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Hoshizaki RELIABILITY IS A BEAUTIFUL THING DCM-270BAH-OS, Service Manual

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Hoshizaki RELIABILITY IS A BEAUTIFUL THING DCM-270BAH-OS Service Manual Download Page 1

Hoshizaki 

“A Superior Degree 

of Reliability” 

www.hoshizaki.com 

Models 
DCM-270BAH(-OS)

Cubelet Icemaker/Dispenser

 
 

Hoshizaki America, Inc. 

Number: 73110
Issued: 2-10-2004

Revised: 5-26-2005

SERVICE MANUAL

 

Summary of Contents for RELIABILITY IS A BEAUTIFUL THING DCM-270BAH-OS

Page 1: ...Hoshizaki A Superior Degree of Reliability www hoshizaki com Models DCM 270BAH OS Cubelet Icemaker Dispenser Hoshizaki America Inc Number 73110 Issued 2 10 2004 Revised 5 26 2005 SERVICE MANUAL...

Page 2: ...assistance HOSHIZAKI provides this manual primarily to assist qualified service technicians in the service and maintenance of the dispenser Should the reader have any questions or concerns which have...

Page 3: ...ther 25 V Removal and Replacement of Components 26 1 Service for Refrigerant Lines 26 a Refrigerant Recovery 26 b Evacuation and Recharge R 404A 26 2 Brazing 27 3 Removal and Replacement of Compressor...

Page 4: ...IGHT Net 152 lbs 69 kg Shipping 170 lbs 77kg CONNECTIONS ELECTRIC Cord Connection WATER SUPPLY Inlet 1 2 FPT DRAIN Outlet 3 4 FPT ICE MAKING SYSTEM Auger type HARVESTING SYSTEM Direct Driven Auger 80W...

Page 5: ...oshizaki Cubelet Ice Dispenser model DCM 270BAH OS includes water supply freezer condensing storage dispensing and control assemblies Note Adjustable Legs Minimum height 4 Maximum height 5 3 Do not ad...

Page 6: ...the rotating auger carries the ice upward to the end of the auger where excess water is pressed out of the ice as the ice is extruded and broken into cubelet ice compressed ice and then pushed out int...

Page 7: ...7 III Technical Information 1 Water Circuit and Refrigerant Circuit...

Page 8: ...270BAH OS air cooled Note Pressure data is recorded first 5 minutes in freezing cycle The data without marks should be used for reference We reserve the right to make changes in specifications and de...

Page 9: ...9 3 Wiring Diagram...

Page 10: ...10 4 Sequence of Electrical Circuit POWER ON WATER STARTS TO BE SUPPLIED TO RESERVOIR AGITATIONTIMERON 2SEC...

Page 11: ...11 RESERVOIRFILLSUP GEARMOTORTURNSON...

Page 12: ...12 COMPRESSORSTARTS 60 SEC AFTER GEAR MOTOR...

Page 13: ...13 ICEMAKINGCONTINUES STARTCAPACITORTAKEN OUTOFCIRCUIT...

Page 14: ...14 BINCONTROLTRIPS COMPRESSORSTOPS 90SECONDSLATER...

Page 15: ...15 GEARMOTORSTOPS 60SECONDSAFTER COMPRESSOR...

Page 16: ...16 DISPENSEICE BINCONTROLSTILLTRIPPED...

Page 17: ...17 FLUSHSWITCHACTIVATED...

Page 18: ...18 FLUSHTIMERACTIVATED...

Page 19: ...19 AGITATIONTIMERACTIVATES GEARMOTOR...

Page 20: ...en d Timer 1 Bad contacts 1 Check for continuity and replace 2 Coil winding opened 2 Replace 3 Loose connections 3 Tighten 4 Defective 4 Replace 3 a Compressor 1 Motor winding opened or grounded 1 Rep...

Page 21: ...closed or restricted 2 Open b Water Valve 1 Clogged filter 1 Clean 2 Coil winding opened 2 Replace c Float Switch 1 Contacts fused 1 Replace 2 Clogged 2 Clean d Water Control Relay 1 Bad contacts term...

Page 22: ...tor stops compressor intermittently 1 Check condenser and fan motor e Inside Wall of Evaporator 1 Scale on inside wall of freezing cylinder 1 Remove auger use Hoshizaki Scale Away or LIME A WAY soluti...

Page 23: ...ver may cause the sensors to malfunction The sensors will work with most shades colors of cups with a sensing distance of 45 to 65 mm In certain water conditions the lenses of the sensor may become sc...

Page 24: ...sor to K5 PIN 6 W BR or BK on sensor 5 VDC 5 VDC Lead 1 Lead 2 Dispense Non Dispense K2 PIN 8 DBU to K4 PIN 2 LBU 24 VAC 0 VAC K5 PIN 7 RED to K5 PIN 9 BK 5 VDC 5 VDC K5 PIN 7 RED to K5 PIN 8 WH 5 VDC...

Page 25: ...se a Fan Motor 1 Bearings worn out 1 Replace 2 Fan blade deformed 2 Replace fan blade 3 Fan blade caught on foreign object 3 Remove the object b Compressor 1 Bearings worn out or cylinder valve broken...

Page 26: ...rant access valves one on the low side and one on the high side line Using proper refrigerant practices recover the refrigerant from these two access valves and store it in an approved container Do no...

Page 27: ...frigerant access valves and disconnect the hoses and service manifold 10 Cap the access valves to prevent a possible leak 2 Brazing DANGER 1 Refrigerant R 404A itself is not flammable at atmospheric p...

Page 28: ...they use the same lubricant 1 Turn off the power supply and unplug the dispenser 2 Remove the panels 3 Remove the terminal cover on the compressor and disconnect the compressor wiring 4 Recover the r...

Page 29: ...ier IMPORTANT Always install a new drier every time the sealed refrigeration system is opened Do not replace the drier until after all other repair or replacement has been made 1 Turn off the power su...

Page 30: ...onnect the expansion valve using brazing equipment 6 Braze the new expansion valve with nitrogen gas flowing at a pressure of 3 4 PSIG WARNING 1 Do not heat the wall Place a steel barrier for protecti...

Page 31: ...nels 3 Recover the refrigerant and store it in an approved container 4 Remove the control box cover and disconnect the terminals 5 Remove the pressure switch using brazing equipment 6 Braze the new pr...

Page 32: ...e control water valve inlets and remove the control water valve Do not lose the packings inside the fitting nut 6 Remove the water supply hose from the control water valve 7 Install the new control wa...

Page 33: ...lush water valve 7 Remove the flush water valve from the frame or bracket 8 Connect the new flush water valve back onto the frame or bracket 9 Connect the tube from the plastic tee to the new flush wa...

Page 34: ...ly 2 Close the water supply line shut off valve 3 Remove the panels 4 Flush water out of the system 5 Cut the float switch leads at the wire connectors 6 Turn and unfasten the flanged top and remove t...

Page 35: ...the top panel 3 Remove the bin control switch from the storage bin cover Twist then pull up 4 Cut the wire leads and remove switch 5 Assemble the replacement switch reversing the procedure used to re...

Page 36: ...panels 5 Remove the storage bin cover 6 Remove the agitator drip ring drip plate and shutter assembly 7 Remove the three socket head cap screws and lift off the storage bin assembly 8 Install the new...

Page 37: ...nd unplug the dispenser 4 Remove the top panel 5 Remove the storage bin cover 6 Rotate the agitator counterclockwise and lift off 7 Rotate the drip ring about 30 degrees clockwise and lift off 8 Insta...

Page 38: ...te Replacing the bearing requires a fitting tool If one is not available replace the whole extruding head Auger 9 Lift up and turn the auger until it comes off If the area in contact with the bearings...

Page 39: ...Remove the four hexagon bolts securing the housing to the gear motor 22 Remove the mechanical seal fixed on the housing Note The mechanical seal consists of two parts One moves along with the auger an...

Page 40: ...chanical seal with care not to scratch nor to contaminate its contact surface 29 Check for water leaks WARNING After assembling the extruding head be sure to check that the auger does not come into co...

Page 41: ...ing air or carbon dioxide Shut off the ice dispenser until the proper ambient temperature is resumed 1 Close the water supply line shut off valve 2 Move the ice making switch located on the control bo...

Page 42: ...ce making switch located on the control box to the FLUSH position 4 Press the ICE push button and remove all ice from the storage bin 5 After water has drained out through the drain pan move the power...

Page 43: ...43 Fig 5 Fig 4...

Page 44: ...clean warm water carefully onto the bin liner agitator drip ring and into the reservoir through the opening in the center of the storage bin to melt the ice and rinse out the cleaning solution 16 Move...

Page 45: ...e bin to melt the ice and rinse out the sanitizing solution Be careful not to wet the bin control switch on the storage bin cover 7 Remove the bin control switch from the storage bin cover and immerse...

Page 46: ...off oil or dirt build up 2 Air Filter See Fig 6 A plastic mesh air filter removes dirt or dust from the air and keeps the condenser from getting clogged As the filter gets clogged the ice dispenser s...

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