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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.

The valve can fail by either being stuck in the open or stuck in the closed position. When stuck fully or partially opened, the valve

will not seat and seal causing leak-by. This will result in long ice production cycles and higher than normal low side pressures. A

stuck closed valve will not allow the valve to open which will keep the Ice Maker in the harvest mode. A contaminated system or

damage to the valve body will cause any of these failures. Care in keeping the system clean, handling of the valve, keeping the

valve cool during brazing, and evacuation of the system before charging must be done to prevent damage and eventual failure of

the valve.

A quick way to check the valve to see that it opens and closes freely (with the system still sealed) is to repeatedly energize and de-

energize the solenoid and listen for the valve opening and closing. You should be able to hear a distinct “click” of the valve piston

moving in the bore if the valve is opening and closing. If you cannot hear this “click” then the valve is stuck and will need to be

replaced. The solenoid coil itself can be checked by measuring resistance across the electrical terminals. A good solenoid coil will

have a resistance reading of 380-390 ohms.

Removing the Hot Gas Valve:

Disconnect power, water line, and drain line. If a drain pump is used, it will need to be disconnected and removed.

Remove the back panel and lower shroud (see Figure 3.3 ).

Remove the grill by removing the two or four screws (depending on grill style) and disconnecting the three wires to the

rocker switch (see Figure 3.4).

Remove the drain valve.

Remove the water valve.

Take out the two screws that secure the top of the electrical bracket located in the front of the mechanical area (see

Figure 3.5).

Remove the six screws that secure the baseplate to the cabinet on the bottom of the unit (see Figure 3.6).

Gently slide the mechanical out the back of the unit just enough to gain access to the hot gas valve and drier assembly (see

Figure 3.7).

Install system access valve(s) and recover refrigerant. After recovering, be sure to cap off the access valve to prevent contami-

nation of the system.

Disconnect the wires at the solenoid, remove the solenoid-retaining clip, and remove the solenoid (see Figure 3.1).

10.

Unbraze the brazed union upstream of the hot gas valve (see Figure 3.2). Be sure to cap off after tubing has cooled.

11.

Unbraze and remove the capillary tube from the drier assembly.

12.

Unbraze the drier assembly at the end of the condenser (see Figure 3.1). Be sure to cap off after cooling.

13.

Figure 3.1

Figure 3.2

Solenoid retainer

Brazed joint (tee fitting)

Drier assembly brazed joint

Hot gas solenoid

Hot gas valve

Evaporator bypass tube

brazed joint

SEALEd SySTEM COMpONENTS

Содержание RF151

Страница 1: ...1 ICE MAker Service manual Models RF15I ...

Страница 2: ......

Страница 3: ...Tube 7 2 5 Access Valves 8 2 6 Pressure and Temperature 8 2 7 Re charging 9 3 Sealed System Components 3 1 Hot Gas Valve 10 3 2 Evaporator 12 3 3 Compressor 14 3 4 Condenser 15 4 Valves 4 1 Drain Valve 16 4 2 Water Valve 17 5 System Components 5 1 Condenser Fan 18 5 2 Thermistors 18 5 3 Electronic Controller and Diagnostic LED 21 5 4 Cutter Grid Transformer 22 6 Interior Components 6 1 Cutter Grid...

Страница 4: ...will need to be given when inquiring about the unit or ordering parts DO NOT REMOVE THE SERIAL NAMEPLATE FROM THE UNIT See Figure 1 1 below for a sample serial tag with manufacturing date code logic 1 3 Before Servicing Always disconnect power to any DCS product before attempting to service it Always verify that power has been disconnected If the unit has been running use caution around the conden...

Страница 5: ...st tenth of an ounce 5 Access valves 6 Small and large tubing cutter 7 Brazing torch 8 Swaging tools 9 Multimeter 10 Leak detection equipment for detection of R 134a 11 Standard hand tools assorted Phillips and standard screwdrivers sockets allen wrenches adjustable wrenches etc 12 Rivet gun and assorted rivets 13 Drill motor and assorted metal drills 14 Vacuum pump 15 1 6 Installation Unit can be...

Страница 6: ...tallation instructions for water valves and water line hook ups Make certain the waterline and the valve do not leak prior to enclosing cabinet 1 9 Gravity Drain NOTICE OBSERVE AND FOLLOW ALL LOCAL AND STATE CODES WHEN INSTALLING ICE MAKER NOTICE A DRAIN PUMP MUST BE USED FOR ICE MAKER DRAIN The drain fitting from the Ice Maker is for 5 8 inch OD tubing This tubing can be routed to a gravity drain...

Страница 7: ...is the Timing Diagram Operation for the electronic control Figure 1 3 Upon setting the switch to the ON position the water solenoid will energize for one and a half minutes and then de energize When the bin thermistor senses temperature at or above the start ice setpoint and the evaporator thermistor senses tempera ture at or above the production setpoint the production cycle will begin The circul...

Страница 8: ... 11 0 degrees F 2 degrees F Production 45 0 degrees F 2 degrees F Setpoint versus Temperature and Voltage 120VAC 3 degrees F 1 12 Operation Selector Switch is in the CLEAN Position IMPORTANT The assumptions before proceeding are that water is supplied to the Ice Maker see Section 1 8 Water Require ments there is proper electrical power to the Ice Maker see Section 1 7 Electrical Requirements the d...

Страница 9: ...e is found to be plugged or severely restricted Restrictions 5 cannot be flushed out Be sure to purge the system after final brazing This will flush out any air or moisture that may have entered the system before 6 being absorbed into the refrigerant oil IMPORTANT Testing of the electrical system defrost system controls and air flow should be performed before entering any sealed system What may fi...

Страница 10: ...nd evaporator plate the thermistor resistance 2 value can be corresponded to the temperature see Table C in Section 5 2 Thermistors for values If it has been determined that there is proper contact between the thermistor and the evaporator plate the voltage at the 3 thermistor terminals can be read The voltage can be read while the unit is running by attaching test leads to thermistor ter minals a...

Страница 11: ...IAGNOSING AND REPAIRING THE SYSTEM see Section 2 1 Sealed System Introduction Be sure to flush the system with dirty nitrogen gas and evacuate to 50 microns before re charging THE METHOD FOR RE CHARGING THE UNIT IS BY WEIGHT USING VAPOR REFRIGERANT Using manifold gage set up hook up charge hoses to the access valve on the compressor s process tube If any access valve is attached to the high side p...

Страница 12: ... measuring resistance across the electrical terminals A good solenoid coil will have a resistance reading of 380 390 ohms Removing the Hot Gas Valve Disconnect power water line and drain line If a drain pump is used it will need to be disconnected and removed 1 Remove the back panel and lower shroud see Figure 3 3 2 Remove the grill by removing the two or four screws depending on grill style and d...

Страница 13: ...ssembly 4 Braze the hot gas valve tube from the bottom of the valve into the evaporator bypass tube 5 Cool the brazed joints with a damp cloth 6 Remove the heat sink or damp cloth from the valve body 7 Check for leaks using dry nitrogen gas and a leak detection system 8 Flush the system and re charge 9 Reassemble reversing steps 1 through 9 10 Figure 3 3 Back panel Lower shroud Black with white st...

Страница 14: ...e front of the unit 2 Remove the escutcheon panel 3 Remove the cutter grid see Section 6 1 Cutter Grid 4 Remove the ice deflector 5 Remove the reservoir see Section 6 2 Reservoir 6 Remove the circulation pump see Section 6 3 Circulation Pump hose and distributor 7 Remove the evaporator thermistor fastened on the bottom of the evaporator with a stainless hex head or Phillips screw 8 Remove the four...

Страница 15: ...ing harness 30 Remove the evaporator from the front of the unit The evaporator will need to be tilted 90 degrees down and then the tubing harness with the accumulator will fit through the opening in the liner Installing the Evaporator Reverse the removal procedure see above for installation Remove the plugs from the compressor right before brazing Make certain that the suction line and tubing harn...

Страница 16: ...g the two or four screws depending on grill style and disconnecting the three wires to the 3 rocker switch Remove the drain valve see Figure 4 1 4 Remove the water valve see Figure 4 2 5 Take out the two screws that secure the top of the electrical bracket located in the front of the mechanical area see 6 Figure 3 4 Remove the six screws that secure the baseplate to the cabinet on the bottom of th...

Страница 17: ...ystem high side pressures and temperatures will verify if this is the case Removing the Condenser 1 Disconnect power water line and drain line If a drain pump is used it will need to be disconnected and removed 2 Remove back panel and lower shroud see Figure 3 1 3 Remove the grill by removing the two or four screws depending on the grill style and disconnecting the three wires to the rocker switch...

Страница 18: ...will need to be replaced Removing the Drain Valve Drain water in the reservoir by removing the drain plug or switching to the CLEAN switch position and then to the OFF 1 position Replace the drain plug if this method is used after the water has been drained Disconnect power water line and drain line If a drain pump is used it will need to be disconnected and removed 2 Remove the back panel and low...

Страница 19: ... up a one quart container The time should be 60 seconds to get the 0 25 gpm specification of the valve If it takes substantially less than 60 seconds check the water supply pressure to make certain it is not above 120 psi static pressure If it is not the metering orifice of the valve has been damaged or changed and the valve will need to be replaced If it takes substantially more than 60 seconds c...

Страница 20: ... for reassembly see Figure 3 4 Remove the drain valve 4 Remove the water valve 5 Take out the two screws that secure the top of the electrical bracket located in the front of the mechanical area see 6 Figure 3 5 Remove the six screws that secure the baseplate to the cabinet on the bottom of the unit see Figure 3 7 7 Gently slide the mechanical out the back of the unit enough to gain access to the ...

Страница 21: ...20 68 2 430 25 77 2 000 If the thermistor has been tested and is found to be good check the temperature of the evaporator plate and the resistance of the thermistor If the temperature of the evaporator plate does not correspond to a proper resistance from the thermistor check for a proper and secure connection of the thermistor to the evaporator plate bracket Removing the evaporator thermistor Rem...

Страница 22: ...with the ability to read resistance To check the thermistor Disconnect and remove thermistor from unit 1 Use a reference temperature point that is know such as an ice bath and measure the resistance across the wire leads 2 Compare the recorded resistance with Table C 3 If measured resistance falls outside the resistance given in Table C within 4 of the value the thermistor is bad and will need to ...

Страница 23: ...in and evaporator thermistors are out of range Removing the Electronic Control Remove the front grill and disconnect the rocker switch wire see Figure 3 4 1 Disconnect the power wire harness connector bin thermistor connector and evaporator thermistor connector from the elec 2 tronic control see Figure 5 1 Remove the Phillips head screw that secures the electronic control to the electrical bracket...

Страница 24: ...transformer Removing the Transformer Disconnect power water line and drain line If a drain pump is used it will need to be disconnected and removed 1 Remove the back panel and lower shroud see Figure 3 3 2 If a drain pump has been installed it will need to be removed 3 Remove the two Phillips head screws that secure the transformer to the electrical bracket see Figure 5 4 4 Mark and remove the fou...

Страница 25: ...at are not on the insulators Removing the Cutter Grid Remove the escutcheon panel from inside the unit 1 Unplug the cutter grid from the receptacle on the side of the liner see Figure 6 1 2 Remove the four screws that secure the cutter grid to the liner see Figure 6 1 3 Remove the cutter grid 4 Installing the Cutter Grid Reinstall the cutter grid with the four screws 1 Plug the cutter grid into th...

Страница 26: ...f the reservoir and then the screw and plastic washer to the inside of the reservoir Repeat 4 for the other side Route the water line from the circulation pump between the liner and the reservoir and through the clamp attached to the 5 evaporator This will keep it away from the path of the ice slab see Figure 6 5 Reinstall the ice deflector 6 Reinstall the cutter grid 7 Plug the cutter grid into t...

Страница 27: ... is found replace the circulation pump Check current draw Typical current draw will be 0 36 amp without pump resistance If excessive current draw is found check the pump s impeller for foreign particles or severe build up of mineral deposits The circulation pump can run dry without pump damage Removing the Circulation Pump Disconnect power to the Ice Maker 1 Remove the escutcheon panel from inside...

Страница 28: ...26 Figure 7 1 Ice Maker Wiring Diagram WIRING ...

Страница 29: ...located on the serial nameplate see Section 1 2 Serial Nameplate 1 Color of the model 2 Metal or plastic grill 3 Type of door 4 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 Ordering Parts ...

Страница 30: ...water valve 2 Switch rocker switch to CLEAN for about one minute This will energize and open the water valve and remove most of the 3 water from the valve and the outlet water line to the reservoir Switch rocker switch to OFF position This will energize and open the drain valve to drain the reservoir and the Ice Maker 4 drain system Unplug the unit from the electrical outlet 5 Remove back panel 6 ...

Страница 31: ... rocker switch to the ON position 4 Check the water inlet drain lines and fittings for any water leaks 5 Check drain pump if equipped operation by pouring approximately two quarts of water into the ice storage bin The drain 6 pump should activate and discharge water refer to drain pump installation instructions Check for water leaks at all hose connections RESTARTING THE ICE Maker ...

Страница 32: ...rocker switch on the grill of the Ice Maker to the ON position 4 Build up of deposits on evaporator plate See Cleaning Your Ice Maker section for cleaning the unit for proper operation 5 Distributor tube is restricted or not installed correctly See Cleaning Your Ice Maker section for cleaning the unit for proper operation 6 Grid cutter is unplugged Plug in the grid cutter so that ice slabs can be ...

Страница 33: ...e is slowly melting in the ice bin and will affect the size of the ice cubes This is normal operation When the ice bin needs to be replenished cubes will return to regular size 2 Not enough water 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 ...

Страница 34: ...is secured properly to the evapora tor If secured check resistance with Table C in Section 5 2 Thermistors Hollow ice slab 1 Distributor tube is restricted See Cleaning Your Ice Maker section for cleaning the unit for proper operation 2 Build up of deposits on evaporator plate See Cleaning Your Ice Maker section for cleaning the unit for proper operation and cube size 3 Low water level in reservoi...

Страница 35: ...per air circu lation Check and clean the condenser coil by removing the grill in the front of the unit Clean the condenser with a vacuum and brush attachment 6 Faulty drain pump installation or faulty drain pump If drain pump is installed drain dis charge vent line pump is not level or a faulty drain pump can cause drain pump outlet power to trip off momentarily which turns off the Ice Maker and t...

Страница 36: ...The Ice Maker is not level Use a level to check the unit for level from side to side and front to back 2 Room temperature is too cold Move the unit to an area where tempera ture is above 55 degrees F 3 The selector switch is not in the ON position Set the rocker switch on the grill of the ice Maker to the ON position Water keeps backing up into the ice bin gravity drain 1 Inadequate drain system R...

Страница 37: ...tricted or kinked Check the discharge line and connection to the desired drain for any restrictions or kinks and repair as necessary 3 The drain pump is not level THE DRAIN PUMP MUST BE LEVEL Check for level on the top of the drain pump case and adjust the tubing or use shims to level Troubleshooting Guide ...

Страница 38: ...including installation or other charges 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 Limited Warranty How Long Does this Limited Warranty Last ...

Страница 39: ...limitation or exclusion may not apply to you How to get service 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 ww...

Страница 40: ...38 NOTES ...

Страница 41: ...39 NOTES ...

Страница 42: ...40 NOTES ...

Страница 43: ......

Страница 44: ... Huntington Beach CA 92647 Customer Care 888 936 7872 Fax 714 372 7003 www dcsappliances com P N 243198 Rev A Litho in USA 10 2008 As product improvement is an ongoing process we reserve the right to change specifications or design without notice ...

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