Manitowoc UnderCounter QM45 Installation, Use & Care Manual Download Page 31

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Section 5

Before Calling for Service

Part Number 000001774 07/08

5-5

Safety Limit #2

Harvest time exceeds 3.5 minutes for 3 consecutive harvest cycles.

Because there are many possible external problems,do not limit your diagnosis to only the items listed in
these charts.

Possible Cause

Check/Correct

Improper installation

See “Installation Instructions” Section 2 of this manual

Water system

Water area (evaporator) dirty

Water freezing behind evaporator

Low water pressure (20 psi minimum.)

Loss of water from sump area

Clogged water distribution tube

Dirty/defective water float valve

Defective water pump

Electrical system

Ice thickness probe out of adjustment

Ice thickness probe dirty

Bin switch defective

Premature harvest

Refrigeration system

Non-Manitowoc components

Improper refrigerant charge

Defective hot gas valve

TXV flooding (check insulation and bulb mounting)

Defective fan cycling control

Summary of Contents for UnderCounter QM45

Page 1: ...ed as new information and models are released Visit our website for the latest manual www manitowocfsg com America s 1 Selling Ice Machine QM45 UnderCounter Model Ice Machines Part Number 000001774 07 08 0Front fm Page 1 Thursday July 17 2008 3 41 PM ...

Page 2: ...ing statement before proceeding and work carefully Caution Text in a Caution box alerts you to a situation in which you could damage the equipment Be sure to read the Caution statement before proceeding and work carefully Important Text in an Important box provides you with information that may help you perform a procedure more efficiently Disregarding this information will not cause damage or inj...

Page 3: ...Ice Machine Dimensions 2 1 Location of Ice Machine 2 2 Ice Machine Heat of Rejection 2 2 Leveling the Ice Machine 2 2 Electrical Service 2 3 Voltage 2 3 Fuse circuit breaker 2 3 electrical Rating 2 3 Water Service Drains 2 4 Water Supply 2 4 Drain Connections 2 4 Water Supply and Drain Line Sizing Connections 2 4 Installation Checklist 2 6 Before Starting the Ice Machine 2 6 Section 3 Operation Co...

Page 4: ... Check 3 4 Water Level Check 3 5 Ice Bridge Thickness Check 3 5 Section 4 Maintenance Interior Cleaning and Sanitizing 4 1 General 4 1 Cleaning And Sanitizing Procedure 4 1 Ice Machine Inspection 4 8 Exterior Cleaning 4 8 Cleaning the Condenser 4 8 Removal From Service Winterization 4 8 Section 5 Before Calling for Service Checklist 5 1 Safety Limit Feature 5 2 Safety Limits 5 3 ...

Page 5: ...dable and affordable method of inhibiting scale formation filtering sediment and removing chlorine taste and odor MANITOWOC CLEANER AND SANITIZER Manitowoc Ice Machine Cleaner and Sanitizer are available in convenient 16 oz 473 ml and 1 gal 3 78 l bottles These are the only cleaner and sanitizer approved for use with Manitowoc products Self Contained Air Cooled Self Contained Water Cooled QM45A 11...

Page 6: ...ired when requesting information from your local Manitowoc distributor service representative or Manitowoc Ice Inc 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 ice machine Model Serial Number Location MODEL SERIAL PLATE LOCATION MODEL SERIAL PLATE LOCATION Ice Machine Model Number Serial Number ...

Page 7: ...anitowoc 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 of God 4 Premium labor rates due to holidays overtime etc travel time flat rate service call charges mileage and miscellaneous tools and material charges not listed on the payment schedule Additional labor charges resulting from the...

Page 8: ...RED This limited warranty does not cover and you are solely responsible for the costs of 1 periodic or routine maintenance 2 repair or replacement of the Product or parts due to normal wear and tear 3 defects or damage to the Product or parts resulting from misuse abuse neglect or accidents 4 defects or damage to the Product or parts resulting from improper or unauthorized alterations modification...

Page 9: ...Part Number 000001774 07 08 2 1 Section 2 Installation Instructions General These instructions are provided to assist the qualified installer Dimensions 50 00cm 79 00cm 57 00cm 1 90cm 0 63cm ...

Page 10: ...ection B T U Hour Because the heat of rejection varies during the ice making cycle the figure shown is an average Ice machines like other refrigeration equipment reject heat through the condenser It is helpful to know the amount of heat rejected by the ice machine when sizing air conditioning equipment where self contained air cooled ice machines are installed Leveling the Ice Machine After moving...

Page 11: ...ECTRICAL RATING The electrical rating is used to help select the wire size of the electrical supply The wire size or gauge also depends on location materials used length of run etc so it must be determined by a qualified electrician Warning All wiring must conform to local state and national codes Voltage Phase Total Amps 230 50 1 2 6 115 60 1 5 2 Warning The ice machine must be grounded in accord...

Page 12: ...ng back into the ice machine and storage bin Drain lines must have a 2 5 cm 1 inch drop per 1 meter 40 inches of run and must not create traps The floor drain must be large enough to accommodate drainage from all drains Insulate the bin drain line to prevent condensation WATER SUPPLY AND DRAIN LINE SIZING CONNECTIONS 1 Min Minimum 2 Max Maximum Important If you are installing a Manitowoc Tri Limin...

Page 13: ...Installation Instructions Part Number 000001774 07 08 2 5 Typical Water Supply and Drain Line Sizing and Connections WATER SHUTOFF ICE MAKING WATER INLET TUBING 3 8 MIN I D ICE MAKING WATER BIN DRAIN 5 8 MIN I D ...

Page 14: ... voltage been tested and checked against the rating on the nameplate Is there proper clearance around the ice machine for air circulation Has the ice machine been installed where ambient temperatures will remain in the range of 35 110 F 1 7 43 3 C Has the ice machine been installed where the incoming water temperature will remain in the range of 33 90 F 0 6 32 2 C Are all electrical leads free fro...

Page 15: ...1774 07 08 3 1 Section 3 Operation Component Identification ICE DAMPER BIN SWITCH MAGNET WATER PUMP FLOAT VALVE ASSEMBLY WATER DISTRIBUTION ICE THICKNESS PROBE CONDENSER AIR FILTER ON OFF WASH TOGGLE SWITCH WATER TROUGH ...

Page 16: ...w not the ice contacts the ice thickness probe After approximately 7 seconds of continual water contact the Harvest Sequence is initiated The ice machine cannot initiate a Harvest Sequence until a 6 minute freeze time has been surpassed HARVEST SEQUENCE 5 Harvest The water pump de energizes stopping flow over the evaporator The rising level of water in the sump trough diverts water out of the over...

Page 17: ...PRESSOR CONDENSER FAN MOTOR of ON TIME INITIAL START UP START UP AFTER AUTO SHUT OFF 1 Pressure Equalization OFF ON OFF OFF OFF 15 Seconds 2 Refrigeration System Start up OFF ON ON ON ON 5 Seconds FREEZE SEQUENCE 3 Pre Chill OFF OFF ON ON ON 30 Seconds 4 Freeze ON OFF ON ON ON Until 7 sec water contact with ice thickness probe HARVEST SEQUENCE 5 Harvest OFF ON ON ON ON Bin switch activation AUTOMA...

Page 18: ...d by the warranty SIPHON SYSTEM To reduce mineral build up and cleaning frequency the water in the sump trough must be purged during each harvest cycle When the water pump de energizes the level in the water trough rises above the standpipe starting a siphon action The siphon action stops when the water level in the sump trough drops When the siphon action stops the float valve refills the water t...

Page 19: ...loat valve assembly as necessary then tighten the screws 9 Move the main ON OFF WASH toggle switch to the OFF position The water level in the trough will rise above the standpipe and run down the drain 10 Replace the siphon cap on the standpipe and verify water level and siphon action by repeating steps 3 through 5 ICE BRIDGE THICKNESS CHECK The ice thickness probe is factory set to maintain the i...

Page 20: ...Operation Section 3 3 6 Part Number 000001774 07 08 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 21: ...switch in the OFF position disconnect power and water supplies to the ice machine Step 6 Remove parts for cleaning A Remove the Vinyl Hose Disconnect the water hose from the distribution tube and water pump B Remove Water Pump Disconnect the water pump power cord Water Pump Removal Loosen the screws securing the pump mounting bracket to the bulkhead Lift the pump and bracket assembly off the mount...

Page 22: ... in a container Soak the ice thickness probe a minimum of 10 minutes Clean all ice thickness probe surfaces and verify the ice thickness probe cavity is clean Rinse thoroughly with clean water then dry completely Incomplete rinsing and drying of the ice thickness probe can cause premature harvest D Remove the Water Distribution Tube Water Distribution Tube Removal Loosen the two thumbscrews which ...

Page 23: ...on fitting Remove the cap and filter screen for cleaning F Remove the Water Trough Apply downward pressure on the siphon tube and remove from the bottom of the water trough Remove the upper thumbscrew While supporting the water trough remove the two thumbscrews from beneath the water trough Remove the water trough from the bin area FLOAT VALVE BRACKET COMPRESSION FITTING CAP AND FILTER SCREEN SHUT...

Page 24: ...move the Bin Door Grasp the rear of the bin door and pull bin door forward approximately 5 Slide bin door to the rear while applying upward pressure The rear door pins will ride up into the track slot and slide backward to the stop tab While applying pressure against the bin door pull down on the rear of each bin door track until the door pins clear the stop tabs Slide the rear door pins off the e...

Page 25: ...r plastic parts including top bottom and sides Bin bottom sides and top Do not rinse the sanitized areas Step 13 Replace all removed components Step 14 Reapply power and water to the ice machine and place the toggle switch in the WASH position Step 15 Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough Step 16 Wait until the sanitize cycle is complete approximately 22 minu...

Page 26: ...ed air through the condenser fins from the inside Be careful not to bend the fan blades 4 Use a commercial condenser coil cleaner Follow the directions and cautions supplied with the cleaner 5 Straighten any bent condenser fins with a fin comb 6 Carefully wipe off the fan blades and motor with a soft cloth Do not bend the fan blades If the fan blades are excessively dirty wash with warm soapy wate...

Page 27: ...t release ice or is slow to harvest Ice machine is dirty Clean and sanitize the ice machine Ice machine is not level Level the ice machine Low air temperature around ice machine Air temperature must be at least 35 F 1 7 C Ice machine does not cycle into harvest mode The six minute freeze time lock in has not expired yet Wait for freeze lock in to expire Ice thickness probe is dirty Clean and sanit...

Page 28: ...roduces shallow or incomplete cubes or the ice Ice thickness probe is out of adjustment Adjust the ice thickness probe fill pattern on the evaporator is incomplete Water trough level is to high or too low Check the water level Water float valve filter screen is dirty Remove and clean the filter screen Water filtration is poor Replace the filter Hot incoming water Connect the ice machine to a cold ...

Page 29: ...light will be flashing continuously Determining Which Safety Limit Stopped The Ice Machine When a safety limit condition causes the ice machine to stop the harvest light on the control board continually flashes on and off Use the following procedures to determine which safety limit has stopped the ice machine 1 Move the toggle switch to OFF 2 Move the toggle switch back to ON 3 Watch the harvest l...

Page 30: ...efective water float valve Loss of water from sump area Defective water pump Electrical system Ice thickness probe out of adjustment Harvest cycle not initiated electrically Compressor relay not energizing Compressor electrically non operational Restricted condenser air flow High inlet air temperature 110 F 43 3 C maximum Condenser discharge air recirculation Dirty condenser filter Dirty condenser...

Page 31: ...ns Section 2 of this manual Water system Water area evaporator dirty Water freezing behind evaporator Low water pressure 20 psi minimum Loss of water from sump area Clogged water distribution tube Dirty defective water float valve Defective water pump Electrical system Ice thickness probe out of adjustment Ice thickness probe dirty Bin switch defective Premature harvest Refrigeration system Non Ma...

Page 32: ...Before Calling for Service Section 5 5 6 Part Number 000001774 07 08 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 33: ......

Page 34: ...eet P O Box 1720 Manitowoc WI 54221 1720 USA Ph 920 682 0161 Fax 920 683 7589 Visit us online at www manitowocfsg com 2007 Manitowoc Continuing product improvements may necessitate change of specifications without notice Part Number 000001774 07 08 ...

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