Hoshizaki FD-1001MLH(-C) manual

Hoshizaki “A Superior Degree of Reliability” www .hoshizaki.com Models FD-1001MAH(-C) FD-1001MWH(-C) FD-1001MRH(-C) FD-1001MLH(-C) Modular Flaker Hoshizaki America, Inc. Number: 73159 Issued: 2-12-2010 S E RV I C E M A N U A L[...]

 IMPORTANT Only qualied service technicians should install, service, and maintain the icemaker. No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual. Failure to service and maintain the equipment in accordance with this manual may adversely affect safety, performance, component life, and [...]

3 IMPORTANT This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualied service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for an[...]

4 3. Alarm Safeties ....................................................................................................... 30 a) Low Water Safety (1-beep alarm) .................................................................... 30 b) Control Switch in the "DRAIN" Position (-beep alarm) ................................... 30 c) High [...]

5 IV. Service Diagnosis .......................................................................................................... 58 A. Ice Production Check .................................................................................................. 58 B. Diagnostic Procedure ..................................................................[...]

6 VI. Cleaning and Maintenance ............................................................................................ 96 A. Cleaning and Sanitizing Instructions ........................................................................... 96 1. Cleaning Solution ...................................................................................[...]

7 Important Safety Information Throughout this manual, notices appear to bring your attention to situations which could result in death, serious injury, or damage to the unit. WARNING Indicates a hazardous situation which could result in death or serious injury. CAUTION Indicates a situation which could result in damage to the unit. IMPORTANT Indic[...]

8 I. Specications A. Icemaker 1. FD-1001MAH (air-cooled) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

9 Note: We reserve the right to make changes in specications and design without prior notice. 2. FD-1001MAH-C (air-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 4.2 RLA 34 LRA GEAR MOTOR 120 V 3 FLA 1/4 HP FAN MOTOR 115 V 0.85FLA 1/15 HP OTHER 120 V 0.03A MAXIMUM FUSE SIZE 15 A MAX. HACR BREAKER (USA ONLY[...]

10 3. FD-1001MWH (water-cooled) Note: We reserve the right to make changes in specications and design without prior notice. Awaiting Data[...]

11 Note: We reserve the right to make changes in specications and design without prior notice. 4. FD-1001MWH-C (water-cooled) Awaiting Data[...]

1 Note: We reserve the right to make changes in specications and design without prior notice. 5. FD-1001MRH (remote air-cooled) Awaiting Data[...]

13 6. FD-1001MRH-C (remote air-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) COMPRESSOR 240 V 4.2 RLA 34 LRA GEAR MOTOR 120 V 3 FLA 1/4 HP FAN MOTOR REMOTE 115 V 3A MAX OTHER 120 V 0.03A MAXIMUM FUSE SIZE 15 A MAX. HACR BREAKER (USA ONLY) 15 A MAX. CIRC. BREAKER (CANADA ONLY) 15 A MINIMUM CIRCUIT AMPACITY 15 A APPROXIMATE IC[...]

14 7. FD-1001MLH (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

15 8. FD-1001MLH-C (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

16 AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR 115 V Total 1.3FLA 65W EXTERIOR DIMENSIONS (WxDxH ) 21-15/16" x 15-11/16" x 17-7/8" (557 x 398 x 454 mm) DIMENSIONS INCLUDING LEGS (WxDxH ) 24" x 18-1/8" x 32-13/16" (610 x 460 x 834 mm) EXTERIOR FINIS H Galvanized Steel WEIGHT Net 61 lbs. ( 28 kg ) Shipp[...]

17 b) Dimensions 24" (610 mm) 23-1/32" (585 mm) 19-11/16" (500 mm) 18-1/8" (460 mm) 20-15/32" (520 mm) 21-15/16" (557 mm) 7/8" DIA. HOLE (23 mm DIA.) 6-5/16" (160 mm) 2-15/16" (75 mm) 18-1/8" (460 mm) 6/16" × 3/4" (10×20 mm) 4×2 (SLO TTED HOLES) 17-1/8" (435 mm) 14-9/16" (370 [...]

18 II. General Information A. Construction 1. FD-1001MAH(-C) (air-cooled) Inlet Water Valve Expansion Valve Control Box Air-Cooled Condenser Mechanical Bin Control Spout Evaporator Gear Motor Compressor Fan Motor Ice Chute Infrared Sensor Extruding Head Heater (FD-1001MAH-C)[...]

19 2. FD-1001MWH(-C) (water-cooled) Inlet Water Valve Expansion Valve Control Box Water-Cooled Condenser Mechanical Bin Control Spout Evaporator Gear Motor Compressor Water Regulating Valve Ice Chute Infrared Sensor Extruding Head Heater (FD-1001MWH-C)[...]

0 3. FD-1001MRH(-C) (remote air-cooled) Inlet Water Valve Expansion Valve Control Box Mechanical Bin Control Spout Evaporator Gear Motor Compressor Ice Chute Infrared Sensor Extruding Head Heater (FD-1001MRH-C)[...]

1 4. FD-1001MLH(-C) (low side, parallel rack system) Inlet Water Valve Expansion Valve Control Box Mechanical Bin Control Spout Evaporator Gear Motor Ice Chute Evaporator Pressure Regulator Suction Line Valve Liquid Line Valve Strainer Infrared Sensor Extruding Head Heater (FD-1001MLH-C)[...]

 5. Ice Making Unit Cutter Extruding Head Upper Bearing Extruding Head Heater (Cubelet Models Only) Auger Cylinder Mechanical Seal O-Ring Housing-Lower Bearing Spline Coupling Gear Motor Hexagon Head Bolt Insulation Allen Head Cap Screw Allen Head Cap Screw[...]

3 B. Sequence of Operation The steps in the sequence are as outlined below. This unit utilizes a control board to switch the components on and off as needed. When power is supplied, the power switch is in the "ON" position, and the control switch is in the "ICE" position, CB "POWER OK" LED comes on. 1. Sequence Cycl[...]

4 (3) Manual Drain: Manual drain is used when servicing evaporator components and cleaning and sanitizing the unit. When the unit is making ice and the control switch is moved to the "DRAIN" position, there is a 3-second delay, then CR (X1 on CB) and Comp (LLV and SLV on MLH models) de-energize and the 5-minute ice purge timer begins. [...]

5 1-in-1 drain cycle. DV opens for  seconds every hour (S1 Dip Switch 4). Icemaker status does not change. FD Sequence Flow Chart LF/S closed UF/S closed FT off WV off 3. 1-in-12 Drain Cycle & Restart (optional) 3 . Icemaker Off UF/S open LF/S open (WV on) FT started (90 sec.) WV on CR continues Comp continues GMR continues GM continues G[...]

6 C. Control Board • A Hoshizaki exclusive control board is employed in FD-1001MAH(-C), FD-1001MWH(-C), FD-1001MRH(-C), and FD-1001MLH(-C) Modular Flakers. • All models are pre-tested and factory set. CAUTION 1. The control board is fragile; handle very carefully. . The control board contains integrated circuits, which are susceptible to [...]

7 "F-A" Control Board "F-A" Control Board Part Number A496-01 • "FLUSH" LED (X3 Relay) (drain) DV • "COMP" LED (X1 Relay) Comp LLV SLV • "GM" LED (X2 Relay) GM FMR FMS • K1 Connector (115VAC) #3 Input (black) # GM, FMR, FMS (brown) Drain Valve #10 (white/blue) • "WTRIN&quo[...]

8 2. Features a) Low Water Safety When the inlet water valve opens during ll and rell, a 90-second low water safety timer starts. Once the upper oat switch closes the 90-second low water safety timer terminates. If the upper oat switch remains open longer than 90 seconds, a 1-beep alarm sounds. The water valve and 1-beep alarm contin[...]

9 f) High Voltage and Low Voltage Cut-outs The maximum and minimum allowable supply voltages of this icemaker are limited by the high voltage (147Vac±5% or more) and low voltage (9Vac±5% or less) cut-outs. When high voltage (147Vac±5% or more) is present, the icemaker automatically stops and the control board signals with a 7-beep alarm ev[...]

30 3. Alarm Safeties a) Low Water Safety (1-beep alarm) (1) Fill Cycle: If upper oat switch remains open 90 seconds after the inlet water valve has energized, the control board sounds a 1-beep alarm every 5 seconds. The alarm resets and the icemaker automatically starts running again once water is restored or the oat switch is cleaned or repl[...]

31 f) High Voltage (7-beep alarm) The maximum allowable supply voltage for this icemaker is limited by the high voltage cut-out. When high voltage (147.5Vac ±5% or more) is present, the "POWER OK" LED turns off and the control board shuts down the unit and sounds a 7-beep alarm every 5 seconds. When the proper supply voltage resumes, the[...]

3 b) Infrared Sensor Shutdown Delay (S1 dip switch 1, 2, & 3) Infrared sensor shutdown delay is the delay between the infrared sensor detecting ice (yellow LED ashing or steady) and the start of the shutdown sequence. For dispenser unit applications, the ice level at shutoff may need to be adjusted depending on the dispenser agitation or [...]

33 e) Bin Control Selector (S1 dip switch 7) This unit is factory set for infrared sensor bin control operation. No adjustment is required. When used on a standard ice storage bin, the mechanical bin control may be used instead of the infrared sensor by moving S1 dip switch 7 to the off position. In the factory default position (S1 dip switch 7 in [...]

34 D. Bin Control An infrared sensor is used to control the level of ice in the dispenser unit/ice storage bin (S1 dip switch 7 in the "ON" position). The infrared sensor is the primary bin control device. 0VDC powers the infrared sensor from the control board K6 connector. A green power LED and a yellow ice detection LED are located o[...]

35 III. Technical Information A. Water Circuit and Refrigeration Circuit 1. FD-1001MAH(-C) (air-cooled) Drier Condenser Cond ense r Fan Motor Access Valve Pressure Switch Access Valve Compressor Water Circuit Refrigerant Circuit Overow Reservoir Gear Motor Drain Valve Expansion Valve Spout Water Level Evaporator Float Switch Inlet Water Valve Wa[...]

36 2. FD-1001MWH(-C) (water-cooled) Drier Condenser Access Valve Pressure Switch Access Valve Compressor Water Circuit Refrigerant Circuit Overow Reservoir Gear Motor Drain Valve Expansion Valve Spout Water Level Evaporator Float Switch Inlet Water Valve Water Supply Line Drain Pan Drain Outlet Insulation Water Regulating Valve Cond. Water Outle[...]

37 3. FD-1001MRH(-C) (remote air-cooled) Drier Condenser Condenser Fan Motor Fusible Plug Pressure Switch Access Valve Compressor Water Circuit Refrigerant Circuit Overow Reservoir Gear Motor Drain Valve Expansion Valve Spout Water Level Evaporator Float Switch Inlet Water Valve Water Supply Line Drain Pan Drain Outlet Insulation Condenser Unit [...]

38 4. FD-1001MLH(-C) (low side, parallel rack system) Multi-Rack Condensing Unit Suction Line Valve Access Valve Water Circuit Refrigerant Circuit Overow Reservoir Gear Motor Drain Valve Expansion Valve Spout Water Level Evaporator Float Switch Inlet Water Valve Water Supply Line Drain Pan Drain Outlet Insulation Evaporator Pressure Regulator Va[...]

39 B. Wiring Diagrams 1. FD-1001MAH(-C), FD-1001MWH(-C), FD-1001MRH(-C) CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RELAY WIRE COLOR CODE R RED BK BLACK BR BROWN O ORANGE Y YELLOW GR GREEN GY GRAY P PINK V VIOLET W WHITE LBU LIGHT BLUE DBY DARK BLUE W/BU WHITE / BLUE W/R WHITE / RED W/BK WHITE / BLACK W/BR WHITE / BROWN W/0 WHITE [...]

40 2. FD-1001MLH(-C) CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RELAY WIRE COLOR CODE R RED BK BLACK BR BROWN O ORANGE Y YELLOW GR GREEN GY GRAY P PINK V VIOLET W WHITE LBU LIGHT BLUE DBY DARK BLUE W/BU WHITE / BLUE W/R WHITE / RED W/BK WHITE / BLACK W/BR WHITE / BROWN W/0 WHITE / ORANGE[...]

41 3. Sequence Wiring Diagram a) Fill Cycle . Power supply is turned on. Inlet water valve energizes and reservoir lls. CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RELAY WIRE COLOR CODE R RED BK BLACK BR BROWN O ORANGE Y YELLOW GR GREEN GY GRAY P PINK V VIOLET W WHITE LBU LIGHT BLUE DBY DARK BLUE W/BU WHITE / BLUE W/R WHITE / R[...]

4 b) Ice Purge Cycle Upper oat switch closes, 30-second gear motor delay timer starts. After 30-second gear motor delay timer terminates, 5-minute ice purge timer starts, gear motor, fan motor/ fan motor-remote energize. Note: The 30-second gear motor delay is active when S1 dip switch 7 is in the on position. Otherwise, gear motor has a 5-se[...]

43 c) Freeze Cycle 5-minute ice purge timer terminates, compressor energizes (liquid line valve, and suction line valve on MLH models). CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RELAY WIRE COLOR CODE R RED BK BLACK BR BROWN O ORANGE Y YELLOW GR GREEN GY GRAY P PINK V VIOLET W WHITE LBU LIGHT BLUE DBY DARK BLUE W/BU WHITE / BLUE [...]

44 CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RELAY WIRE COLOR CODE R RED BK BLACK BR BROWN O ORANGE Y YELLOW GR GREEN GY GRAY P PINK V VIOLET W WHITE LBU LIGHT BLUE DBY DARK BLUE W/BU WHITE / BLUE W/R WHITE / RED W/BK WHITE / BLACK W/BR WHITE / BROWN W/0 WHITE / ORANGE d) 1-in-1 Drain Cycle Compressor, (liquid line valve, suctio[...]

45 e) 1-in-12 Drain Cycle 1-in-1 drain cycle initiates (S1 dip switch 4). Compressor and fan motor/fan motor-remote de-energize. 5-minute ice purge timer starts and gear motor continues. 5-minute ice purge timer terminates, gear motor de-energizes. Drain valve opens for 10 minutes. CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RE[...]

46 f) Infrared Sensor Shutdown Ice lls storage bin to level of activating infrared sensor, infrared sensor yellow LED turns on (ashing or steady). Infrared sensor shutdown sequence begins. For further information, see "II.B.1.e) Shutdown Cycle." CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH X1 COMPRESSOR RELAY WIRE COLOR CODE R RE[...]

47 g) Mechanical Bin Control Shutdown Ice lls the chute to the point of engaging the mechanical bin control. Dip Switch 7 "ON": The icemaker shuts down within 10 seconds of the mechanical bin control opening and a 9-beep alarm sounds. Dip Switch 7 "OFF": Hoshizaki ice storage bin applications only. The icemaker shuts down wit[...]

48 h) Low Water Safety During ll or rell, should the upper oat switch fail to close within 90 seconds after the water valve energizes, a 1-beep alarm sounds. The water valve remains open until the upper oat switch closes. If this occurs during rell, the icemaker cycles down. CONTROL BOARD S1 SERVICE BUTTON S DIP SWITCH CONTROL X1 [...]

49 i) High Pressure Switch If pressure on the refrigeration circuit high-side exceeds Hoshizaki specications, a high pressure switch activates. The control board then shuts down the unit until the high-side pressure returns to an acceptable level. See "II.C.3.c) High Pressure Switch (3 & 4-beep alarms)." CONTROL BOARD S1 SERVICE BU[...]

50 C. Performance Data 1. FD-1001MAH (air-cooled) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

51 APPROXIMATE Ambient Water Temp. (°F) ICE PRODUCTION Temp. (°F) PER 24 HR. 70 *940 *(427) 890 (405) 855 (389) 80 820 (373) 790 (358) 755 (344) 90 725 (330) *695 *(317) 670 (304) lbs./day (kg/day) 100 640 (292) 615 (280) *580 *(265) APPROXIMATE ELECTRIC 70 *1404 -- 1402 -- 1400 -- CONSUMPTION 80 1398 -- 1395 -- 1393 -- 90 1391 -- *1389 -- 1372 -[...]

5 Note: We reserve the right in make changes to specications and design without prior notice. Awaiting Data 3. FD-1001MWH (water-cooled)[...]

53 4. FD-1001MWH-C (water-cooled) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

54 5. FD-1001MRH (remote air-cooled) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

55 APPROXIMATE Ambient Water Temp. (°F) ICE PRODUCTION Temp. (°F) PER 24 HR. 70 *930 *(423) 895 (406) 860 (390) 80 825 (375) 790 (360) 760 (345) 90 730 (332) *720 *(326) 670 (306) lbs./day (kg/day) 100 645 (294) 620 (282) *580 *(263) APPROXIMATE ELECTRIC 70 *1401 -- 1408 -- 1415 -- CONSUMPTION 80 1422 -- 1428 -- 1435 -- 90 1442 -- *1449 -- 1444 -[...]

56 7. FD-1001MLH (low side, parallel rack system) Awaiting Data Note: We reserve the right to make changes in specications and design without prior notice.[...]

57 Awaiting Data 8. FD-1001MLH-C (low side, parallel rack system) Note: We reserve the right to make changes in specications and design without prior notice.[...]

58 IV. Service Diagnosis WARNING 1. This unit should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re. . Risk of electric shock. Use extreme caution and exercise safe electrical practices. 3. Moving parts (e.g., fan blade) can crush and cut. Keep hands clear. 4. [...]

59 5) Turn on the power supply, then move the power switch to the "ON" position. Make sure the control switch is in the "ICE" position. CB "POWER OK" LED and IS green LED turn on. Diagnosis "POWER OK" LED : Check that CB "POWER OK" LED is on. If not, check for proper supply voltage (115VAC) input to[...]

60 7) Ice Purge Cycle – "GM" LED is on . 30-second GM delay timer and 30-minute freeze timer start. WV de-energizes and "WTRIN" LED turns off. Once the 30-second GM delay timer terminates, the 5-minute ice purge timer starts. GMR (X on CB), GM, GMPR, FM/FMR, and EHH (-C model only) energize. Diagnosis : If "GM" LE[...]

61 10) Shutdown – See "IV.D. Bin Control Check." Legend: CB –control board; Comp –compressor; DV –drain valve; EHH –extruding head heater (-C model only); FM –fan motor; FMR –fan motor-remote; GM –gear motor; GMPR –gear motor protect relay; GMR –gear motor relay; IS –infrared sensor; LF/S –lower oat switch; LLV [...]

6 4) Infrared Sensor (K6 connector): Check that the infrared sensor green LED is on. If not, check for 0VDC from the black K6 connector dark blue wire (DBU) to the K6 connector brown (BR) wire. See Fig. 4. If 0VDC is not present, the control board is bad and must be replaced. Next, conrm that the yellow LED is not ashing or steady. I[...]

63 a. Control Switch (K9 connector pins #1 and # white/black (W/BK) wires): 5VDC is present from the white K5 connector pin closest to red K4 connector to the K9 connector pin #1 white/black (W/BK) wire at all times. If 5VDC is not present, the control board is bad and must be replaced. When the control switch is in the "ICE" position,[...]

64 e. Float Switch (K8 connector pins #5 black (BK) wire, #6 red (R) wire (upper), and #7 dark blue (DBU) wire (lower)): 5VDC is present from the white K5 connector pin closest to red K4 connector to the K8 connector pin #5 (black (BK) wire). If 5VDC is not present, the control board is bad and must be replaced. For further oat switch diagnostic[...]

65 Drain Valve #10 (white/blue) • K6 Connector (20VDC) Infrared Sensor • "SERVICE" Button (Ice Purge Cycle Bypass) Transformer 4VAC Input #1 (white/red) Upper Float Switch #6 (red) Open-5VDC to #5 black Closed-0VDC to #5 black Mechanical Bin Control #3 to #4 (gray) Open-5VDC Closed-0VDC Gear Motor Protect Relay Circuit #5 to #6 (wh[...]

66 D. Bin Control Check 1. Infrared Sensor Check IMPORTANT Make sure S1 dip switch 7 is in the "ON" position. This allows the control board to monitor the infrared sensor along with the mechanical bin control. 1) Turn off the power supply. ) Remove the front panel, top panel, and control box cover. 3) Conrm that S1 dip switch 1, [...]

67 9) Remove the object covering the infrared sensor. If you removed the infrared sensor housing from the base, replace it in its correct position, and secure it with the thumbscrew. 10) Move the power switch to the "OFF" position. Turn off the power supply, then proceed to "IV.D.. Mechanical Bin Control Check." 2. Mechanical[...]

68 5) Make sure the "GM" LED is on. There is a delay of at least 30 seconds before the "GM" LED turns on after power-up. After the "GM" LED turns on, press the "SERVICE" button on the control board to bypass the 5-minute compressor delay. WARNING! Risk of electric shock. Care should be taken not to touch live[...]

69 E. Float Switch Check and Cleaning 1. Float Switch Check 1) Remove the front panel and move the power switch to the "OFF" position. Move the control switch to the "DRAIN" position. ) Move the power switch to the "ON" position. 3) Allow the water to drain from the reservoir, then move the power switch to the "[...]

70 Red (R) (upper float s witch) Black (BK) (common) Dark Blue (DBU) (lower float s witch) Upper Float (blue) Magnet (tow ards top) Magnet (tow ards top) Low er Float (white) Plastic Retainer Clip Spring Retainer Clip Reservoir Reservoir Cover Float Switch Assembly Fig. 9 Fig. 10[...]

71 F. Diagnostic Charts 1. No Ice Production Problem Possible Cause Remedy [1] The icemaker will not start. a) Power Supply 1. Off, blown fuse, or tripped breaker. 1. Turn on, replace, or reset. . Loose connection. . Tighten. 3. Bad contacts. 3. Check for continuity and replace. 4. Not within specications. 4. Refer to nameplate and correct[...]

7 Problem Possible Cause Remedy [1] The icemaker will not start (continued). i) High Pressure Switch (continued) 7. Condenser water pressure too low or off (water-cooled model). 7. Check and get recommended pressure. 8. Water regulating valve set too high (water-cooled model). 8. Adjust it lower. j) Control Switch 1. "DRAIN" position. [...]

73 Problem Possible Cause Remedy [4] Freeze cycle will not start (compressor) (continued). d) Compressor 1. Wiring to compressor. 1. Check for loose or open connection, repair or replace. . Loose connections. . Tighten. 3. Motor winding opened or grounded. 3. Replace. 4. Compressor locked and motor protector tripped. 4. Replace. e) Power Supp[...]

74 2. Low Ice Production Problem Possible Cause Remedy [1] Low ice production. a) Evaporator 1. Dirty. 1. Clean. See "VI.A. Cleaning and Sanitizing Instructions." b) Bin Control 1. Erratic, sticking, defective. 1. See "IV.D. Bin Control Check." c) Losing Water 1. Drain valve leaking. 1. Clean or replace. . Mechanical seal lea[...]

75 3. Other Problem Possible Cause Remedy [1] Icemaker will not stop when bin is lled with ice. a) Bin Control 1. Erratic or defective. 1. See "IV.D. Bin Control Check." [] Abnormal noise a) Fan Motor (except water-cooled model) 1. Bearing worn out. 1. Replace. . Fan blade deformed. . Replace fan blade. 3. Fan blade does not m[...]

76 V. Removal and Replacement of Components WARNING 1. This unit should be diagnosed and repaired only by qualied service personnel to reduce the risk of death, electric shock, serious injury, or re. . Move the power switch to the "OFF" position and turn off the power supply before servicing. Lockout/Tagout to prevent the power f[...]

77 2. Brazing WARNING 1. R-404A itself is not ammable at atmospheric pressure and temperatures up to 176°F (80°C). . R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open ames), R-404A can be decomposed to form hydrouoric acid and carbonyl uoride both of which are hazardous. 3. Do not use sil[...]

78 5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder. Remember to loosen the connection and purge the air from the hose. For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled models, see the rating label inside the icemaker. Hoshi[...]

79 4) Close the low-side valve and high-side valve on the gauge manifold. 5) Disconnect the gauge manifold hose from the vacuum pump and attach it to a refrigerant service cylinder. Remember to loosen the connection and purge the air from the hose. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (l[...]

80 6) Remove the hold-down bolts, washers, and rubber grommets. 7) Remove the compressor. Unpack the new compressor package. 8) Attach the rubber grommets of the prior compressor to the new compressor. 9) Place the compressor in position and secure it using the bolts and washers. 10) Place the new drier in position. 11) Remove plugs from the suctio[...]

81 Fig. 11 8) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). DO NOT use R-404A as a mixture with pressurized air for leak testing. 9) Evacuate the system, and charge it with refrigerant. Fo[...]

8 1. Upper Bearing Wear Check To ensure that the bearing inside the extruding head does not exceed the wear tolerance of .0", follow the instructions below. 1) Turn off the power supply. ) Remove the panels. 3) Remove the strap connecting the spout to the chute assembly, then remove the spout. 4) Remove the bolt from the auger and lif[...]

83 3. Removal and Replacement of Extruding Head 1) Drain the water from the evaporator. a) Move the power switch to the "OFF" position. b) Move the control switch to the "DRAIN" position. c) Move the power switch to the "ON" position and allow the water to drain from the evaporator. d) Move the power switch to the &quo[...]

84 5. Removal and Replacement of Evaporator CAUTION 1. 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. Install the new drier with the arrow on the drier in the direction of the refrigerant ow. 3. When brazing, protect the dri[...]

85 16) Evacuate the system, and charge it with refrigerant. For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge. For remote air-cooled models, see the rating label inside the icemaker. 17) Replace the removed parts in the reverse order of which they were removed. 18) Replace the panels in their correct posi[...]

86 6b. Lower Housing 10) Remove the bolts securing the housing to the gear motor and remove the housing from the gear motor. If inspection of the upper bearing inside the extruding head (see "V.D.1. Upper Bearing Wear Check") indicates that it is out of tolerance, replace both it and the bearing inside the lower housing. Note: Replacing t[...]

87 E. Removal and Replacement of Air-Cooled Condenser CAUTION 1. 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. Install the new drier with the arrow on the drier in the direction of the refrigerant ow. 3. When brazing, prote[...]

88 F. Removal and Replacement of Water-Cooled Condenser CAUTION 1. 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. Install the new drier with the arrow on the drier in the direction of the refrigerant ow. 3. When brazing, pro[...]

89 G. Removal and Replacement of Water Regulating Valve - Water-Cooled Model CAUTION 1. 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. Install the new drier with the arrow on the drier in the direction of the refrigerant ow.[...]

90 18) Open the condenser water supply line shut-off valve. If connected to a closed loop water supply, also open the condenser return outlet shut-off valve. 19) Check for water leaks. 0) Replace the panels in their correct positions. 1) Turn on the power supply. H. Adjustment of Water Regulating Valve - Water-Cooled Model The water regulatin[...]

91 J. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.) - Remote Air-Cooled Model CAUTION 1. 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. Install the new drier with the arrow on the drier in the d[...]

9 K. Removal and Replacement of Liquid Line Valve or Suction Line Valve - MLH Model (low side, parallel rack system) CAUTION 1. Always replace the strainer when replacing the liquid line valve. . Always install a new drier every time the sealed refrigeration system is opened. 3. Do not replace the drier until after all other repair or replace[...]

93 L. Removal and Replacement of Evaporator Pressure Regulator (E.P.R.) MLH Model (low side, parallel rack system) CAUTION 1. 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. Install the new drier with the arrow on the drier in t[...]

94 6) Loosen the tting nut on the inlet water valve, and remove the inlet water valve. Do not lose the packing inside the tting nut. 7) Remove the water supply hose from the inlet water valve. 8) Install the new inlet water valve. 9) Replace the removed parts in the reverse order of which they were removed. 10) Close the water supply line dra[...]

95 N. Removal and Replacement of Control Board 1) Turn off the power supply. ) Remove the front panel and the control box cover. 3) Disconnect the control board connectors from the control board. 4) Remove the control board. 5) Adjust the dip switches on the new control board to the factory default settings. See "II. C.4.a) Default Dip Swit[...]

96 VI. Cleaning and Maintenance WARNING CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after any cleaning or maintenance is done to the unit. Make sure that none have fallen into the dispenser unit/storage bin. A. Cleaning and Sanitizing Instructions Hoshizaki recommends cleaning and sanitizing this icemaker[...]

97 7) Pour the cleaning solution over the extruding head until the evaporator assembly and the reservoir are full and the solution starts to overow into the drain pan. Note: If there is excess scale on the extruding head, ll the evaporator assembly and reservoir as described above, then use a clamp on the reservoir hose between the reservoir [...]

98 11) Wipe down the infrared sensor's lens (located on the bottom of the icemaker) with the cleaning solution. See Fig. 16. Next, rinse the cleaning solution off of the infrared sensor's lens with a clean, damp cloth. Infrared Sensor Infrared Sensor Housing Lens 1) Move the control switch to the "ICE" position, then move the[...]

99 4) Remove the proximity switch from the chute assembly, then remove the chute assembly from the icemaker. 5) Remove the packing at the bottom of the ice chute. Remove the 3 ties and the chute insulation. 6) Remove the  bafes. 7) Remove the plate and the packing from the top of the ice chute, then remove the backup bin control assembly by s[...]

100 position. Replace the panels in their correct positions, then turn on the power supply. Make ice using the solution until the icemaker stops making ice. 8) Turn off the power supply, then remove the front panel. Move the control switch to the "DRAIN" position, then replace the front panel in its correct position. 9) Turn on the power [...]

101 Maintenance Schedule Frequency Area Task Every  Weeks Air Filter(s) Inspect. Wash with warm water and neutral cleaner if dirty. Monthly External Water Filters Check for proper pressure and change if necessary. Icemaker and Dispenser Unit/ Storage Bin Exterior Wipe down with clean, soft cloth. Use a damp cloth containing a neutral cleaner to [...]

10 C. Preparing the Icemaker for Long Storage CAUTION When storing the icemaker for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage. When the icemaker is not used for two or three days under normal conditions, it is sufcient to only move the power switch to the "OFF" position. When s[...]

103 3. On water-cooled model only, rst remove the water from the water-cooled condenser: 1) Make sure the power supply is off, then remove the front and right side panels. ) Close the condenser water supply line shut-off valve. If connected to a closed loop system, also close the condenser return line shut-off valve. 3) Open the condenser wat[...]