Hoshizaki KM-1301SAH/3 manual

Hoshizaki “A Superior Degree of Reliability” www .hoshizaki.com Models KM-1301SAH/3 KM-1301SWH/3 KM-1301SRH/3 Stackable Crescent Cuber Hoshizaki America, Inc. S E RV I C E M A N U A L ™ Number: 73169 Issued:1-21-2009 Revised: 8-6-2009[...]

 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 CONTENTS Important Safety Information ................................................................................................. 6 I. Specications ..................................................................................................................... 7 A. Icemaker ...........................................................[...]

4 e) Harvest Pump Timer (S4 dip switch 7) ............................................................ 7 f) Factory Use (S4 dip switch 8) ........................................................................... 7 g) Freeze Timer (S4 dip switch 9 & 10) ............................................................... 7 h) Float Switch [...]

5 V. Removal and Replacement of Components ................................................................... 65 A. Service for Refrigerant Lines ...................................................................................... 65 1. Refrigerant Recovery .........................................................................................[...]

6 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[...]

7 I. Specications A. Icemaker 1. KM-1301SAH (air-cooled) Note: We reserve the right to make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 12.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION[...]

8 Note: We reserve the right to make changes in specications and design without prior notice. 2. KM-1301SAH3 (air-cooled) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 9.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs.[...]

9 3. KM-1301SWH (water-cooled) Note: We reserve the right to make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 8.2 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER[...]

10 4. KM-1301SWH3 (water-cooled) Note: We reserve the right to make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 6.1 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 l[...]

11 5. KM-1301SRH (remote air-cooled) Note: We reserve the right to make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral for 115V) AMPERAGE 13.5A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°[...]

1 6. KM-1301SRH3 (remote air-cooled) Note: We reserve the right to make changes in specications and design without prior notice. AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 10.7A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 [...]

13 B. Condenser Unit 1. URC-14F Unit: inches (mm)[...]

14 SPECIFICATIONS MODEL: URC-14F AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR 115 V Total 2.6FLA 130W EXTERIOR DIMENSIONS (WxDxH) 35-11/16" x 15-11/16" x 21-15/16" (907.2 x 398 x 557.8 mm) DIMENSIONS INCLUDING LEGS (WxDxH) 37-13/16" x 18-1/8" x 36-15/16" (960 x 460 x 937.8 mm) EXTERIOR FINISH Galvanize[...]

15 II. General Information A. Construction 1. KM-1301SAH, KM-1301SAH3 (air-cooled) Evaporator Assembly Spray Tubes Inlet Water Valve Water Supply Inlet Hot Gas Valve Junction Box Air-Cooled Condenser Check Valves Control Box Drier Transformer Box (KM-1301SAH3) Control Switch Bin Control Thermostat Compressor Cleaning Valve Float Switch Water Pump C[...]

16 2. KM-1301SWH, KM-1301SWH3 (water-cooled) Evaporator Assembly Spray Tubes Inlet Water Valve Water Supply Inlet Hot Gas Valve Junction Box Water Regulating Valve Check Valves Control Box Liquid Line Valve Drier Transformer Box (KM-1301SWH3) Control Switch Bin Control Thermostat Compressor Cleaning Valve Float Switch Water Pump Check Valve (water)[...]

17 3. KM-1301SRH, KM-1301SRH3 (remote air-cooled) Evaporator Assembly Spray Tubes Inlet Water Valve Water Supply Inlet Hot Gas Valve Junction Boxes Receiver Tank Check Valves Control Box Liquid Line Valve Drier Transformer Box (KM-1301SRH3) Control Switch Bin Control Thermostat Compressor Cleaning Valve Float Switch Water Pump Check Valve (water) E[...]

18 B. Sequence of Operation IMPORTANT This unit utilizes a thermostatic bin control. For operation, the K4 jumper (4A4883G01) must be in place on the control board RED K4 connector. 1. Sequence Cycles and Shutdown The steps in the sequence are as outlined below. When power is supplied, CB red "POWER OK" LED and green "BC CLOSED"[...]

19 de-energize. For the rst 5 minutes, CB will not accept a signal from F/S. This minimum 5-minute freeze time is short cycle protection for Comp. At the end of 5 minutes, F/S assumes control. As ice builds on the evaporator, the water level in the tank lowers. The freeze cycle continues until F/S opens and terminates the cycle. There is a 15 se[...]

0 2. Sequence Flow Chart • WV time: 6 min. or the length of harvest minus 0 or 50 sec. (S4 dip switch 7), whichever is shorter. DO NOT ADJUST S4 dip switch 7 on this model. • Maximum harvest time: 0 min. F/S check 1 to 3-min. timer in control (S4 dip switch 1 & ) Legend: BC –bin control Comp –compressor FM –fan motor FMR –f[...]

1 C. Control Board • A Hoshizaki exclusive solid-state control board is employed in KM-1301SAH/3, KM-1301SWH/3, and KM-1301SRH/3, Stackable Crescent Cubers. • All models are pretested and factory set. CAUTION 1. The control board is fragile; handle very carefully. . The control board contains integrated circuits, which are susceptible to [...]

 1. Control Board Layout Control Board Part Number A379-01 "G" Control Board "ALARM RESET" Button "OUTPUT TEST" Button (used to test relays on control board) WHITE K3 Connector Harvest Control (thermistor) RED K4 Connector K4 Jumper (4A4883G01 thermostatic bin control application) or Mechanical Bin Control [...]

3 2. Features a) Maximum Water Supply Period - 6 minutes The inlet water valve will be open during harvest for 6 minutes or the length of harvest minus 0 or 50 seconds (harvest pump timer (S4 dip switch 7)), whichever is shorter. For details, see "II.C.3.e) Harvest Pump Timer (S4 dip switch 7)." b) Harvest Backup Timer and Freeze Timer[...]

4 f) LED Lights and Audible Alarm Safeties At startup, a 5-second delay occurs while the control board conducts an internal timer check. A beep occurs when the control switch is moved to the "ICE" position. The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs. The green LEDs 1 through [...]

5 3. Controls and Adjustments CAUTION Dip switches are factory set. Failure to maintain factory settings may adversely affect performance and warranty coverage. For more information, contact Hoshizaki Technical Support at 1-800-33-1940. a) Default Dip Switch Settings The dip switches are factory set to the following positions: S4 Dip Switch S[...]

6 c) Pump-Out Timer (S4 dip switch 3 & 4) CAUTION Do not adjust S4 dip switch 3 off and S4 dip switch 4 on for this model. Otherwise, pump motor does not rotate in the pump-out direction. When a pump-out is called for, the pump motor stops after the preceding freeze cycle. The pump motor restarts  seconds later in the reverse direction, t[...]

7 e) Harvest Pump Timer (S4 dip switch 7) CAUTION Factory set for proper operation. Do not adjust. Adjustment outside of the factory default setting may result in damage to the icemaker. Depending on the harvest pump timer setting, the pump motor energizes and runs the last 0 or 50 seconds of harvest. When the pump is on, water circulates over t[...]

8 h) Float Switch Control (S5 dip switch 1) CAUTION Do not adjust. This must be left in the factory default position or the unit will not operate correctly. Factory set. S5 dip switch 1 allows for single or double oat switch applications. The KM-1301SAH/3, KM1301SWH/3, and KM-1301SRH/3 use a single oat switch. i) Refill Counter (S5 dip swi[...]

9 D. Bin Control CAUTION When the ambient temperature is below 45°F (7°C), the thermostatic bin control switch opens and shuts down the icemaker even if the ice storage bin is empty. When the thermostat is set in the prohibited range, the icemaker operates continuously even if the ice storage bin is lled with ice. Setting in the prohibited [...]

30 III. Technical Information A. Water Circuit and Refrigeration Circuit 1. KM-1301SAH, KM-1301SAH3 (air-cooled) Water Supply Cleaning Valve Float Switch Drain Check Valve Expansion Valves Compressor Hot Gas Valve Check Valves High Pressure Switch Strainer Drier Condenser Evaporator Service Valve Discharge Line Suction Line Water Pump Thermistor Sp[...]

31 2. KM-1301SWH, KM-1301SWH3 (water-cooled) Water Supply Cleaning Valve Float Switch Drain Check Valve Expansion Valves Compressor Hot Gas Valve Check Valves High Pressure Switch Strainer Drier Condenser Evaporator Service Valve Discharge Line Suction Line Water Pump Thermistor Spray Tubes Inlet Water Valve Pump-Out Water Tank Service Valve Refrig[...]

3 3. KM-1301SRH, KM-1301SRH3 (remote air-cooled) Water Supply Cleaning Valve Float Switch Drain Check Valve Expansion Valves Compressor Hot Gas Valve Check Valves High Pressure Switch Strainer Drier Condenser Evaporator Service Valve Discharge Line Suction Line Water Pump Thermistor Spray Tubes Inlet Water Valve Freeze/Harvest Pump Timer Pump-Ou[...]

33 B. Wiring Diagrams 1. Auxiliary Code T-0, U-0 a) KM-1301SAH (air-cooled) Auxiliary Code T-0, U-0 Transformer Output 10.5V at 115V * * High Pressure Switch Cut-out 41± 1 PSIG Cut-in 37±1 PSIG 0[...]

34 b) KM-1301SWH (water-cooled) Auxiliary Code T-0, U-0 * Transformer Output 10.5V at 115V * High Pressure Switch Cut-out 384± 1 PSIG Cut-in 84±1 PSIG 0[...]

35 c) KM-1301SRH (remote air-cooled) Auxiliary Code T-0, U-0 Transformer Output 10.5V at 115V * High Pressure Switch Cut-out 41± 1 PSIG Cut-in 37±1 PSIG 0 *[...]

36 d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled) Auxiliary Code T-0, U-0 Transformer Output 10.5V at 115V * * High Pressure Switch Air-Cooled Model Water-Cooled Model Cut-out 41± 1 PSIG 384± 1 PSIG Cut-in 37±1 PSIG 84±1 PSIG 0 0[...]

37 e) KM-1301SRH3 (remote air-cooled) Auxiliary Code T-0, U-0 * Transformer Output 10.5V at 115V * High Pressure Switch Cut-out 41± 1 PSIG Cut-in 37±1 PSIG 0[...]

38 2. Auxiliary Code U-1 and Later a) KM-1301SAH (air-cooled) Auxiliary Code U-1 and Later Transformer Output 10.5V at 115V * * High Pressure Switch Cut-out 41± 1 PSIG Cut-in 37±1 PSIG 0[...]

39 b) KM-1301SWH (water-cooled) Auxiliary Code U-1 and Later * Transformer Output 10.5V at 115V * High Pressure Switch Cut-out 384± 1 PSIG Cut-in 84±1 PSIG 0[...]

40 c) KM-1301SRH (remote air-cooled) Auxiliary Code U-1 and Later * Transformer Output 10.5V at 115V * High Pressure Switch Cut-out 41± 1 PSIG Cut-in 37±1 PSIG 0[...]

41 d) KM-1301SAH3 (air-cooled) and KM-1301SWH3 (water-cooled) Auxiliary Code U-1 and Later * Transformer Output 10.5V at 115V * High Pressure Switch Air-Cooled Model Water-Cooled Model Cut-out 41± 1 PSIG 384± 1 PSIG Cut-in 37±1 PSIG 84±1 PSIG 0 0[...]

4 e) KM-1301SRH3 (remote air-cooled) Auxiliary Code U-1 and Later * Transformer Output 10.5V at 115V * High Pressure Switch Cut-out 41± 1 PSIG Cut-in 37±1 PSIG 0[...]

43 C. Performance Data 1. KM-1301SAH (air-cooled) Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. . We reserve the right to make changes in specications and design without prior notice. 70/21 1329 603 1281 581 1188 539 80/27 1292 586 1217 552 1109 503 90/32 1281 581 [...]

44 2. KM-1301SAH3 (air-cooled) Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. . We reserve the right to make changes in specications and design without prior notice. 70/21 1298 589 1257 570 1162 527 80/27 1267 575 1204 546 1086 493 90/32 1257 570 1159 526 1049 476 l[...]

45 3. KM-1301SWH (water-cooled) Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. . We reserve the right to make changes in specications and design without prior notice. 70/21 1318 598 1319 599 1249 567 80/27 1319 598 1321 599 1211 549 90/32 1319 599 1323 600 1228 557 [...]

46 4. KM-1301SWH3 (water-cooled) Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. . We reserve the right to make changes in specications and design without prior notice. 70/21 1333 605 1323 600 1246 565 80/27 1326 601 1311 594 1198 544 90/32 1323 600 1300 590 1201 545[...]

47 Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. . We reserve the right to make changes in specications and design without prior notice. 5. KM-1301SRH (remote air-cooled) 70/21 1353 614 1315 596 1219 553 80/27 1324 600 1264 573 1144 519 90/32 1315 596 1222 554 1110[...]

48 6. KM-1301SRH3 (remote air-cooled) Note: 1. Pressure data is recorded at 5 minutes into freezing cycle. The data not in bold should be used for reference only. . We reserve the right to make changes in specications and design without prior notice. 70/21 1339 607 1297 589 1203 546 80/27 1307 593 1243 564 1127 511 90/32 1297 589 1197 543 108[...]

49 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. [...]

50 3) 1-Minute Fill Cycle – LED 4 is on. WV and X relay (auxiliary code T-0, U-0), X11 relay (auxiliary code U-1 and later) energize and the 1-minute ll cycle begins. After 1 minute, CB checks for a closed F/S. If F/S is closed, the harvest cycle begins. If closed, continue to step 4. If open, WV remains energized through additional 1-minut[...]

51 5) Freeze Cycle – LED 1 is on. Comp and FMR remain energized, PM energizes or remains energized depending on harvest pump timer (S4 dip switch 7) setting. FM and LLV energize. HGV, and X1 relay (auxiliary code T-0, U-0), X10 relay (auxiliary code U-1 and later) de-energize. The unit is held in freeze by a 5-minute short cycle protection timer [...]

5 Diagnosis: If PM does not reverse, check to see if CB S4 and S5 dip switch settings are in the factory default position. If S4 dip switch 3 and 4 are adjusted to 3 off and 4 on, WV and harvest pump timer relays energize. Once these relays energize, the pump motor rotates in the freeze cycle rotation. See "III.B. Wiring Diagrams." Che[...]

53 B. Control Board Check Before replacing a control board that does not show a visible defect and that you suspect is bad, always conduct the following check procedure. This procedure will help you verify your diagnosis. Alarm Reset: If the control board is in alarm (beeping), press the "ALARM RESET" button on the control board with powe[...]

54 C. Bin Control Check To check the thermostatic bin control, follow the steps below. CAUTION When the ambient temperature is below 45°F (7°C), the thermostatic bin control switch opens and shuts down the icemaker even if the ice storage bin is empty. When the thermostat is set in the prohibited range, the icemaker operates continuously even if [...]

55 8) Reconnect the black oat switch connector to the control board BLACK K5 connector, then replace the control box cover in its correct position. 9) Move the control switch to the "ICE" position. Replace the insulation panel and the front panel in their correct positions, then turn on the power supply. After 1 minute, the 1-minute ?[...]

56 7) Wipe down the oat switch assembly's housing, shaft, oat, and retainer rod with a mixture of 1 part of recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics Laboratory, Inc.) and 5 parts of warm water. Clean the inside of the rubber boot and hose with the cleaning solution. Rinse the parts thor[...]

57 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[...]

58 Problem Possible Cause Remedy [1] The icemaker will not start. (continued) h) Transformer 1. Coil winding open or shorted. 1. Replace. i) Wiring to Control Board 1. Loose connections or open. 1. Check for continuity and replace. j) Interlock Switch (Cleaning Valve) 1. Open position. 1. Move to closed position. . Bad contacts. . Check for c[...]

59 Problem Possible Cause Remedy [3] Compressor will not start or stops operating. a) Magnetic Contactor 1. Bad contacts. 1. Check for continuity and replace. . Coil winding open. . Replace. b) Start Capacitor or Run Capacitor 1. Defective. 1. Replace. c) Internal Overload Protector Open (check 1 through 3 to the right and d through f below) [...]

60 Problem Possible Cause Remedy [7] Fan motor will not start, or is not operating (except water-cooled model). a) Fan Motor 1. Motor winding open. 1. Replace. . Bearing worn out. . Replace. 3. Wiring to fan motor. 3. Check for loose connection or open, and replace. 4. Defective capacitor. 4. Replace. 5. Fan blade bound. 5. Check and replace.[...]

61 Problem Possible Cause Remedy [1] Freeze cycle time is too long. (continued) f) Thermistor 1. Loose or disconnected. 1. Reattach or connect. See "IV.E. Thermistor Check." g) Refrigerant Charge 1. Low charge. 1. Check for leaks. Recover, repair, evacuate, and recharge. h) Expansion Valve 1. Bulb loose. 1. Secure bulb. . Operating err[...]

6 Problem Possible Cause Remedy [3] Other. a) Ice Cube Guide 1. Out of position. 1. Place in position. b) Thermostatic Bin Control 1. Bulb out of position. 1. Place in position. . Bad contacts. . See "IV.C. Bin Control Check." 3. Low Ice Production Problem Possible Cause Remedy [1] Freeze cycle time is long. a) Inlet Water Valve [...]

63 Problem Possible Cause Remedy [] Harvest cycle time is long. a) Water Supply 1. Water temperature too cold. 1. Increase temperature. b) Thermistor 1. Out of position or defective. 1. Reattach and secure. See "V.L. Removal and Replacement of Thermistor" and "IV.E. Thermistor Check." c) Control Board 1. Not reading thermisto[...]

64 Problem Possible Cause Remedy [] Cloudy or irregular cubes. a) Evaporator 1. Frozen up. 1. See chart . . Scaled up. . Clean 3. Damaged. 3. Replace. b) Water System 1. Water supply line too small; requires 1/" OD line dedicated per machine. 1. Increase water line size. . Water lter clogged or ow rate too small. . R[...]

65 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 control switch to the "OFF" position and turn off the power supply before servicing. 3. CHOKING HAZARD: Ensure all compo[...]

66 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[...]

67 3) Allow the vacuum pump to pull down to a 9.9" Hg vacuum. Evacuating period depends on pump capacity. 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 [...]

68 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) Remove the drier, then place the new drier in position. 11) Remove the plugs from the suction, discharge, and process pipes. 1[...]

69 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. For air-co[...]

70 10) 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. 11) Cut the leads of the solenoid allowing enough lead length to reconnect using closed end connectors. 1) Connect the n[...]

71 F. 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[...]

7 G. 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, p[...]

73 H. Removal and Replacement of Remote 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[...]

74 I. 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.[...]

75 18) Check for water leaks. 19) Replace the panels in their correct positions. 0) Turn on the power supply. J. Adjustment of Water Regulating Valve (water-cooled model) The water regulating valve (also called "water regulator") is factory set, and generally no adjustment is required. However, when necessary, adjust the water regulato[...]

76 8) Braze all ttings with nitrogen gas owing at a pressure of 3 to 4 PSIG. 9) 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 [...]

77 11) Connect the white thermistor connector through the bushing of the control box to the control board WHITE K3 connector. CAUTION Do not cut the leads of the thermistor. 1) Replace the control box cover and the panels in their correct positions. 13) Turn on the power supply. M. Removal and Replacement of Fan Motor (air-cooled and remote air-[...]

78 10) Turn on the power supply. 11) Check for leaks. 1) Replace the front panel in its correct position. 13) Turn on the power supply. O. Removal and Replacement of Pump Motor 1) Turn off the power supply. ) Remove the front panel and the insulation panel. 3) Drain the water tank by removing the cap located on the front bottom part of the ic[...]

79 P. Removal and Replacement of Control Board When replacing a control board follow the precautions below. CAUTION 1. The control board is fragile; handle very carefully. . The control board contains integrated circuits, which are susceptible to failure due to static discharge. It is especially important to touch the metal part of the unit befo[...]

80 CLOSED POSITION OPEN POSITION VI. Cleaning and Maintenance IMPORTANT Ensure all components, fasteners, and thumbscrews are securely in place after any cleaning or maintenance is done to the equipment. A. Cleaning and Sanitizing Instructions Hoshizaki recommends cleaning this icemaker at least once a year. More frequent cleaning, however, may be [...]

81 1. Cleaning Procedure 1) Dilute 7 . oz. (800 ml) of recommended cleaner Hoshizaki "Scale Away" or "LIME-A-WAY" (Economics Laboratory, Inc.) with 5 gal. (19 l) of warm water. ) Remove all ice from the evaporator and the storage bin. Note: To remove cubes on the evaporator, turn off the power supply and turn it on afte[...]

8 18) Replace the front panel in its correct position. 19) Turn on the power supply to ll the water tank with water. 0) Turn off the power supply after 3 minutes. 1) Remove the front panel and fully open the cleaning valve. ) Move the control switch to the "WASH" position. 3) Replace the front panel in its correct pos[...]

83 B. Maintenance Instructions IMPORTANT This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker. 1. Stainless Steel Exterior To prevent corrosion, wipe the exterior occasionally with a clean, soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt build up. [...]

84 5) Open the water regulating valve by using a screwdriver to pry up on the spring retainer underneath the spring. While holding the valve open, blow out the condenser using the compressed air or carbon dioxide supply until water stops coming out. 6) Close the drain valve(s) and replace the right side panel in its correct position. 2. Remove the [...]