Hoshizaki DCM-270BAH-OS User Manual Page 1

SERVICE MANUALITEM #:73110CUBELET ICE DISPENSERReliability is abeautiful thingTMISSUED: February 10, 2004REVISED: May 26, 2005 DCM-270BAH-OS

104. Sequence of Electrical CircuitPOWER ONWATER STARTS TO BE SUPPLIED TORESERVOIRAGITATION TIMER ON - (2 SEC.)

11RESERVOIR FILLS UPGEAR MOTOR TURNS ON

12COMPRESSOR STARTS60 SEC. AFTER GEAR MOTOR.

13ICE MAKING CONTINUES.START CAPACITOR TAKENOUT OF CIRCUIT

14BIN CONTROL TRIPS.COMPRESSOR STOPS90 SECONDS LATER.

15GEAR MOTOR STOPS60 SECONDS AFTERCOMPRESSOR.

16DISPENSE ICE(BIN CONTROL STILL TRIPPED)

17FLUSH SWITCH ACTIVATED.

18FLUSH TIMER ACTIVATED.

19AGITATION TIMER ACTIVATESGEAR MOTOR.

2IMPORTANTOnly qualified service technicians should attempt to service or maintain this icedispenser. No service or maintenance should be undertaken u

20IV. Service Diagnosis1. No Ice ProductionPROBLEM POSSIBLE CAUSE REMEDY[1] The ice dispenser will not start.a) Power Supply Cord 1. Broken or loose c

21PROBLEM POSSIBLE CAUSE REMEDY[5] a) Fan Motor 1. Motor winding opened. 1. Replace.2. Bearing worn out. 2. Replace.3. Wiring to fan motor. 3. Check f

222. Low Ice ProductionPROBLEM POSSIBLE CAUSE REMEDY[1] Abnormal refrigeration circuit.a) Condenser 1. Dirty air filter or condenser.1. Clean.2. Bad v

233. Faulty DispenserPROBLEM POSSIBLE CAUSE REMEDY[1] a) 1. Ice block or bridge. 1. Remove all ice from storage bin when not using ice dispenser for

24If you experience problems with the ice or water dispense, use the following charts alongwith the wiring diagram (section III, 3) to guide you throu

254. OtherPROBLEM POSSIBLE CAUSE REMEDY[1] a) Bin Control Switch 1. Contacts fused. 1. Replace.2. Out of position. 2. Reinstall.b) Water Control Relay

26V. Removal and Replacement of ComponentsIMPORTANTEnsure all components, fasteners and thumbscrews are securely in place afterthe equipment is servic

274) Close the low-side valve and high-side valve on the service manifold.5) Disconnect the vacuum pump, and attach a refrigerant service cylinder to

283. Removal and Replacement of CompressorIMPORTANTAlways install a new drier every time the sealed refrigeration system is opened.Do not replace the

2912) Braze the process, suction and discharge lines (do not change this order), while purgingwith nitrogen gas flowing at the pressure 3-4 PSIG.13) I

3Please review this manual. It should be read carefully before the ice dispenser is servicedor maintenance operations performed. Only qualified servic

305. Removal and Replacement of Thermostatic Expansion ValveIMPORTANTSometimes moisture in the refrigerant circuit exceeds the drier capacity andfreez

3114) Place the new expansion valve cover in position.15) Replace the panels in their correct positions.16) Plug in the dispenser and turn on the powe

327. Removal and Replacement of Control Water Valve1) Unplug the icemaker.2) Remove the panels.3) Close the water supply line shut-off valve.4) Discon

338. Removal and Replacement of Flush Water Valve1) Turn off the power supply.2) Remove the panels.3) Close the water supply line shut-off valve.4) Re

349. Removal and Replacement of Float SwitchWARNING1. Fragile, handle very carefully.2. If the float switch works poorly because of scale or other for

3510. Removal and Replacement of Bin Control Switch Assembly1) Turn off the power supply and unplug the dispenser.2) Remove the top panel.3) Remove th

3611. Removal and Replacement of Storage Bin Assembly1) Move the ice making switch to the “FLUSH” position.2) Press the push button to dispense ice an

3712. Removal and Replacement of Agitator and Drip Ring1) Move the ice making switch to the “OFF” position.2) Press the push button to dispense ice an

3813. Removal and Replacement of Evaporator Assembly1) Move the ice making switch to the “OFF” position.2) Press the push button to dispense ice and r

3913) Disconnect the brazing-connections of the expansion valve and the copper tube - lowside from the evaporator, using brazing equipment.14) Braze t

4I. Specifications1. DCM-270BAH-OS (air-cooled)We reserve the right to make changes in specifications and design without prior notice.AC SUPPLY VOLTAG

4028) Assemble the removed parts in the reverse order of which they were removedWARNINGBe careful not to scratch the surface of the O-ring, or it may

41Fig. 3VI. Cleaning and Maintenance InstructionsIMPORTANTEnsure all components, fasteners and thumbscrews are securely in place afterany maintenance

422. Cleaning InstructionsWARNING1. HOSHIZAKI recommends cleaning this unit at least twice a year. Morefrequent cleaning, however, may be required in

43Fig. 5Fig. 4

4412) Replace the drip ring and agitator.13) Move the ice making switch and then the power switch to the “ON” position. Place thestorage bin cover in

45[b] Sanitizing Procedure1) Dilute approximately 1.5 fl. oz. of a 5.25% sodium hypochlorite solution (chlorine bleach)with 3 gal. of water.2) Pour th

462. Maintenance InstructionsIMPORTANTThis ice dispenser must be maintained individually, referring to the instructionmanual and labels provided with

5II. General Information1. ConstructionThe Hoshizaki Cubelet Ice Dispenser, model DCM-270BAH-OS includes water supply,freezer, condensing, storage, di

6Fig. 22.Operation - How it worksWater flows from the potable water source through the water supply line shut-off valve,enters at the water inlet fitt

7III. Technical Information1. Water Circuit and Refrigerant Circuit

82. Performance Data[a] DCM-270BAH-OS (air-cooled)Note: Pressure data is recorded first 5 minutes in freezing cycle. The data without*marks should be

93. Wiring Diagram