Hoshizaki KM-1900SAH Service Manual
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Hoshizaki KM-1900SAH Service Manual

Stackable crescent cuber
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Hoshizaki
Hoshizaki America, Inc.
"A Superior Degree
of Reliability"
www.hoshizaki.com
Stackable Crescent Cuber
Models
KM-1900SAH/3
KM-1900SWH/3
KM-1900SRH/3
SERVICE MANUAL
™
Number: 73171
Issued: 2-9-2009
Revised: 2-25-2009

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  • Page 1 Hoshizaki Hoshizaki America, Inc. Stackable Crescent Cuber Models KM-1900SAH/3 KM-1900SWH/3 KM-1900SRH/3 SERVICE MANUAL “A Superior Degree of Reliability” www.hoshizaki.com ™ Number: 73171 Issued: 2-9-2009 Revised: 2-25-2009...
  • Page 2 Hoshizaki provides this manual primarily to assist qualified service technicians in the service and maintenance of the icemaker. Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance. HOSHIZAKI AMERICA, INC.

  • Page 3: Table Of Contents

    B. Condenser Unit ......................12 1. URC-21F ........................ 12 II. General Information ......................14 A. Construction ........................ 14 1. KM-1900SAH, KM-1900SAH3 (air-cooled) ............. 14 2. KM-1900SWH, KM-1900SWH3 (water-cooled) ............. 15 3. KM-1900SRH, KM-1900SRH3 (remote air-cooled)..........16 B. Sequence of Operation ....................17 1.
  • Page 4 F. Bin Control ........................29 III. Technical Information ...................... 30 A. Water Circuit and Refrigeration Circuit ................ 30 1. KM-1900SAH, KM-1900SAH3 (air-cooled) ............. 30 2. KM-1900SWH, KM-1900SWH3 (water-cooled) ............. 31 3. KM-1900SRH, KM-1900SRH3 (remote air-cooled)..........32 B. Wiring Diagrams ......................33 1.
  • Page 5 K. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.) - Remote Air-Cooled Models ..................62 L. Removal and Replacement of Thermistor ..............63 M. Removal and Replacement of Fan Motor - Air-Cooled and Remote Air-Cooled Models ........................64 N. Removal and Replacement of Inlet Water Valve ............64 O.

  • Page 6: Specifications

    I. Specifications A. Icemaker 1. KM-1900SAH (air-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral 115V) AMPERAGE 14.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP.

  • Page 7: Km-1900Sah3 (Air-Cooled)

    2. KM-1900SAH3 (air-cooled) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 8.59 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) lbs./day ( kg/day ) *1859 (843) 1763 (800)

  • Page 8: Km-1900Swh (Water-Cooled)

    3. KM-1900SWH (water-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral 115V) AMPERAGE 12.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 9: Km-1900Swh3 (Water-Cooled)

    4. KM-1900SWH3 (water-cooled) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 8.4 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) lbs./day ( kg/day ) *1825 (828) 1822 (826)

  • Page 10: Km-1900Srh (Remote Air-Cooled)

    5. KM-1900SRH (remote air-cooled) AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral 115V) AMPERAGE 14.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR.

  • Page 11: Km-1900Srh3 (Remote Air-Cooled)

    6. KM-1900SRH3 (remote air-cooled) AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 11.0 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) lbs./day ( kg/day ) *1965 (891)

  • Page 12: Condenser Unit

    B. Condenser Unit 1. URC-21F...

  • Page 13: Specifications

    SPECIFICATIONS MODEL: URC-21F AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker) FAN MOTOR 115 V Total 2.6FLA 130W EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" (1178 x 398 x 659 mm) DIMENSIONS INCLUDING LEGS (WxDxH) 48-7/16" x 18-1/8" x 40-7/8" (1230 x 460 x 1039 mm) EXTERIOR FINISH Galvanized Steel WEIGHT...

  • Page 14: General Information

    II. General Information A. Construction 1. KM-1900SAH, KM-1900SAH3 (air-cooled) Separators Spray Tubes Low-Side Service Valve High-Side Service Valve Inlet Water Valve Expansion Valves Evaporator Assembly Water Supply Inlet Junction Box Hot Gas Valve Check Valves Cleaning Valve Condenser Control Box...

  • Page 15: Km-1900Swh, Km-1900Swh3 (Water-Cooled)

    2. KM-1900SWH, KM-1900SWH3 (water-cooled) Separators Low-Side Service Valve Spray Tubes High-Side Service Valve Inlet Water Valve Expansion Valves Evaporator Assembly Water Supply Inlet Junction Box Hot Gas Valve Check Valves Cleaning Valve Condenser Check Valve (water) Water Regulating Water Pump Valve Float Switch Drier...

  • Page 16: Km-1900Srh, Km-1900Srh3 (Remote Air-Cooled)

    3. KM-1900SRH, KM-1900SRH3 (remote air-cooled) Separators Spray Tubes Low-Side Service Valve High-Side Service Valve Inlet Water Valve High-Side Liquid Service Valve Evaporator Assembly Water Supply Inlet Hot Gas Valve Junction Boxes Check Valves Expansion Valves Cleaning Valve Control Box Check Valve (water) Water Pump Receiver Tank...

  • Page 17: Sequence Of Operation

    B. Sequence of Operation The steps in the sequence are as outlined below. When power is supplied, the red "POWER OK" LED on the control board comes on. A 5-second delay occurs at startup. Note that the order of the LEDs from the outer edge of the board is 1, 4, 3, 2. 1.

  • Page 18: Normal Harvest Cycle

    5. Normal Harvest Cycle LEDs 1, 4, and 2 are on. Comp and FMR remain energized. FMS de-energizes and the HGV and WV open. As the evaporator warms, the thermistor reaches 48°F (9°C). The control board then receives the thermistor's 3.9 kΩ signal and starts the harvest timer.

  • Page 19: Sequence Flow Chart

    6. Sequence Flow Chart...

  • Page 20: Control Board

    C. Control Board • A Hoshizaki exclusive solid-state control is employed in KM-1900SAH/3, KM-1900SWH/3, and KM-1900SRH/3 Stackable Crescent Cubers. • All models are pretested and factory-adjusted. CAUTION 1. Fragile, handle very carefully. 2. The control board contains integrated circuits, which are susceptible to failure due to static discharge.

  • Page 21: Control Board Layout

    1. Control Board Layout Control Products "E" Control Board "OUTPUT TEST" Button (used to test relays on board) S4 Dip Switch "ALARM RESET" Button Backup Freeze Timer LED Connector K3 Harvest Control (thermistor) Backup Harvest Connector K4 Timer LED Open (not connected) Alarm Buzzer Microprocessor...

  • Page 22: Features

    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 whichever is shorter. b) Harvest Backup Timer and Freeze Timer The harvest backup timer shuts down the icemaker if, for two cycles in a row, the harvest cycle takes more than 20 minutes to complete.

  • Page 23: F) Led Lights And Audible Alarm Safeties

    f) LED Lights and Audible Alarm Safeties The red LED indicates proper control voltage and will remain on unless a control voltage problem occurs. At startup, a 5 second delay occurs while the board conducts an internal timer check. A beep occurs when the control switch is moved to the "OFF" position. The green LEDs 1 through 4 energize and sequence from initial startup as listed in the table below.

  • Page 24: Controls And Adjustments

    The dip switches are factory-adjusted to the following positions: S4 Dip Switch Model KM-1900SAH/3 OFF OFF OFF OFF OFF OFF OFF OFF ON OFF KM-1900SWH/3 OFF OFF OFF OFF OFF OFF OFF OFF ON OFF KM-1900SRH/3 ON OFF ON ON OFF OFF OFF OFF ON OFF S4 Dip Switch Freeze Timer (9 &...

  • Page 25: C) Pump-Out Timer (S4 Dip Switch 3 & 4)

    c) Pump-Out Timer (S4 dip switch 3 & 4) When a freeze cycle is completed, the pump motor stops, and the icemaker resumes operation in 2 seconds. Then, during cycles when a pump out is called for, the pump motor drains the water tank for the time determined by the pump-out timer. The pump-out timer also acts in place of the harvest timer during cycles with a pump out.

  • Page 26: F) Freeze Timer (S4 Dip Switch 9 & 10)

    f) Freeze Timer (S4 dip switch 9 & 10) CAUTION Adjust to proper specification, or the unit may not operate correctly. The freeze timer setting determines the maximum allowed freeze time to prevent possible freeze-up issues. Upon termination of the freeze timer, the control board initiates the harvest cycle.

  • Page 27: Control Board Replacement

    5. Control Board Replacement Before replacing a control board that does not show a visible defect and that you suspect is bad, see "II.C.4. Control Board Check Procedure." Before installing the new control board, adjust the S4 dip switches to the factory default settings. See "II.C.3.a) Default Dip Switch Settings."...

  • Page 28: Float Switch Cleaning

    7) Wipe down the float switch assembly's housing, shaft, float, and retainer rod and clean the inside of the rubber boot and hose with a mixture of 1 part of Hoshizaki "Scale Away" and 25 parts of warm water. Rinse the parts thoroughly with clean water.

  • Page 29: Bin Control

    F. Bin Control CAUTION When the ambient temperature is below 45°F (7°C), 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.

  • Page 30: Technical Information

    III. Technical Information A. Water Circuit and Refrigeration Circuit 1. KM-1900SAH, KM-1900SAH3 (air-cooled)

  • Page 31: Km-1900Swh, Km-1900Swh3 (Water-Cooled)

    2. KM-1900SWH, KM-1900SWH3 (water-cooled)

  • Page 32: Km-1900Srh, Km-1900Srh3 (Remote Air-Cooled)

    3. KM-1900SRH, KM-1900SRH3 (remote air-cooled)

  • Page 33: Wiring Diagrams

    B. Wiring Diagrams 1. KM-1900SAH (air-cooled)

  • Page 34: Km-1900Sah3 (Air-Cooled)

    2. KM-1900SAH3 (air-cooled)

  • Page 35: Km-1900Swh (Water-Cooled), Km-1900Srh (Remote Air-Cooled)

    3. KM-1900SWH (water-cooled), KM-1900SRH (remote air-cooled)

  • Page 36: Km-1900Swh3 (Water-Cooled), Km-1900Srh3 (Remote Air-Cooled)

    4. KM-1900SWH3 (water-cooled), KM-1900SRH3 (remote air-cooled)

  • Page 37: Performance Data

    C. Performance Data 1. KM-1900SAH (air-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1867 1777 1638 80/27 1798 1659 1511 90/32 1777 1560 1413 lbs./day kg./day 100/38 1744 1526 1278 APPROXIMATE ELECTRIC...

  • Page 38: Km-1900Sah3 (Air-Cooled)

    2. KM-1900SAH3 (air-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1859 1763 1633 80/27 1786 1636 1507 90/32 1763 1530 1398 lbs./day kg./day 100/38 1738 1499 1277 APPROXIMATE ELECTRIC 70/21 2510 2539 2611 CONSUMPTION...

  • Page 39: Km-1900Swh (Water-Cooled)

    3. KM-1900SWH (water-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 1876 70/21 1868 1734 80/27 1870 1858 1655 90/32 1868 1850 1673 lbs./day kg./day 100/38 1800 1809 1511 APPROXIMATE ELECTRIC 70/21 2330 2348 2377 CONSUMPTION...

  • Page 40: Km-1900Swh3 (Water-Cooled)

    4. KM-1900SWH3 (water-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1825 1822 1693 80/27 1823 1818 1619 1814 90/32 1822 1642 lbs./day kg./day 100/38 1754 1774 1484 APPROXIMATE ELECTRIC 70/21 2410 2433 2461 CONSUMPTION...

  • Page 41: Km-1900Srh (Remote Air-Cooled)

    5. KM-1900SRH (remote air-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 1915 70/21 1827 1676 80/27 1848 1712 1543 90/32 1827 1616 1451 lbs./day kg./day 100/38 1786 1577 1299 APPROXIMATE ELECTRIC 70/21 2460 2510 2569...

  • Page 42: Km-1900Srh3 (Remote Air-Cooled)

    6. KM-1900SRH3 (remote air-cooled) APPROXIMATE ICE WATER TEMP. (ºF/ºC) AMBIENT TEMP. PRODUCTION PER 24 HR. (ºF/ºC) 50/10 70/21 90/32 70/21 1965 1771 1846 80/27 1817 1516 1781 90/32 1771 1304 1490 lbs./day kg./day 100/38 1901 1347 1660 APPROXIMATE ELECTRIC 2680 2548 70/21 3104...

  • Page 43: Service Diagnosis

    IV. Service Diagnosis A. 10-Minute KM Diagnostic Procedure The 10 minute check out procedure is basically a sequence check which can be used at unit start-up or for system diagnosis. Using this check out procedure will allow you to diagnose electrical system and component failures in approximately 10 minutes under normal operating conditions of 70°F (21°C) or warmer air and 50°F (10°C) or warmer water temperatures.
  • Page 44 5) Freeze Cycle – LED 1 is on. Compressor (and fan motors on remote air-cooled models) remains energized, pump motor, liquid line valve, (and self-contained fan motors on air-cooled models) energize. The inlet water valve and hot gas valve de- energize.

  • Page 45: Diagnostic Charts

    B. Diagnostic Charts 1. No Ice Production Problem Possible Cause Remedy [1] The icemaker will not a) Power Supply 1. Off, blown fuse, or 1. Turn on, replace, or start. tripped breaker. reset. 2. Loose connection. 2. Tighten. 3. Bad contacts. 3.
  • Page 46 Problem Possible Cause Remedy [1] The icemaker will not h) High Pressure Control 6. Refrigerant line or 6. Clean and replace start. (continued) (continued) components plugged. drier. 7. Condenser water 7. Check and get pressure too low or recommended off (water-cooled pressure.
  • Page 47 Problem Possible Cause Remedy [3] Compressor will a) Magnetic Contactor 1. Bad contacts. 1. Check for continuity not start or stops and replace. operating. 2. Coil winding open. 2. Replace. b) Start Capacitor or Run 1. Defective. 1. Replace. Capacitor c) Internal Overload 1.

  • Page 48: Evaporator Is Frozen Up

    Problem Possible Cause Remedy [7] Fan motor will a) Fan Motor 1. Motor winding open. 1. Replace. not start, or is not 2. Bearing worn out. 2. Replace. operating (except 3. Wiring to fan motor. 3. Check for loose water-cooled model). connection or open, and replace.
  • Page 49 Problem Possible Cause Remedy [1]Freeze cycle time is c) Evaporator 1. Scaled up. 1. Clean. too long. (continued) 2. Damaged. 2. Replace. d) Spray Tubes 1. Dirty. 1. Clean. 2. Out of positon. 2. Place in position. e) Water Pump 1.

  • Page 50: Low Ice Production

    Problem Possible Cause Remedy [2]All ice formed on k) Control Board 1. Harvest timer is set 1. Adjust longer, referring evaporator does not too short. to "II.C.3. Controls and fall into bin in harvest Adjustments, b) Harvest cycle. (continued) Timer." 2.

  • Page 51: Abnormal Ice

    Problem Possible Cause Remedy [1] Freeze cycle time is m)Headmaster (C.P.R.) 1. Bypassing. 1. Replace. long. (continued) (remote condenser unit) n) Control Board 1. Float switch 1. Check and reconnect. connection loose (K5). 2. Defective. 2. Replace. See "II.C.4. Control Board Check Procedure."...

  • Page 52: Other

    Problem Possible Cause Remedy [2] Cloudy or irregular a) Evaporator 1. Frozen up. 1. See chart 2. cubes. 2. Scaled up. 2. Clean 3. Damaged. 3. Replace. b) Water System 1. Water supply line too 1. Increase water line size. small;...

  • Page 53: Removal And Replacement Of Components

    V. Removal and Replacement of Components IMPORTANT 1. Ensure all components, fasteners, and thumbscrews are securely in place after the equipment is serviced. 2. The Polyol Ester (POE) oils used in R-404A units can absorb moisture quickly. Therefore it is important to prevent moisture from entering the system when replacing or servicing parts.

  • Page 54: Evacuation And Recharge (R-404A)

    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. Hoshizaki recommends only virgin refrigerant or reclaimed refrigerant which meets ARI Standard 700 (latest edition) be used.

  • Page 55: Removal And Replacement Of Compressor

    B. Removal and Replacement of Compressor IMPORTANT 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. Note: When replacing a compressor with a defective winding, be sure to install the new start capacitor and start relay supplied with the replacement compressor.

  • Page 56: Removal And Replacement Of Expansion Valve

    C. Removal and Replacement of Expansion Valve IMPORTANT Sometimes moisture in the refrigeration 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. Do not replace the drier until after all other repair or replacement has been made.

  • Page 57: Removal And Replacement Of Hot Gas Valve Or Liquid Line Valve

    D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve IMPORTANT 1. Always use a copper tube of the same diameter and length when replacing the hot gas valve lines; otherwise, performance may be affected. 2. Always install a new drier every time the sealed refrigeration system is opened.

  • Page 58: Removal And Replacement Of Evaporator

    E. Removal and Replacement of Evaporator IMPORTANT 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. 2) Remove the panels and the front and top insulation.

  • Page 59: Removal And Replacement Of Condenser - Water-Cooled Models

    6) Install the new condenser assembly, then attach the side frame in its correct position. 7) Remove the drier, then place the new drier in position. 8) Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG. 9) Use an electronic leak detector or soap bubbles to check for leaks.

  • Page 60: Removal And Replacement Of Condenser - Remote Air-Cooled Models

    13) Evacuate the system, and charge it with refrigerant. See the nameplate for the required refrigerant charge. 14) Close the drain valve(s). 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.

  • Page 61: Removal And Replacement Of Water Regulating Valve - Water-Cooled Models

    I. Removal and Replacement of Water Regulating Valve - Water-Cooled Models IMPORTANT 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.

  • Page 62: Adjustment Of Water Regulating Valve - Water-Cooled Models

    J. Adjustment of Water Regulating Valve - Water-Cooled Models 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. 1) Prepare a thermometer to check the condenser drain temperature. Attach a pressure gauge to the high-side line of the system.

  • Page 63: Removal And Replacement Of Thermistor

    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 leak testing.

  • Page 64: Removal And Replacement Of Fan Motor - Air-Cooled And Remote Air-Cooled Models

    11) Connect the thermistor leads through the bushing of the control box to the K3 connector on the control board. CAUTION Do not cut the leads of the thermistor. 12) Replace the control box cover and the panels in their correct positions. 13) Turn on the power supply.

  • Page 65: Removal And Replacement Of Pump Motor

    11) Check for leaks. 12) 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. 2) Remove the front panel and the insulation panel. Cube Guide Separator 3) Drain the water tank by removing the cap...

  • Page 66: Cleaning And Maintenance

    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 required in some existing water conditions. WARNING 1.

  • Page 67: Cleaning Procedure

    1. Cleaning Procedure 1) Dilute 38 fl. oz. (1,124 ml) of Hoshizaki "Scale Away" with 7 gal. (26 l) of warm water. 2) 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 after 3 minutes.

  • Page 68: Sanitizing Procedure - Following Cleaning Procedure

    17) Close the cleaning valve. Note: The icemaker will not operate unless the cleaning valve is completely closed. 18) Replace the front panel in its correct position. 19) Turn on the power supply to fill the water tank with water. 20) Turn off the power supply after 3 minutes.

  • Page 69: Maintenance Instructions

    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.
  • Page 70 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.

This manual is also suitable for:

Km-1900sah/3Km-1900srhKm-1900srh/3Km-1900swhKm-1900swh/3

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