Instruction/ maintenance manual of the product KML "F" SERIES Hoshizaki
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HOSHIZAKI MODULAR CRESCENT CUBER SER VICE MANUAL KML “F” SERIES KML “H” SERIES MODELS NO.: ISSUED: REVISED: AUG. 18, 1999 JAN. 13, 2004 73085.
2 IMPORT ANT Only qualified service technicians should attempt to service or maintain this icemaker. No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual.
3 • Please review this manual. It should be read carefully before the icemaker is serviced or maintenance operations performed. Only qualified service technicians should service and maintain the icemaker. This manual should be made available to the technician prior to service or maintenance.
4 III. TECHNICAL INFORMATION .................................................................................................... .... 4 7 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT .................................................................. 4 7 [a] AIR-COOLED MODELS .
5 [h] KML-450MAF ..................................................................................................................... 7 2 [i] KML-450MWF .................................................................................................
6 I. SPECIFICATIONS 1. KML-250MAH.
7 2. KML-250MWH.
8 3. KML-350MAF.
9 4. KML-350MWF.
10 5. KML-350MAH.
11 6. KML-350MWH (Beginning serial #L00001J, ending Serial #M20060C).
12 7. KML-350MWH (Beginning serial #M30061E).
13 8. KML-450MAF.
14 9. KML-450MWF.
15 10. KML-450MAH.
16 11. KML-450MWH (Beginning Serial #L00001D, ending Serial #M10530B).
17 12. KML-450MWH (Beginning Serial #M20531D).
18 13. KML-600MAF.
19 14. KML-600MWF.
20 15. KML-600MRF.
21 16. KML-600MAH.
22 17. KML-600MWH (Beginning Serial #L00001D, ending Serial #M10115C).
23 18. KML-600MWH (Beginning Serial # M10121E).
24 19. KML-600MRH.
25 20. CONDENSER UNIT URC-7F Unit: mm. (inches).
26 SPECIFICATIONS URC-7F.
27 II. GENERAL INFORMATION 1. CONSTRUCTION [a] KML-250MAH, KML-350MAF, KML-350MAH, KML-450MAF, KML-450MAH Spray Tubes Water Supply Inlet Junction Box Condenser Condenser Fan Motor Control Box Drier Ho.
28 [b] KML-250MWH, KML-350MWF, KML-350MWH, KML-450MWF, KML-450MWH Spray Tubes Water Supply Inlet Junction Box Control Box Drier Hot Gas Valve Compressor Water Regulator Float Switch Water Pump Bin Con.
29 Spray Tubes Water Supply Inlet Junction Box Condenser Condenser Fan Motor Control Box Drier Hot Gas Valve Compressor Float Switch Control Switch Water Pump Expansion Valve [c] KML-600MAF, KML-600MA.
30 [d] KML-600MWF, KML-600MWH Spray Tubes Junction Box Water Regulator Control Box Drier Hot Gas Valve Float Switch Control Switch Water Pump Expansion Valve Compressor Water Supply Inlet Bin Control .
31 [e] KML-600MRF, KML-600MRH Spray Tubes Junction Box Receiver Tank Control Box Drier Hot Gas Valve Float Switch Control Switch Water Pump Expansion Valve Compressor Water Supply Inlet Hot Gas Valve .
32 2. CONTROLLER BOARD [a] SOLID-STATE CONTROL 1) A HOSHIZAKI exclusive solid-state control is employed in Modular Crescent Cubers. 2) A Printed Circuit Board (hereafter called “Controller Board”) includes a stable and high quality control system.
33 2) Defrost Timer The defrost cycle starts when the Float Switch opens and completes the freeze cycle. But the Defrost Timer does not start counting until the Thermistor senses 48°F at the Evaporator outlet.
34 The green LED’s 1-4 represent the corresponding relays and energize and sequence 5 seconds from initial start-up as follows: Sequence Step LED’s on Length: Min. Max. Avg. 1 Minute Fill Cycle LED4 60 sec. Harvest Cycle LED1, 4, & 2 2 min. 20 min.
35 (Control Product s HOS-001A Board) The application switch located between relay X3 & X4 must be set to match the original board application. Place this switch in the ALP position if there is no white wire supplied to the K1 connector. If there is a white wire, place the switch in the C position.
36 [c] SEQUENCE 1st Cycle 1. Unit energized and Control Switch to “ICE” position. Water supply cycle starts. 2. After 1 minute, Defrost cycle starts. 3. Thermistor reads 48° F. Defrost Timer starts counting. IMPORTANT Water Valve opening is limited to 6 minutes.
37 2nd Cycle and after with pump drain IMPORTANT Freeze cycle time is limited to 60 minutes even if Float Switch does not open. 1. Float Switch opens and signals to complete freeze cycle. Drain timer starts counting. 2. Drain timer stops counting. Pump drain is completed 3.
38 IMPORTANT Freeze cycle time is limited to 60 minutes even if Float Switch does not open. 2nd Cycle and after with no pump drain 1. Float Switch opens and signals to complete freeze cycle. 2. Thermistor reads 48° F. Defrost Timer starts counting. IMPORTANT Water Valve opening is limited to 6 minutes.
39 [d] CONTROLS AND ADJUSTMENTS The Dip Switch is factory-adjusted to the following positions: FOR MODELS WITH THERMOSTAT: Switch Nos. 1 and 2: Used for adjustment of the Defrost Timer. The Defrost Timer starts counting when the Thermistor reads a certain temperature at the Evaporator outlet.
40 1) Defrost Control A thermistor (Semiconductor) is used for a defrost control sensor. The resistance varies depending on the Suction Line temperatures. The Thermistor detects the temperature of the Evaporator outlet to start the Defrost Timer. No adjustment is required.
41 3) Drain Timer The Drain Timer is factory-adjusted, and no adjustment is required. SETTING TIME Dip Switch Dip Switch No. 3 No. 4 T1 T2 OFF OFF 10 seconds 150 seconds ON OFF 10 seconds 180 seconds .
42 6) Bin Control MODELS WITH THERMOSTAT CAUTION When the ambient temperature is below 45°F, the Bin Control Thermostat operates to stop 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 filled with ice.
43 (iv) After Step (iii), de-energize the unit and confirm that the Defrost Timer is in the minimum position. Disconnect the resistor from the Controller Board, and ener- gize the unit. After the 1 minute water supply cycle, the defrost cycle starts. Reconnect a 1.
44 3. SWITCHES Two control switches are used to control operation in the KML Series Modular Crescent Cubers. These switches are referred to as the “Control Switch” and the “Service Switch.” [a] CONTROL SWITCH The Control Switch is located on the lower left section of the control box when facing the front of the machine.
45 4. MECHANICAL BIN CONTROL (THESE INSTRUCTIONS NOT APPLICABLE TO MODELS WITH THERMOSTAT) [a] PROXIMITY SWITCH 1) This machine uses a lever-actuated proximity switch (hereafter called “mechanical bin control”) to control the ice level in the storage bin.
46 [c] TROUBLESHOOTING (MECHANICAL BIN CONTROL ONLY) 1) Machine will not start (i) Move dip switch No. 7 to the “OFF” position. If the machine starts up within a few seconds, the bin control is the likely problem. If the machine does not start up, refer to Section “IV.
47 III. TECHNICAL INFORMA TION 1. WATER CIRCUIT AND REFRIGERANT CIRCUIT [ a ] KML-250MAH KML-350MAF, KML-350MAH KML-450MAF, KML-450MAH KML-600MAF, KML-600MAH.
48 [ b ] KML-250MWH KML-350MWF, KML-350MWH KML-450MWF, KML-450MWH KML-600MWF, KML-600MWH.
49 [c] KML-600MRF, KML-600MRH.
50 2. WIRING DIAGRAMS [a] KML-250MAH (Beginning Serial #L00001E, ending Serial #M10460F; KML-250MWH (Beginning Serial #L10001K, ending Serial #M10090D) Note: KML-250MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG KML-250MWH Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
51 Note: KML-250MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG [b] KML-250MAH (Beginning Serial #M20461G); KML-250MWH (Beginning Serial #M20091G) KML-250MWH Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
52 [c] KML-350MAF and KML-350MWF Note: KML-350MAF Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG KML-350MWF Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
53 [d] KML-350MAH (Beginning Serial #L00001L, ending Serial #M10290F); KML-350MWH (Beginning Serial #L00001J, ending Serial #M30080F) Note: KML-350MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG KML-350MWH Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
54 [e] KML-350MAH (Beginning Serial #M20291G); KML-350MWH (Beginning Serial #M40081G) Note: KML-350MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.
55 Note: KML-450MAF Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG [f] KML-450MAF and KML-450MWF KML-450MWF Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
56 [g] KML-450MAH (Beginning Serial #L00101C, ending Serial #L00950G); KML-450MWH (Beginning Serial #L00001D, ending Serial #L00200G) Note: KML-450MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG KML-450MWH Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
57 [h] KML-450MAH (Beginning Serial #L20951H, ending Serial #M12770F); KML-450MWH (Beginning Serial #L10201H, ending Serial #M20710F) Note: KML-450MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.3 PSIG KML-450MWH Pressure Switch Cut-out 3 84 PSIG Cut-in 284.
58 [i] KML-450MAH (Beginning Serial #M22771G); KML-450MWH (Beginning Serial #M30711G) Note: KML-450MAH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.
59 +21.3 - 0 +21.3 - 0 Note: KML-600MWF Pressure Switch Cut-out 3 84 PSIG Cut-in 284.5 ± 21.3 PSIG KML-600MAF, MRF Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.
60 [k] KML-600MAH (Beginning Serial #L00001F, ending Serial #L00070F); KML-600MWH (Beginning Serial #L00001D, ending Serial #L00080E); KML-600MRH (Beginning Serial #L00001F, ending Serial #L00050F) Note: KML-600MWH Pressure Switch Cut- o u t 384 PSIG Cut-in 284.
61 [l] KML-600MAH (Beginning Serial #L10071H, ending Serial #M10460G); KML-600MWH (Beginning Serial #L10081K, ending Serial #M10140E); KML-600MRH (Beginning Serial #L10051H, ending Serial #M10350E) Note: KML-600MWH Pressure Switch Cut-out 384 PSIG Cut-in 284.
62 [m] KML-600MAH (Beginning Serial #M2_ _ _ _ _); KML-600MWH (Beginning Serial #M20141F); KML-600MRH (Beginning Serial #M20331E) Note: KML-600MWH Pressure Switch Cut-out 384 PSIG Cut-in 284.5 ± 21.3 PSIG KML-600MAH, MRH Pressure Switch Cut-out 412.5 PSIG Cut-in 327 ± 21.
63 * * 3. TIMING CHART Control Sw. in ICE Bin Thermo- stat ON Pressure Sw. ON Overheat Protect Reset Hi Temp Mid Temp Lo Temp Too Lo Temp Normal Too Hi Temp Lo Water Max. Min. 60 min 5 min Min. Max. Max. 2 min 6 min 6 min Max. 20 min Time Up (60 sec) If Float Sw.
64 To Stand-by Cycle (When Control Sw. is turned OFF, Pressure Sw. is OFF, Thermistor Temp. exceeds t1, or Bin Control is in full position) To Freeze Cycle From Freeze Cycle Control Sw. in WASH Max. 20 min *1 The Pump Motor waits for 2 seconds before starting a drain cycle.
65 4. PERFORMANCE DATA [a] KML-250MAH.
66 [b] KML-250MWH.
67 [c] KML-350MAF.
68 [d] KML-350MWF.
69 [e] KML-350MAH.
70 [f] KML-350MWH (Serial #L00001J through M20060C).
71 [g] KML-350MWH (Beginning Serial #M30061E).
72 [h] KML-450MAF.
73 [i] KML-450MWF.
74 [j] KML-450MAH.
75 [k] KML-450MWH (Serial #L00001D through M10530B).
76 [l] KML-450MWH (Beginning Serial #M20531D).
77 [m] KML-600MAF.
78 [n] KML-600MWF.
79 [o] KML-600MRF.
80 [p] KML-600MAH.
81 [q] KML-600MWH (Serial #L00001D through Serial #M10115C).
82 [r] KML-600MWH (Beginning Serial #M10121E).
83 [s] KML-600MRH.
84 PROBLEM POSSIBLE CAUSE REMEDY [1] The icemaker a) Power Supply 1. “OFF” position. 1. Move to “ON” position will not start 2. Loose connections. 2. Tighten 3. Bad contacts. 3. Check for continuity and replace. 4. Voltage too high. 4. Check and get recommended voltage.
85 PROBLEM POSSIBLE CAUSE REMEDY l) Controller Board 1. Defective 1. See “II.2[e] CHECKING CONTROLLER BOARD.” [2] Water a) Float switch 1. Connector disconnected. 1. Place in position. continues to 2. Leads opened or defective 2. Check and replace.
86 PROBLEM POSSIBLE CAUSE REMEDY [4] Water a) Water Solenoid 1. Diaphragm does not close. 1. Check for water leaks continues to Valve with icemaker off. be supplied in b) Controller Board 1. Defective. 1. See “II.2.[e] CHECKING freeze cycle. CONTROLLER BOARD.
87 3. LOW ICE PRODUCTION PROBLEM POSSIBLE CAUSE REMEDY [1] Freeze cycle a) Float Switch 1. Leads short-circuit or 1. Check and replace. time is too defective switch. long. 2. Float does not move freely. 2. Clean or replace. b) Water Solenoid 1. Diaphragm does not close.
88 PROBLEM POSSIBLE CAUSE REMEDY [1] Icemaker will a) Bin Control 1. Set too cold. 1. Adjust warmer. not stop when Thermostat 2. Defective. 2. Replace. bin is filled with ice. [2] Abnormal a) Pump Motor 1. Bearings worn out. 1. Replace. noise b) Fan Motor 1.
89 V. REMOVAL AND REPLACEMENT OF COMPONENTS IMPORTANT Ensure all components, fasteners and thumbscrews are securely in place after the equipment is serviced.
90 5) Disconnect the Vacuum Pump, and attach a Refrigerant Service Cylinder to the High-side line. Remember to loosen the connection, and purge the air from the Hose. See the Nameplate for the required refrigerant charge. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard No.
91 3. REMOV AL AND REPLACEMENT OF COMPRESSOR IMPORT ANT 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.
92 4. REMOV AL AND REPLACEMENT OF DRIER IMPORT ANT 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 supply. 2) Remove the panels.
93 5. REMOV AL AND REPLACEMENT OF EXP ANSION V AL VE IMPORT ANT Sometimes moisture in the refrigerant circuit exceeds the Drier capacity and freezes up at the Expansion Valve. Always install a new Drier every time the sealed refrigeration system is opened.
94 6. REMOV AL AND REPLACEMENT OF HOT GAS V AL VE AND LINE VA LV E CAUTION Always use a copper tube of the same diameter and length when replacing the hot gas lines; otherwise the performance may be reduced. IMPORT ANT Always install a new Drier every time the sealed refrigeration system is opened.
95 10) Cut the leads of the Solenoid allowing enough lead length to reconnect using closed end connectors. 11) Connect the new Solenoid leads. 12) Attach the Solenoid to the valve body, and secure it with a screw. 13) Replace the panels in their correct positions.
96 7. REMOV AL AND REPLACEMENT OF EV APORA TO R IMPORT ANT Always install a new Drier every time the sealed refrigeration system is opened. Do not replace the Drier until after all other repairs or replacement have been made. 1) Turn off the power supply.
97 8. REMOV AL AND REPLACEMENT OF W A TER REGULA TING V AL VE - W A TER-COOLED MODEL ONL Y IMPORT ANT 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.
98 9. ADJUSTMENT OF W A TER REGULA TING V AL VE - W A TER-COOLED MODEL ONL Y The Water Regulating Valve (also called “WATER REGULATOR”) is factory-adjusted. No adjustment is required under normal use. Adjust the Water Regulator, if necessary, using the following procedures.
99 10. REMOV AL AND REPLACEMENT OF CONDENSING PRESSURE REGULA T OR (C.P .R.) - REMOTE AIR-COOLED MODEL ONL Y IMPORT ANT 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.
100 1 1. REMOV AL AND REPLACEMENT OF THERMISTOR CAUTION 1. Fragile, handle very carefully. 2. Always use a recommended sealant (High Thermal Conductive Type), Model KE4560RTV manufactured by SHINETSU SILICONE, Part Code 60Y000-11, or Part Code 4A0683-01 or equivalent.
101 10) Secure the insulation using the Plastic Cable Ties. 11) Connect the Thermistor leads through the bushing of the Control Box to the K3 Connector on the Controller Board. Note: Do not cut the leads of the Thermistor while installing it. 12) Replace the Control Box Cover and the panels in their correct positions.
102 13. REMOV AL AND REPLACEMENT OF W A TER V AL VE 1) Turn off the power supply. 2) Close the Water Supply Line Shut-off Valve. 3) Remove the Front Panel. 4) Remove the Valve Outlet Tubing by releasing the Clamp. 5) Remove the Bracket from the unit. 6) Remove the Fitting Nut and Water Valve.
103 15. REMOV AL AND REPLACEMENT OF SPRA Y TUBES 1) Turn off the power supply. 2) Remove the Front Panel and the Insulation Panel. 3) Remove the Rubber Hoses from the Spray Tubes (Water Supply Pipe). 4) Release the Clamps, and disconnect the Rubber Hoses.
104 VI. MAINTENANCE AND CLEANING INSTRUCTIONS IMPORTANT Ensure all components, fasteners and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment.
105 [2] Remove the water from the potable water supply line: 1) Turn off the power supply and remove the Front Panel. 2) Move the Control Switch, on the Control Box, to the “OFF” position. 3) Wait 3 minutes. 4) Close the Potable Water Supply Line Shut-off Valve and open the Potable Water Supply Line Drain Valve.
106 M O D E L W AT E R " S C AL E AW AY " W AT E R S AN I T I Z E R gal. f l. oz . gal. f l. oz . K M L- 25 0 2 10.5 2 1 K M L- 35 0 2 10.5 2 1 K M L- 45 0 2 10.
107 5) Place the Control Switch in the “SERVICE” position. Then place the Service Switch in the “DRAIN” position. 6) Replace the Front Panel and turn on the power supply for 2 minutes. 7) Turn off the power supply. 8) Remove the Front Panel and then remove the Insulation Panel by lifting up the panel slightly and pulling it toward you.
108 3. SANITIZING PROCEDURE - Following Cleaning Procedure 1) Dilute a 5.25% Sodium Hypochlorite solution (chlorine bleach) with water (Add 1.0 fl. oz. to 2 gal. of water). 2) Remove the Insulation Panel. 3) Pour the sanitizing solution into the Water Tank.
109 4. MAINTENANCE IMPORT ANT 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 and soft cloth.
An important point after buying a device Hoshizaki KML "F" SERIES (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Hoshizaki KML "F" SERIES yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Hoshizaki KML "F" SERIES - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Hoshizaki KML "F" SERIES you will learn all the available features of the product, as well as information on its operation. The information that you get Hoshizaki KML "F" SERIES will certainly help you make a decision on the purchase.
If you already are a holder of Hoshizaki KML "F" SERIES, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Hoshizaki KML "F" SERIES.
However, one of the most important roles played by the user manual is to help in solving problems with Hoshizaki KML "F" SERIES. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Hoshizaki KML "F" SERIES along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
