOR CONTACTS L1 T1 RUN START 44 Automatic Shut Off Until ...

Page 72: ...AY K4 25 10 AMP FUSE 46 GEARMOTOR 22 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 41 CONTACTOR CONTACTS L1 T1 C4 POTENTIAL RELAY RUN CAPACITOR C4 POTENTIAL RELAY CONTACTOR COIL C4 POTENTIAL RELAY C4 POTENTIAL RELAY 21 RUN CAPACITOR FAN CYCLE CONTROL OVERLOAD COMPRESSOR 49 RUN CAPACITOR START CAPACITOR 31 62 C5 C2 C1 C R S 61 45 1A Water Flush 45 Seconds Toggle...

Page 73: ... VALVE COIL FAN MOTOR AIR COOLED ONLY 41 CONTACTOR CONTACTS L1 T1 C4 POTENTIAL RELAY RUN CAPACITOR C4 POTENTIAL RELAY CONTACTOR COIL C4 POTENTIAL RELAY C4 POTENTIAL RELAY 21 RUN CAPACITOR FAN CYCLE CONTROL OVERLOAD COMPRESSOR 49 RUN CAPACITOR START CAPACITOR 31 62 C5 C2 C1 C R S 61 45 1B Water Fill Until Water Contacts Water Level Probe Toggle Switch ICE Bin Level Probe Open No Ice Contact Control...

Page 74: ... 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 41 CONTACTOR CONTACTS L1 T1 C4 POTENTIAL RELAY RUN CAPACITOR C4 POTENTIAL RELAY CONTACTOR COIL C4 POTENTIAL RELAY C4 POTENTIAL RELAY 21 RUN CAPACITOR FAN CYCLE CONTROL OVERLOAD COMPRESSOR 49 RUN CAPACITOR START CAPACITOR 31 62 C5 C2 C1 C R S 61 45 2 Freeze Until Ice Contacts Bin Level Probe for 30 Continuous Second...

Page 75: ... CUT OUT 95 RELAY K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 22 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 41 CONTACTOR CONTACTS L1 T1 C4 POTENTIAL RELAY RUN CAPACITOR C4 POTENTIAL RELAY CONTACTOR COIL C4 POTENTIAL RELAY C4 POTENTIAL RELAY 21 RUN CAPACITOR FAN CYCLE CONTROL OVERLOAD COMPRESSOR 49 RUN CAPACITOR START CAPACITOR 31 62 C5 C2 C1 C R S 61 45...

Page 76: ...22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 41 CONTACTOR CONTACTS L1 T1 C4 POTENTIAL RELAY RUN CAPACITOR C4 POTENTIAL RELAY CONTACTOR COIL C4 POTENTIAL RELAY C4 POTENTIAL RELAY 21 RUN CAPACITOR FAN CYCLE CONTROL OVERLOAD COMPRESSOR 49 RUN CAPACITOR START CAPACITOR 31 62 C5 C2 C1 C R S 61 45 3B Drain Evaporator 45 Seconds Toggle Switch ICE Bin Level Probe Closed Ice Contacting Probe Control ...

Page 77: ...ELAY K1 GROUND L1 L2 N 21 65 CONTACTOR COIL 90 HIGH PRESSURE CUT OUT 95 RELAY K2 RELAY K3 RELAY K4 25 10 AMP FUSE 46 GEARMOTOR 22 43 56 WATER FLOAT VALVE COIL 52 22 55 51 DUMP VALVE COIL FAN MOTOR AIR COOLED ONLY 41 CONTACTOR CONTACTS L1 T1 C4 POTENTIAL RELAY RUN CAPACITOR C4 POTENTIAL RELAY CONTACTOR COIL C4 POTENTIAL RELAY C4 POTENTIAL RELAY 21 RUN CAPACITOR FAN CYCLE CONTROL OVERLOAD COMPRESSOR...

Page 78: ...r 45 seconds the dump valve de energizes SV3043 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE COIL DUMP VALVE COIL 56 55 22 51 52 7 AMP FUSE GROUND 1A Water Flush 45 Seconds Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Liquid Line Solenoid Valve OFF 2 Dump Valve O...

Page 79: ... CAPACITOR 47 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 1A Water Flush 45 Seconds High Pressure Control CLOSED Low Pressure Control OPEN Contactor Coil OPEN OFF Compressor OFF Condenser Fan Motor OFF Revised 8 2003 ...

Page 80: ...eeze Cycle SV3044 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE COIL DUMP VALVE COIL 56 55 22 51 52 7 AMP FUSE GROUND 1B Water Fill Until Water Contacts Water Level Probe Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Liquid Line Solenoid Valve OFF 2 Dump Valve OFF ...

Page 81: ...RT CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 1B Water Flush Until Water Contacts Water Level Probe High Pressure Control CLOSED Low Pressure Control OPEN Contactor Coil OPEN OFF Compressor OFF Condenser Fan Motor OFF Revised 8 2003 ...

Page 82: ...ter level SV3046 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE COIL DUMP VALVE COIL 56 55 22 51 52 7 AMP FUSE GROUND 2 Freeze Until Ice Contacts Bin Level Probe for 30 Continuous Seconds Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Liquid Line Solenoid Valve ON 2 ...

Page 83: ...eze cycle SV3042 RUN CAPACITOR 50 43 48 COMPRESSOR RUN CAPACITOR 47 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 2 Freeze Until Ice Contacts Bin Level Probe for 30 Continuous Seconds High Pressure Control CLOSED Low Pressure Contro...

Page 84: ...water float valve solenoid remain energized for an additional 4 minutes then de energize SV3047 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE COIL DUMP VALVE COIL 56 55 22 51 52 7 AMP FUSE GROUND 3A ICE RUN OUT 45 Seconds Toggle Switch ICE Bin Level Probe CLOSED Ice Contacting probe Control Boar...

Page 85: ... SV3040 RUN CAPACITOR 50 43 48 COMPRESSOR RUN CAPACITOR 47 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 3 Automatic Shut Off 45 Seconds High Pressure Control CLOSED Low Pressure Control OPEN Contactor Coil OPEN OFF Compressor OFF C...

Page 86: ...ne will begin an initial start up cycle provided the 8 minute lockout has expired SV3048 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE COIL DUMP VALVE COIL 56 55 22 51 52 7 AMP FUSE GROUND 3B Water Drain 90 Seconds Toggle Switch ICE Bin Level Probe CLOSED Ice Contacting probe Control Board Relay...

Page 87: ...te lockout time can be overridden by moving the ON OFF CLEAN toggle switch for ICE to OFF and back to ICE SV3048 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE COIL DUMP VALVE COIL 56 55 22 51 52 7 AMP FUSE GROUND Automatic Shut Off Until Ice No Longer Contacts Bin Level Probe Toggle Switch ICE B...

Page 88: ...e dump valve de energizes SV2109 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE DUMP VALVE 56 55 22 51 52 7 AMP FUSE GROUND 58 57 EQUALIZATION SOLENOID C2 C1 91 22 1A Water Flush 45 Seconds Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Liquid Line Solenoid Valve OFF...

Page 89: ... energizes SV2121 RUN CAPACITOR 50 43 48 COMPRESSOR RUN CAPACITOR 47 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 85 C1 C2 1A Water Flush 45 Seconds High Pressure Control CLOSED Low Pressure Control OPEN Contactor Coil OPEN OFF Com...

Page 90: ...NE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE DUMP VALVE 56 55 22 51 52 7 AMP FUSE GROUND 58 57 EQUALIZATION SOLENOID C2 C1 91 22 1B Water Fill Until Water Contacts Water Level Probe Toggle Switch ICE Bin Level Probe Open No Ice Contact Control Board Relays 1 Liquid Line Solenoid Valve OFF 2 Dump Valve OFF 3 Gear Motor ON 4 Water Float Valve Solenoid Coi...

Page 91: ... 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 85 C1 C2 1B Water Flush Until Water Contacts Water Level Probe High Pressure Control CLOSED Low Pressure Control OPEN Contactor Coil OPEN OFF Compressor OFF Condenser Fan Motor OFF Revi...

Page 92: ...t valve will open and close automatically to maintain the proper water level SV2111 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE DUMP VALVE 56 55 22 51 52 7 AMP FUSE GROUND 58 57 EQUALIZATION SOLENOID C2 C1 91 22 2 Freeze Until Ice Contacts Bin Level Probe for 30 Continuous Seconds Toggle Switc...

Page 93: ... 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 85 C1 C2 2 Freeze Until Ice Contacts Bin Level Probe for 30 Continuous Seconds High Pressure Control CLOSED Low Pressure Control CLOSED Contactor Coil CLOSED ON Compressor ON Condenser ...

Page 94: ... water float valve solenoid remain energized for an additional 4 minutes then de energize SV2110 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE DUMP VALVE 56 55 22 51 52 7 AMP FUSE GROUND 58 57 EQUALIZATION SOLENOID C2 C1 91 22 3A ICE RUN OUT 45 Seconds Toggle Switch ICE Bin Level Probe CLOSED Ic...

Page 95: ...121 RUN CAPACITOR 50 43 48 COMPRESSOR RUN CAPACITOR 47 46 49 44 START CAPACITOR RELAY S C R 5 2 1 45 OVERLOAD CONTACTOR CONTACTS CONTACTOR CONTACTS CONTACTOR COIL LOW PRESSURE CUT OUT HIGH PRESSURE CUT OUT 96 94 GROUND L1 L2 COMPRESSOR CRANKCASE HEATER 95 74 FAN MOTOR 85 C1 C2 3 Automatic Shut Off 45 Seconds High Pressure Control CLOSED Low Pressure Control OPEN Contactor Coil OPEN OFF Compressor ...

Page 96: ...n initial start up cycle provided the 8 minute lockout has expired SV2112 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE DUMP VALVE 56 55 22 51 52 7 AMP FUSE GROUND 58 57 EQUALIZATION SOLENOID C2 C1 91 22 3B Water Drain 90 Seconds Toggle Switch ICE Bin Level Probe CLOSED Ice Contacting probe Cont...

Page 97: ... can be overridden by moving the ON OFF CLEAN toggle switch for ICE to OFF and back to ICE SV2113 RELAY K1 RELAY K2 RELAY K3 RELAY K4 25 L1 L2 54 53 LIQUID LINE SOLENOID CENTRIFUGAL SWITCH 65 INTERNAL OVERLOAD START RUN GEARMOTOR WATER FLOAT VALVE DUMP VALVE 56 55 22 51 52 7 AMP FUSE GROUND 58 57 EQUALIZATION SOLENOID C2 C1 91 22 Automatic Shut Off Until Ice No Longer Contacts Bin Level Probe Togg...

Page 98: ...ou are servicing WIRING DIAGRAM LEGEND The following symbols are used on all of the wiring diagrams Internal Compressor Overload Some models have external compressor overloads Wire Number Designation The number is marked at each end of the wire Multi Pin Connection Electrical Box Side Compressor Compartment Side Warning Always disconnect power before working on electrical circuitry Revised 8 2003 ...

Page 99: ...PLATE FOR VOLTAGE RELAY K2 RELAY K1 RELAY K3 RELAY K4 21 52 WATER VALVE DUMP VALVE 22 51 55 90 46 HIGH PRESSURE CUTOUT 95 CONTACTOR COIL 65 43 21 47 48 GEARMOTOR RUN CAPACITOR GEARMOTOR 56 FAN MOTOR AIR COOLED ONLY L1 T1 CONTACTOR CONTACTS 41 10 11 13 12 RUN START COMPRESSOR RELAY 14 OVERLOAD 44 TOGGLE SWITCH WIRING 20 23 19 CONTROL BOARD CONNECTOR ICE OFF CLEAN TOGGLE SWITCH Revised 8 2003 ...

Page 100: ...ATER FLOAT VALVE COIL DUMP VALVE COIL 55 56 FAN MOTOR AIR COOLED ONLY FAN CYCLE CONTROL OVERLOAD COMPRESSOR RUN CAPACITOR START CAPACITOR RUN CAPACITOR RUN CAPACITOR RUN CAPACITOR GEARMOTOR 43 21 22 3 2 4 GEARMOTOR RELAY 46 C4 POTENTIAL RELAY C4 POTENTIAL RELAY C4 POTENTIAL RELAY C4 POTENTIAL RELAY 51 45 62 31 44 42 41 49 CONTACTOR CONTACTS L1 T1 COMPRESSOR POTENTIAL RELAY C1 C5 C2 C S R TOGGLE SW...

Page 101: ...own During Freeze Cycle SV2005 L2 FAN MOTOR AIR COOLED ONLY COMPRESSOR POTENTIAL RELAY C5 C2 C1 C4 43 GEARMOTOR FAN MOTOR AIR COOLED ONLY START CAPACITOR RUN CAPACITOR 62 31 49 95 21 L1 CONTACTOR CONTACTOR COIL T1 41 COMPRESSOR OVERLOAD COMMOM 65 44 22 56 45 42 COMPRESSOR RUN COMPRESSOR START 61 Revised 8 2003 ...

Page 102: ... Cycle SV3012 GROUND L2 N SEE SERIAL PLATE FOR VOLTAGE 21 53 54 10 AMP FUSE RELAY K2 RELAY K1 RELAY K3 RELAY K4 LIQUID LINE SOLENOID 52 22 51 WATER VALVE DUMP VALVE 55 56 L1 START GEARMOTOR 65 INTERNAL OVERLOAD RUN CENTRIFICAL SWITCH TOGGLE SWITCH WIRING 20 23 19 CONTROL BOARD CONNECTOR ICE OFF CLEAN TOGGLE SWITCH Revised 8 2003 ...

Page 103: ...During Freeze Cycle SV3014 RUN CAPACITOR FAN MOTOR C S R COMPRESSOR 44 47 74 95 94 96 L1 L2 HIGH PRESSURE CUTOUT LOW PRESSURE CUTOUT CONTACTOR COIL COMPRESSOR CRANKCASE HEATER CONTACTOR CONTACTS CONTACTOR CONTACTS RUN CAPACITOR START CAPACITOR 45 50 49 46 OVERLOAD 48 43 5 2 1 RELAY Revised 8 2003 ...

Page 104: ...2085 208 230V 60HZ 3PH Diagram Shown During Freeze Cycle SV3013 RUN CAPACITOR FAN MOTOR COMPRESSOR 74 95 94 96 L1 L2 HIGH PRESSURE CUTOUT LOW PRESSURE CUTOUT CONTACTOR COIL COMPRESSOR CRANKCASE HEATER CONTACTOR CONTACTS L3 L1 L2 L3 T1 T2 T3 Revised 8 2003 ...

Page 105: ... L2 SEE SERIAL PLATE FOR VOLTAGE 53 54 7 AMP FUSE RELAY K2 RELAY K1 RELAY K3 RELAY K4 LIQUID LINE SOLENOID 52 22 51 WATER VALVE DUMP VALVE 55 L1 START GEARMOTOR 65 INTERNAL OVERLOAD RUN CENTRIFICAL SWITCH TOGGLE SWITCH WIRING 20 23 19 CONTROL BOARD CONNECTOR ICE OFF CLEAN TOGGLE SWITCH 57 58 EQUALIZATION SOLENOID 22 22 51 91 C2 C1 56 Revised 8 2003 ...

Page 106: ...hown During Freeze Cycle SV2107a RUN CAPACITOR FAN MOTOR C S R COMPRESSOR 44 47 74 95 94 96 L1 L2 HIGH PRESSURE CUTOUT CONTACTOR COIL COMPRESSOR CRANKCASE HEATER CONTACTOR CONTACTS CONTACTOR CONTACTS RUN CAPACITOR START CAPACITOR 45 50 49 46 OVERLOAD 48 43 5 2 1 RELAY 85 C1 C2 Revised 8 2003 ...

Page 107: ...5 RFC2385 208 230V 60HZ 3PH Diagram Shown During Freeze Cycle SV2108a RUN CAPACITOR FAN MOTOR COMPRESSOR 74 95 94 96 L1 L2 HIGH PRESSURE CUTOUT CONTACTOR COIL COMPRESSOR CRANKCASE HEATER CONTACTOR CONTACTS L3 L1 L2 L3 T1 T2 T3 85 C2 C1 Revised 8 2003 ...

Page 108: ...R BIN LEVEL SENSOR TEMPERATURE SENSOR RESISTOR QF2300 ONLY MOTOR SPEED SENSOR ICE OFF CLEAN TOGGLE SWITCH 20 23 19 YELLOW GREEN GREEN RED GREEN GREEN RED RED RED CLEAN LIGHT FULL BIN LIGHT DISCHARGE TEMP LIGHT COMPRESSOR LIGHT WATER SOLENOID LIGHT WATER LEVEL LIGHT DUMP VALVE LIGHT SPEED LIGHT GEARMOTOR LIGHT Revised 8 2003 ...

Page 109: ...e is closed Bin Level light on when the toggle switch is moved to ICE the control system waits until the bin level probe opens Bin Level light off before starting an ice making sequence If the bin level probe is disconnected from the circuit board the ice machine will not start This prevents overfilling the bin with ice FAILURE MODES Bin Level Probe Open or Disconnected The ice machine will not st...

Page 110: ... machine will not start and the Bin Level light is energized continuously 1 Verify ice is not in contact with bin level probe 2 Disconnect bin level probe wire from the control board Continuity Cause No Replace bin level probe Yes Go to step 3 Control Board Bin Level Light Cause Off Bin level probe needed cleaning Flashes Go to step 4 CHECK FOR CONTINUITY CONNECTOR TO GROUND Control Board Bin Leve...

Page 111: ...2 Verify the motor speed sensor is in place and securely attached to the motor 3 Verify the gearmotor run capacitor is functional 4 Place toggle switch in the OFF position and place an identifying mark on the evaporator gearbox coupling This will provide a reference point to verify the coupler is rotating Move the toggle switch to the ICE position and verify the motor shaft and coupling are turnin...

Page 112: ...tial start up procedure Ninety seconds after ice machine enters Water Fill 1B the ice machine will initiate an Automatic Shut Off cycle flash the Water Level Probe light and remain off for 60 minutes Refer to No Water SafeGuard for additional information WATER LEVEL PROBE CLOSED OR SHORTED ICE MACHINE WILL CONTINUE TO RUN If the ice machine runs out of water with the water level probe shorted the ...

Page 113: ...or the Water Level Probe light Step 5 Jumper water level terminal to ground Water Level light is Compressor Cause On Energizes Replace water level probe wiring Verify defective component ohm wire from connector to connector Off Remains de energized Replace control board Step 2 Disconnect water level probe from control board water level terminal Water Level light is Compressor Cause Off Remains de ...

Page 114: ... to the thermistor resistance reading step 1 as stated in the temperature resistance chart TEMPERATURE RESISTANCE CHART As the temperature rises at the thermistor block the resistance drops Caution Use only Manitowoc thermistors Important Do not simply insert the sensing device under the insulation It must be attached to and reading the actual temperature of the discharge line Important If the ohm...

Page 115: ... components fail causing high amp draw Specifications The main fuse is 250 Volt 10 amp Check Procedure 1 If any control board lights are energized the fuse is good 2 Remove the fuse Check the resistance across the fuse with an ohm meter Relay Controls 1 Contactor Coil 2 Water Dump Valve 3 Gear Motor 4 Float Valve Coil Voltage Reading Result Line Voltage Relay is good No Voltage Relay is defective ...

Page 116: ...e water level must allow the water level probes to maintain water contact throughout the Freeze cycle The water level is factory set and normally will not require adjustment Check the water level during the Freeze cycle The water level is correct if the Water Level indicator light is energized and no water is entering the overflow tube Check for overflow water exiting the ice machine drain line at...

Page 117: ...TROL LPCO RFC2085 RFC2385 QF2200 QF2300 ONLY Function Energizes and de energizes the contactor coil when suction pressure rises above or falls below setpoint The LPCO control is closed at pressures above setpoint and opens at pressures below setpoint Specifications Check Procedure 1 Connect manifold gauges at suction and discharge access valves at the condensing unit 2 Set ICE OFF CLEAN switch to ...

Page 118: ... in discharge pressure Check Procedure 1 Verify fan motor windings are not open or grounded and fan spins freely 2 Connect a manifold gauge set to the ice machine 3 Hook a voltmeter in parallel across the fan cycle control leaving wires attached 4 Refer to chart below Model Cut In Close Cut Out Open QF0800 QC0700 250 psig 5 200 psig 5 Discharge Pressure Reading Should Be Fan Should Be above cut in...

Page 119: ... compressor to cool then check the readings again Check Motor Windings to Ground Check continuity between all three terminals and the compressor shell or copper refrigeration line Scrape metal surface to get good contact If continuity is present the compressor windings are grounded and the compressor should be replaced Determine if the Compressor is Seized Check the amp draw while the compressor i...

Page 120: ...s de energized Relay Operation Check 1 Disconnect wires from relay terminals 2 Verify the contacts are closed by checking for continuity between terminals No continuity indicates open contacts Replace the relay 3 Check the relay coil Measure the resistance between terminals No resistance indicates an open coil Replace the relay 4 Replace control box cover and restore electrical power to the ice ma...

Page 121: ...r QF2300 liquid line solenoid valve will not energize until water contacts the water level probes Be sure Steps 1 5 were followed thoroughly Intermittent problems are not usually related to the control board Diagnosing A Condensing Unit That Will Not Run RFC2085 RFC2385 If the ice machine water pump is not energized refer to Ice Machine Head Section Will Not Run 1 Verify primary voltage is supplie...

Page 122: ...Electrical System Section 6 6 60 Part No 80 1214 3 THIS PAGE INTENTIONALLY LEFT BLANK Revised 8 2003 ...

Page 123: ...Part No 80 1214 3 7 1 Section 7 Refrigeration System Tubing Schematic QF400 QC700 QF800 DRIER EVAPORATOR EXPANSION VALVE COMPRESSOR SV3082 CONDENSER AIR OR WATER RECEIVER QF400 Revised 8 2003 ...

Page 124: ...SSOR SUCTION LINE FILTER S TRAP REQUIRED 21 OR GREATER RISE HEAD PRESSURE CONTROL VALVE SUCTION SHUT OFF VALVE HEAT EXCHANGER DRIER RECEIVER SERVICE VALVE RECEIVER CHECK VALVE TXV LIQUID LINE SHUT OFF VALVE SV3015 Condensing Unit Ice Machine Head Section EVAPORATOR LLSV Revised 8 2003 ...

Page 125: ... LINE FILTER S TRAP REQUIRED 21 OR GREATER RISE HEAD PRESSURE CONTROL VALVE SUCTION SHUT OFF VALVE LLSV DRIER RECEIVER SERVICE VALVE RECEIVER CHECK VALVE TXV LIQUID LINE SHUT OFF VALVE SV2105 Condensing Unit Ice Machine Head Section EVAPORATOR EQUALIZATION VALVE SUCTION ACCUMULATOR Revised 8 2003 ...

Page 126: ...an erroneously thinks that the problem was properly diagnosed and corrected by replacing the expansion valve Actually the problem loose bulb was corrected when the technician properly mounted the bulb of the replacement expansion valve The service technician s failure to check the expansion valve bulb for proper mounting an external check resulted in a misdiagnosis and the needless replacement of ...

Page 127: ... An easy test is to squeeze a handful of ice High quality ice releases only a small amount of water As ice quality drops more water can be removed Generally speaking higher incoming water temperature results in lower ice quality Lower water temperature results in higher ice quality Ice Production Check 1 Run the ice machine a minimum of 10 minutes to allow the system to stabilize 2 Catch the ice i...

Page 128: ...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 Possible Problem List Corrective Action List Water area evaporator is dirty Clean as needed Water inlet pressure not between 20 and 80 psig Install a water regulator valve or increase the water pressure Incoming water temperature is not betwe...

Page 129: ...nly the items listed in the checklists Possible Cause Check Correct Improper installation See Installation Visual Inspection Checklist Restricted condenser air flow High inlet air temperature Condenser discharge air recirculation Dirty condenser fins Defective fan motor Defective fan cycle control QC700 QF800 only Improper refrigerant charge Overcharged Non condensables in system Wrong type of ref...

Page 130: ...ercharged Wrong type of refrigerant Non condensables in system Other Non Manitowoc components in system TXV flooding check bulb mounting Defective compressor Possible Cause Check Correct Improper installation See Installation Visual Inspection Checklist Discharge pressure Discharge pressure is too low and is affecting suction pressure See Freeze Cycle Discharge Pressure Low Checklist Improper refr...

Page 131: ...ependent on the amount of leakage in the freeze cycle A small amount of leakage will result in poor quality ice As the size of the leak increases ice quantity will decrease until ice production stops completely A small amount of leakage will cause an audible indication as the vapor passes through the valve As the size of the leak increases the audible indication becomes more apparent Refer to the ...

Page 132: ...ing the condenser 2 Determine if the head pressure is high or low in relationship to the outside temperature Refer to the proper Operational Pressure Chart If the air temperature is below 70 F 21 1 C the head pressure control will modulate to maintain the correct liquid line temperature and head pressure 3 Determine the temperature of the liquid line entering the receiver by feeling it This line i...

Page 133: ...fold 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 Verify the pressures are within the range indicated All pressure readings must be obtained at the ice machine head section Lineset length will affect pressures at the condensing unit QF400 SELF CONTAINED AIR...

Page 134: ...0 90 32 2 710 710 700 100 37 8 710 710 670 110 43 3 710 670 630 Air Temp Entering Condenser F C Freeze Cycle Discharge Pressure PSIG Suction Pressure PSIG 70 21 1 200 235 18 22 80 26 7 250 320 20 26 90 32 2 270 340 23 29 100 37 8 320 350 26 34 110 43 3 360 400 29 41 Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 710 695 655 80 26 7 710 695 655 90 32 2 700 685...

Page 135: ...0 90 32 2 760 740 680 100 37 8 760 700 660 110 43 3 730 670 610 Air Temp Entering Condenser F C Freeze Cycle Discharge Pressure PSIG Suction Pressure PSIG 70 21 1 220 235 18 22 80 26 7 250 320 20 26 90 32 2 270 340 23 29 100 37 8 320 350 26 34 110 43 3 360 400 29 41 Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 780 760 725 80 26 7 780 760 725 90 32 2 770 750...

Page 136: ... 1250 Air Temp Entering Condenser F C Freeze Cycle Discharge Pressure PSIG Suction Pressure PSIG 20 to 50 29 to10 0 220 245 175 185 14 18 70 21 1 220 250 210 225 17 21 80 26 7 245 270 18 22 90 32 2 250 275 19 23 100 37 8 315 330 23 26 110 43 3 355 375 25 28 Headmaster part number 82 5116 3 Only Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 70 21 1 2150 1980 1840 80 ...

Page 137: ...system down to 500 microns Then allow the pump to run for an additional half hour Turn off the pump and perform a standing vacuum leak check NOTE Check for leaks using a halide or electronic leak detector after charging the ice machine 4 Refer to Charging Procedures Remote Air Cooled Models Do not purge refrigerant to the atmosphere Capture refrigerant using recovery equipment Follow the manufactu...

Page 138: ...B Evacuation prior to recharging Evacuate to 500 microns Then allow the pump to run for an additional hour Turn off the pump and perform a standing vacuum leak check 6 Refer to Charging Procedures Important Replace the liquid line drier before evacuating and recharging Use only a Manitowoc OEM liquid line filter drier to prevent voiding the warranty Warning Recovery Evacuation requires connections...

Page 139: ...tamination or loss occurs 8 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 quick disconnect fitting from the high side access valve at the ice machine C Open the low side service valve at the ice machine D Open the high and low side valves on the manifold gauge set Any re...

Page 140: ...e service port Compressor damage can result 5 Ensure all vapor in charging hoses is drawn into the low side of the system then disconnect the manifold gauges 6 Run the ice machine in freeze cycle 7 Close the receiver service valve in the ice machine head section 8 Disconnect the manifold gauge set from the liquid line shut off valve 9 Open the high and low side valves on the manifold gauge set Any...

Page 141: ...on and discharge lines at the compressor for burnout deposits 5 If no signs of contamination are present perform an acid oil test Check the chart below to determine the type of cleanup required Important Manitowoc Ice Inc 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 Co...

Page 142: ...ou may perform a pressure test as a preliminary leak check You should use an electronic leak detector after system charging to be sure there is no leak 5 Charge the system with the proper refrigerant to the nameplate charge 6 Operate the ice machine Severe System Contamination Cleanup Procedure 1 Remove the refrigerant charge 2 Remove the compressor 3 If burnout deposits are found inside the sucti...

Page 143: ...OLS WITHOUT REMOVING REFRIGERANT CHARGE This procedure reduces repair time and cost Use it when any of the following components require replacement and the refrigeration system is operational and leak free High pressure cut out control High side access valve Low side access valve 1 Disconnect power to the ice machine 2 Follow all manufacturer s instructions supplied with the pinch off tool Positio...

Page 144: ...Refrigeration System Section 7 7 22 Part No 80 1214 3 Using Pinch Off Tool SV1406 Revised 8 2003 ...

Page 145: ...on the inlet side of the suction filter to allow pressure drop readings to be obtained Remote Models Contact your local Manitowoc Distributor for suction filter capable of cleaning the system The clean up filter drier must have a minimum nominal capacity of 3 hp After clean up is complete see System Contamination Clean Up Procedures remove clean up filter drier and replace with new suction filter ...

Page 146: ... To reprocess refrigerant to new product specifications see below by means which may include distillation A chemical analysis of the refrigerant is required after processing to be sure that product specifications are met This term usually implies the use of processes and procedures available only at a reprocessing or manufacturing facility Chemical analysis is the key requirement in this definitio...

Page 147: ...Revised 8 2003 ...

Page 148: ...iety of Equipment Breakfast Lunch and Hotel Room Included with Tuition Contact Your Distributor or Manitowoc Ice Inc for Details OR Visit Our Website at www manitowocice com for School Dates MANITOWOC ICE INC 2110 South 26th Street P O Box 1720 Manitowoc WI 54221 1720 Phone 920 682 0161 Service Fax 920 683 7585 Web Site www manitowocice com 2003 Manitowoc Ice Inc Litho in U S A Revised 8 2003 ...

Page 149: ...or recycled refrigerant from other products is not approved Recycling equipment must be certified to ARI Standard 740 latest edition and be maintained to consistently meet this standard Recovered refrigerant must come from a contaminant free system To decide whether the system is contaminant free consider Type s of previous failure s Whether the system was cleaned evacuated and recharged properly ...

Page 150: ...Refrigeration System Section 7 7 26 Part No 80 1214 3 THIS PAGE INTENTIONALLY LEFT BLANK Revised 8 2003 ...

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