Hoshizaki MRH/3 Bedienungsanleitung

Hoshizaki “A Superior Degree of Reliability” www.hoshizaki.com Models KM-320MAH, MWHKM-515MAH, MWH, MRHKM-600MAHKM-650MAH, MWH(-M), MRHKM-901MAH, MWH,

103. Remote Models (MRH/3)Receiver TankWater Supply InletJunction BoxesDrierControl BoxSpray TubesControl SwitchWater PumpFloat SwitchCompressorThermo

11Water SupplyFloat SwitchDrainCheck ValveThermostatic Expansion ValveCompressorHot Gas ValveHigh-Pressure SwitchStrainerFanDrierCondenserEvaporatorDi

12Water SupplyFloat SwitchDrainCheck ValveThermostatic Expansion ValveCompressorHot Gas ValveHigh-Pressure SwitchStrainerDrierCondenserEvaporatorDisch

13Water SupplyCleaning ValveFloat SwitchDrainCheck ValveCompressorHot Gas ValveCheck Valves(KM-901MRH)High-Pressure SwitchStrainerFanDrierCondenserEva

14II. Sequence of Operation and Service DiagnosisA. Sequence of Operation Flow Chart1. "E" and "G" Control Board without Harvest P

151. Bin Full Shutdown Delay:• Fill Cycle–15 sec. after activation.• Harvest Cycle–At the end of the harvest cycle, or up to 15 sec. into the

162. "G" Control Board with Harvest Pump Timer Operation 1 to 3-min. harvest timer in control (S4 dip switch 1 & 2)• Maximum inlet water

17B. Service Diagnosis WARNING• The appliance should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electri

181. "E" and "G" Control Board without Harvest Pump Timer Diagnosis3) Power On: Turn on the power supply, then move the control sw

194) 1-Minute Fill Cycle – LED 4 is on. WV energizes. After 1 min., CB checks for a closed FS. If FS is closed, harvest cycle begins. If harvest cycle

2 WARNINGOnly qualied service technicians should install and service the appliance. To obtain the name and phone number of your local Hoshizaki Certi

20e) Initial Harvest Cycle Termination Diagnosis: When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest termin

21d) PM Diagnosis: Conrm water is owing over evaporator from PM and not WV. If PM de-energizes once freeze begins, check for 115VAC at CB K1 #4 (R)

227) Pump-Out Cycle – LEDs 1, 3, and 2 are on (10/20 second pump-out). Timing of the rst pump-out is dependent on CB. "E" CB rst pump-out

239) Shutdowna) "E" Control Board: Thermostatic Bin Control (TBC): When the appliance is running, hold ice in contact with the thermostatic

242. "G" Control Board with Harvest Pump Timer Diagnosis3) Power On: Turn on the power supply, then move the control switch to the "ICE

254) 1-Min. Fill Cycle – LED 4 is on. WV and X11 relay energize. After 1 min., CB checks for a closed FS. If FS is closed, the harvest cycle begins. I

265b) Harvest Pump Timer – LEDs 1, 3, and 2 are on. When the thermistor reaches 48°F (9°C), CB reads 3.9 kΩ from the thermistor and turns harvest term

27 6) Freeze Cycle – LED 1 is on. Comp, FMR, and PM continue. FM and LLV energize. HGV and X10 relay de-energize. Appliance is held in freeze by a 5-m

28f) Refrigerant Pressures, HM, and TXV Diagnosis: If evaporator is still not cooling, check refrigerant pressures. See "VIII.B. Performance Data

29is complete. The pump-out frequency control (S4 dip switch 5 & 6) is factory set, and generally no adjustment is required. However, the pump-out

3CONTENTSImportant Safety Information ... 6I. Constructi

30C. Control Board CheckBefore replacing CB that does not show a visible defect and that you suspect is bad, always conduct the following check proced

31D. Bin Control Check1. Thermostatic Bin Control Check TBC shuts down the icemaker within 10 sec. when ice contacts the thermostatic bulb, regardless

322. Mechanical Bin Control Check and Cleaning a) Mechanical Bin Control CheckThis appliance uses a lever-actuated proximity switch to control the ice

33b) Mechanical Bin Control CleaningScale may build up on MBC. Scale can cause the actuator paddle and magnet to stick. In this case, MBC should be cl

34E. Float Switch Check and CleaningFS is used to determine that there is sufficient water in the water tank after the 1-min. ll cycle and after each

352. Float Switch CleaningDepending on local water conditions, scale may build up on FS. Scale on the switch can cause the oat to stick. In this case

36F. Thermistor CheckTo check thermistor resistance, follow the steps below.1) Turn off the power supply. 2) Remove the front panel. Move the control

37G. Diagnostic Tables1. No Ice ProductionNo Ice Production - Possible Cause1. Power Supply a) Off, blown fuse, or tripped breaker.b) Not within speci

38No Ice Production - Possible Cause15. ThermistorSee "II.F. Thermistor Check"a) Loose, disconnected, or defective.16. Pump Motor a) Motor w

39Freeze-Up - Possible Cause11. Thermostatic Expansion Valve a) Defective.12. Hot Gas Valve a) Closed or restricted.13. Liquid Line Valve a) Open.Fre

45. Bin Control Selector or Harvest Pump Timer Operation (S4 dip switch 7) ... 486. Factory Use (S4 dip switch 8) ...

40Low Ice Production - Possible CauseLong Freeze Cycle1. Evaporator a) Scaled up, dirty.2. Float SwitchSee "II.E. Float Switch Check and Cleaning

41III. Controls and Adjustments• A Hoshizaki exclusive control board is employed in KM series appliances.• All models are pretested and factory adjust

42A. Control Board Layout1. "E" Control Board "E" Control BoardPart Number 2A1410-02"E" Control BoardMicroprocessor(con

43"G" Control BoardPart Number 2A3792-01 "G" Control Board• K4 (red) Connector Mechanical Bin Control or K4 Jumper (thermostatic

44B. LED Lights and Audible Alarm Safeties1. "E" Control Board At startup, a 5-second delay occurs while the control board conducts an inter

452. "G" Control Board At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when the

46C. Settings and AdjustmentsNOTICEDip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty co

472. Harvest Timer (S4 dip switch 1 & 2)The harvest timer starts counting when the thermistor reaches 48°F (9°C) at the evaporator outlet and the

484. Pump-Out Frequency Control (S4 dip switch 5 & 6)NOTICEDo not adjust on KM-515M_H without harvest pump timer. Adjustments to this setting on K

49(2) Harvest Pump Timer, "G" Control BoardNOTICEFactory set for proper operation. Do not adjust. Adjustment outside of the factory default

5C. Wiring Diagrams ... 871. Diagrams Without H

508. Float Switch Selector (S5 dip switch 1): "G" Control BoardNOTICEDo not adjust. This must be left in the factory default position or the

51IV. Refrigeration Circuit and Component Service Information WARNING• This appliance should be diagnosed and repaired only by qualied service person

522. Brazing WARNING• R-404A itself is not ammable at atmospheric pressure and temperatures up to 176°F (80°C).• R-404A itself is not explosive or po

535) Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder. Remember to loosen the connection and pu

54B. Component Service InformationNOTICEWhen replacing a component listed below, see the notes to help ensure proper operation.Component NotesCompress

55V. MaintenanceThe maintenance schedule below is a guideline. More frequent maintenance may berequired depending on water quality, the appliance&apos

56VI. Preparing the Appliance for Periods of Non-UseNOTICE• When storing the appliance for an extended time or in sub-freezing temperatures, follow th

573. On water-cooled model, remove the water from the water-cooled condenser:1) Make sure the power supply is off, then remove the front panel and rig

58VII. DisposalThe appliance contains refrigerant and must be disposed of in accordance with applicable national, state, and local codes and regulatio

59VIII. Technical InformationA. Specication Sheets1. KM-320MAHAC SUPPLY VOLTAGE 115/60/1AMPERAGE 9.7 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUI

6Important Safety InformationThroughout this manual, notices appear to bring your attention to situations which could result in death, serious injury,

602. KM-320MWHAC SUPPLY VOLTAGE 115/60/1AMPERAGE 8.2 A (5 Min. Freeze AT 104°F / WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FUSE SIZE 20 AAPPROXIMAT

613. KM-515MAHAC SUPPLY VOLTAGE 115/60/1AMPERAGE 11.7 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FUSE SIZE 20 AAPPROXIMATE

624. KM-515MWHAC SUPPLY VOLTAGE 115/60/1AMPERAGE 9.6 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FUSE SIZE 20 AAPPROXIMATE

635. KM-515MRHAC SUPPLY VOLTAGE 115/60/1AMPERAGE 11.3A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FUSE SIZE 20 AAPPROXIMATE

646. KM-600MAHAC SUPPLY VOLTAGE 115-120/60/1AMPERAGE 12.0 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 15 AMAXIMUM FUSE SIZE 15 AAPPROXI

657. KM-650MAHAC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V)AMPERAGE 7.2 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 15 AMAXIMUM FUSE

668. KM-650MWHAC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V)AMPERAGE 5.4 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 15 AMAXIMUM FUSE

67AWAITING DATA9. KM-650MWH-MNote: We reserve the right to make changes in specications and design without prior notice.

6810. KM-650MRHAC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V)AMPERAGE 7.4 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 15 AMAXIMUM FUS

6911. KM-901MAHAC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V)AMPERAGE 11.4 A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FU

7 WARNING, continued• The appliance is not intended for use by persons (including children) with reduced physical, sensory, or mental capabilities, or

7012. KM-901MWHAC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V)AMPERAGE 8.7A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 15 AMAXIMUM FUSE

7113. KM-901MRHAC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V)AMPERAGE 11.6A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FUS

7214. KM-901MRH3AC SUPPLY VOLTAGE 208-230/60/3AMPERAGE 7.0A (5 Min. Freeze AT 104°F/WT 80°F)MINIMUM CIRCUIT AMPACITY 20 AMAXIMUM FUSE SIZE 20 AAPPROXI

73B. Performance Data1. KM-320MAH 70/21 325 147 311 141 287 13080/27 315 143 293 133 265 12090/32 311 141 278 126 251 114lbs./day kg./day100/38 304

742. KM-320MWH70/21 352 160 348 158 324 14780/27 349 158 342 155 309 14090/32 348 158 337 153 308 140lbs./day kg./day100/38 337 153 330 150 281 1277

753. KM-515MAH70/21 501 227 482 218 447 20380/27 486 221 456 207 416 18990/32 482 218 435 197 396 180lbs./day kg./day100/38 472 214 426 193 361 1647

764. KM-515MWH70/21 500 227 481 218 465 21180/27 486 220 457 207 445 20290/32 481 218 436 198 422 191lbs./day kg./day100/38 481 218 433 196 409 1867

775. KM-515MRH70/21 491 223 480 218 443 20180/27 482 219 465 211 417 18990/32 480 218 452 205 408 185lbs./day kg./day100/38 465 211 442 200 368 1677

786. KM-600MAH70/21 592 269 566 257 516 23480/27 572 260 532 241 474 21590/32 566 257 503 228 447 203lbs./day kg./day100/38 551 250 490 222 396 1807

797. KM-650MAH70/21 661 300 632 287 591 26880/27 639 290 594 269 553 25190/32 632 287 562 255 520 236lbs./day kg./day100/38 624 283 552 250 482 2197

8I. Construction and Water/Refrigeration Circuit DiagramA. Construction1. Air-Cooled Models (MAH)Thermostatic Bin ControlWater Supply InletCondenserDr

808. KM-650MWH70/21 661 300 649 294 616 28080/27 652 296 633 287 591 26890/32 649 294 620 281 581 264lbs./day kg./day100/38 637 289 611 277 546 2487

819. KM-650MWH-MAWAITING DATANote: 1. Pressure data is recorded at 5 min. into freezing cycle. The data not in bold should be used for reference

8210. KM-650MRH70/21 632 287 612 278 574 26080/27 617 280 586 266 541 24690/32 612 278 564 256 521 236lbs./day kg./day100/38 601 272 554 251 482 219

8311. KM-901MAH70/21 874 396 832 378 785 35680/27 842 382 778 353 736 33490/32 832 378 732 332 687 312lbs./day kg./day100/38 826 375 721 327 646 293

8412. KM-901MWH70/21 912 414 887 402 849 38580/27 893 405 854 388 815 37090/32 887 402 827 375 787 357lbs./day kg./day100/38 878 398 818 371 751 341

8513. KM-901MRH70/21 889 403 859 389 803 36480/27 866 393 818 371 755 34390/32 859 389 785 356 724 328lbs./day kg./day100/38 843 382 771 350 668 303

8614. KM-901MRH370/21 899 408 874 397 817 37180/27 880 399 842 382 772 35090/32 874 397 815 370 749 340lbs./day kg./day100/38 855 388 800 363 689 31

87C. Wiring Diagrams 1. Diagrams Without Harvest Pump Timer Relaysa) KM-320M_H, KM-515M_H, KM-600MAH* High-Pressure SwitchAir-Cooled Model Water-Coole

88b) KM-650MAH, KM-650MWH, KM-901MAH, KM-901MWH*Control Transformer Output 10.5V at 115V* High-Pressure SwitchAir-Cooled Model Water-Cooled ModelCut-o

89c) KM-650MRH, KM-901MRH* High-Pressure SwitchCut-out 412±22 PSIGCut-in 327±22 PSIG0*Control Transformer Output 10.5V at 115V

92. Water-Cooled Models (MWH(-M))Water Supply InletCondenserDrierControl BoxSpray TubesControl SwitchWater PumpFloat SwitchCompressorThermostatic Expa

90d) KM-901MRH3* High-Pressure SwitchCut-out 412±22 PSIGCut-in 327±22 PSIG0*Control Transformer Output 10.5V at 115V

912. Diagrams With Harvest Pump Timer Relaysa) KM-515MAH* High-Pressure SwitchCut-out 412±22 PSIGCut-in 327±22 PSIG0*Control Transformer Output 10.5V

92b) KM-650MAH, KM-650MWH, KM-901MAH* High-Pressure SwitchAir-Cooled Model Water-Cooled ModelCut-out 412±22 PSIG 384±22 PSIGCut-in 327±22 PSIG 284±22

93c) KM-650MWH-M* High-Pressure SwitchCut-out 384±22 PSIGCut-in 284±22 PSIG0*Control Transformer Output 10.5V at 115V

94* High-Pressure SwitchCut-out 412±22 PSIGCut-in 327±22 PSIG0*Control Transformer Output 10.5V at 115Vd) KM-650MRH