DCS RF151 Service Manual
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DCS RF151 Service Manual

Dcs rf151 ice maker
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ICE MAkEr

SErvICE MAnuAl
ModElS
RF15I
1

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Summary of Contents for DCS RF151

  • Page 1: Ice Maker

    ICE MAkEr SErvICE MAnuAl ModElS RF15I...

  • Page 3: Table Of Contents

    CONTENTS 1. Introduction 1.1 Unit Specifications 1.2 Serial Nameplate 1.3 Before Servicing 1.4 After Servicing 1.5 Basic Refrigeration Tools 1.6 Installation 1.7 Electrical Requirements 1.8 Water Requirements 1.9 Gravity Drain 1.10 Drain Pump 1.11 Operation in “ON” Position 1.12 Operation in “CLEAN” Position 2.

  • Page 4: Introduction

    Refrigerant is under high pressure. Always evacuate any system before attempting to work on it. • Reasonable care and safe work methods should be practiced when working on any DCS product. Never work with energized electrical equipment in wet or damp areas.

  • Page 5: After Servicing

    INTrOduCTION 1.4 after Servicing After servicing the unit, whether at a site or service center, check the following: • MAKE CERTAIN THERE ARE NO LEAKS IN THE DRAIN OR WATER LINES. Check the water line, water valve, drain valve, and drain tubing for leaks.

  • Page 6: Water Requirements

    INTrOduCTION • Properly grounded outlet is required for this unit. • It is recommended or your building code may require that a single circuit GFCI receptacle or breaker be used for this unit only. DO NOT USE AN EXTENSION CORD. •...

  • Page 7: Drain Pump

    INTrOduCTION 1.10 Drain pUmp DCS Drain Pump can be used to drain water when a gravity drain is not practical. Refer to drain pump instructions supplied with the drain pump for installation. As with the gravity drain, it may be necessary to wrap the drain tubing from the Ice Maker to the inlet of the drain pump with wrap-type insulation.

  • Page 8: Operation In "Clean" Position

    INTrOduCTION harvest cycle in process will continue until the harvest cycle is complete. Once complete, all loads will de-energize and remain so until the bin thermistor senses a temperature at or above the “start production” setpoint. A new production cycle will then begin. During the first production cycle only (the switch was previously in the “OFF”...

  • Page 9: Sealed System

    Use a leak detection system that will detect R-134a refrigerant. Leaks need to be found on any leaking system BEFORE the repair takes place. The drier must be replaced anytime the sealed system is opened. Always use a DCS drier. Failure to do so may cause repeated system failure in the future.

  • Page 10: Access Valves

    SEALEd SySTEM 2.5 acceSS valveS A temporary access valve can be used to service or evaluate the system. The access valve can be installed on the compressor’s process tube (this will also be a low pressure side). Be sure to cap off access valve while servicing. This will prevent contamination of the system and/or refrigerant from leaking.

  • Page 11: Re-Charging

    SEALEd SySTEM During production cycle, low side pressures will vary anywhere from 140 psi to 2 psi, depending at what point measurements are taken. High side pressures can range from 481 psi to 25 psi also depending at what point measurements are taken. In evaluating this system, the best point to determine if pressures are correct is at the end of the production cycle.

  • Page 12: Sealed System Components

    SEALEd SySTEM COMpONENTS 3.1 hot gaS valve The hot gas valve is used to bypass the capillary tube and send warm vapor to the evaporator when opened during the harvest cycle. The valve is actuated by a solenoid that opens the valve when energized and closes when de-energized. The valve seats using gravity so the valve must remain vertical to fully close.
  • Page 13 SEALEd SySTEM COMpONENTS Black with white stripe wire Black with red stripe wire Back panel Black (hot) wire Figure 3.4 Lower shroud Remove the six screws on the bottom of the unit to slide out Figure 3.3 the mechanical assembly. Remove these two screws for the electrical bracket to slide out the mechani-...

  • Page 14: Evaporator

    SEALEd SySTEM COMpONENTS 3.2 evaporator The evaporator uses evaporating refrigerant to remove heat from the water that flows over the evaporator plate to form an ice slab. The ice slab will simply slide down the evaporator plate onto the cutter-grid during harvest. The evaporator plate will over time have a build-up of mineral deposits.
  • Page 15 SEALEd SySTEM COMpONENTS 26. Unbraze the hot gas discharge line at the compressor (see Figure 3.8). 27. Remove the compressor by removing the two lock-nuts on the mounting plate of the compressor. Lift the compressor off of the carriage bolts (see Figure 3.8). 28.

  • Page 16: Compressor

    SEALEd SySTEM COMpONENTS 3.3 compreSSor The compressor is the heart of the refrigeration system. However, it also relies on other parts of the system to function. Make certain that the other parts of the system are functioning correctly before determining that the compressor is faulty. IMPORTANT The compressor is protected from power interruption with a start delay built into the control to prevent high pressure startup (see Section 1.11, Operation - Selector Switch in the “ON”...

  • Page 17: Condenser

    SEALEd SySTEM COMpONENTS Installation: Install the four rubber grommets in the bottom of the new compressor and install the two sleeves where the carriage bolts will be located. Mount the new compressor and install the three washers and lock nuts and tighten to 45 in-lbs. DO NOT REMOVE THE RUBBER PLUGS AT THE TUBE STUBS ON THE COMPRESSOR AT THIS TIME.

  • Page 18: Drain Valve

    SySTEM COMpONENTS 4.1 Drain valve The drain valve drains water that is left in the reservoir after ice production. The valve will only be open for a fixed time of 45 seconds during the beginning of the harvest cycle. The drain valve fails by allowing water to flow into the drain during the ice production cycle (leak-by). This can be caused by a for- eign particle(s) or build-up of mineral deposits that will not allow the valve to fully seat or has caused damage to the seat of the valve.

  • Page 19: Water Valve

    SEALEd SySTEM COMpONENTS 4.2 Water valve The water valve supplies water to the reservoir for producing ice. The valve opens for one and a half minutes during initial start up or power up of the unit and opens for two minutes at each harvest cycle after the drain valve has closed. The valve has a built-in screen in the water supply fitting.

  • Page 20: System Components

    SySTEM COMpONENTS 5.1 conDenSer fan The condenser fan is used to force air over the condenser coil. The fan will only run during ice production cycle and turn off in ice harvest cycle. To check the condenser fan: • Make sure motor shaft turns freely. This can be done by rotating the fan blade by hand and observing any excessive resis- tance.
  • Page 21 SySTEM COMpONENTS The following will happen in the event of a thermistor failure: If the evaporator thermistor fails, all loads will be shut off and the unit will not run. If the evaporator thermistor senses temperature outside of 0-140 degrees F, all loads will be shut off and the unit will not run. The control LED will blink three times every five seconds.
  • Page 22 SySTEM COMpONENTS Bin Thermistor: The bin thermistor is made up of a soft copper tube body and placed inside a plated copper sensing tube. This plated tube is then secured to the side of the Ice Maker ’s bin to detect the ice bin level. The bin thermistor gives voltage input to the electronic control.

  • Page 23: Electronic Controller And Diagnostic Led

    SySTEM COMpONENTS 5.3 electronic controller anD DiagnoStic leD The electronic control can be replaced without removal of the unit from the front of the unit. For electronic control functions, see Section 1.11, Operation - Selector Switch in the “ON” Position. Evaporator thermistor connector Power wire harness connector Bin thermistor connector...

  • Page 24: Cutter-Grid Transformer

    SySTEM COMpONENTS 5.4 cUtter-griD tranSformer The cutter-grid transformer is used to step down the voltage to the cutter-grid to 12VAC. The transformer is ON only from the start of a harvest cycle to 35 minutes from the start of the production cycle. The transformer remains off at all other times. The transformer itself can be checked by applying 120VAC to the marked 120V (for the hot lead) and COM (neutral lead) side of the transformer and reading the 12V side using a multimeter.

  • Page 25: Interior Components

    INTErIOr COMpONENTS 6.1 cUtter-griD The cutter-grid is used to cut cubes from the ice slab formed on the evaporator. It uses low voltage, 12VAC from the transformer, to heat the wires. Wires are warm to the touch of a hand when not under the load of a slab of ice. The cutter-grid is on only from the start of a harvest cycle to 35 minutes from the start of the production cycle (see Section 1.1, Operation - Selector Switch in “ON”...
  • Page 26 INTErIOr COMpONENTS Removing the Reservoir: Remove the escutcheon panel from the inside of the unit. Remove the cutter-grid (see Figure 6.1). Remove the four screws that secure the ice deflector. Remove the ice deflector. Drain the reservoir by removing the drain plug located on the bottom of the reservoir. Remove the two screws and spacers that secure the reservoir (see Figure 6.2).

  • Page 27: Circulation Pump

    INTErIOr COMpONENTS 6.3 circUlation pUmp The circulation pump is used to circulate the water in the reservoir over the evaporator. The circulation pump will run only during ice production cycle and turn off in ice harvest cycle and also when called on for the clean cycle. The pump is a centrifugal impeller type pump.

  • Page 28: Wiring

    WIrING Figure 7.1: Ice Maker Wiring Diagram...

  • Page 29: Ordering Parts

    Model and serial number located on the serial nameplate (see Section 1.2, Serial Nameplate) Color of the model Metal or plastic grill Type of door To order parts, call or write: Fisher & Paykel Appliances, Inc. Attention: DCS Customer Care 5900 Skylab Road Huntington Beach, CA 92647 phone: 888.936.7872 www.dcsappliances.com...

  • Page 30: Ice Maker Storage - Outdoor Model

    ICE MAkEr STOrAGE - OuTdOOr MOdELS Storing the Ice Maker: If the Ice Maker is to be moved, not used for an extended period of time, or will be in an area that will be near freezing tempera- tures - below 37 degrees F, it is necessary to remove the remaining water in the icemaking system. CAUTION ALL WATER MUST BE DRAINED AND REMOVED TO PREVENT ICE MAKER DAMAGE AND POSSIBLE WATER DAMAGE TO THE SUR- ROUNDING AREA IN FREEZING CONDITIONS.

  • Page 31: Restarting The Ice Maker

    rESTArTING THE ICE MAkEr With the rocker switch in the “OFF” position, plug the unit into an electrical outlet. Reconnect or turn on the water supply line. Reconnect the drain tubing if removed. Turn the rocker switch to the “ON” position. Check the water inlet, drain lines, and fittings for any water leaks.

  • Page 32: Troubleshooting Guide

    TrOuBLESHOOTING GuIdE PROBLEM POSSIBLE CAUSE CORRECTION 1. The unit is unplugged. Plug in the unit. 2. Breaker is tripped or fuse is blown. Reset breaker or replace fuse. Check to make sure there is not a short in the electrical circuit. Unit does not operate.
  • Page 33 TrOuBLESHOOTING GuIdE PROBLEM POSSIBLE CAUSE CORRECTION 10. Room and/or water temperature is Move the unit to an area where ambient too warm. temperature is below 90 degrees F. The unit should not be placed next to a heat source such as an oven. Check for cold water connection.
  • Page 34 TrOuBLESHOOTING GuIdE PROBLEM POSSIBLE CAUSE CORRECTION 7. Leaking drain valve See “Cleaning Your Ice Maker” section for cleaning the unit. This will also dissolve and flush out foreign material in the Ice cubes are too small (less than 1/2 inch drain valve causing it to leak.
  • Page 35 TrOuBLESHOOTING GuIdE PROBLEM POSSIBLE CAUSE CORRECTION 1. Low water level in reservoir. Make sure that the reservoir drain plug is installed properly. Check the water line to the unit to make sure there are no restrictions or kinks in the line. Check all filters to make sure they are not restrict- ed or plugged.
  • Page 36 TrOuBLESHOOTING GuIdE PROBLEM POSSIBLE CAUSE CORRECTION 2. The grid-cutter is not plugged into the Remove the escutcheon panel and plug receptacle. cutter-grid into the receptacle on the side of the line. Cutter-grid is not cutting the ice slab. 3. Time to cut through the slab. It can take up to 35 minutes to cut through a harvested ice slab.
  • Page 37 TrOuBLESHOOTING GuIdE PROBLEM POSSIBLE CAUSE CORRECTION 2. Discharge line is restricted or kinked. Check the discharge line and connection to the desired drain for any restrictions or kinks and repair as necessary. The drain pump cycles on and off errati- 3.

  • Page 38: Warranty

    This warranty extends to the original purchaser and any succeeding owner of the Product for products purchased for ordinary single-family home use. All service under this Limited Warranty shall be provided by Fisher & Paykel Appliances Inc. or its Authorized DCS Service Agent during normal business hours.
  • Page 39 Please read this Use and Care Guide. If you then have any questions about operating the Product, need the name of your local DCS Authorized Service Agent, or believe the Product is defective and wish service under this Limited Warranty, please contact your dealer or call us at: TOLL FREE 1-888-936-7872 or contact us through our web site: www.dcsappliances.com...
  • Page 40 NOTES...
  • Page 41 NOTES...
  • Page 42 NOTES...
  • Page 44 Fisher & Paykel Appliances, Inc. 5900 Skylab Road, Huntington Beach, CA 92647 Customer Care: 888.936.7872 Fax: 714.372.7003 www.dcsappliances.com As product improvement is an ongoing process, we reserve the right to change specifications or design without notice. P/N 243198 Rev. A Litho in USA 10/2008...

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