Sub-Zero Wolf 506UI Service Manual Download

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Page 24

Theory of Operation

Model 506 (UC Ice Maker)

3-12

#3752200 - Revision B - May, 2006

On units with an FSP condensate pump installed,
power will be supplied to the condensate pump through
the receptacle. The pump will operate when needed
through a pressure switch in the pump itself.

(See

Figure 3-22)

The refrigeration system does not operate during the
CLEAN cycle.

OFF

CLEAN

SERVICE

SWITCH

115

VOLTS

60 HERTZ

WATER

PUMP

CONDENSER

FAN

START RELAY

COMPRESSOR

RECEPTACLE

HOT
GAS SOLENOID

N.C.

WATER

VALVE

SOLENOID

EVAPORATOR
THERMOSTAT

BIN

THERMO-
STAT

OVERLOAD

TRANSFORMER

115 V

8.5 V

DOOR SWITCH

CUTTER GRID

UNIT SHOWN WITH FSP CONDENSATE;
PUMP; SERVICE SWITCH IN “CLEAN”
POSITION; DRAINAGE WATER AT
PUMP; IN CLEAN CYCLE.

PLUG

PRESSURE

SWITCH

CONDENSATE

DRAIN PUMP

SHUNT

Figure 3-22. Clean Cycle with FSP Pump

Summary of Contents for Wolf 506UI

Page 1: ...eral Information 2 Installation Information 4 Controls Operation 14 Component Access Removal 27 Troubleshooting Guide 40 Technical Data 44 Wiring Diagrams 47 subzero com 800 222 7820 506UI Service Man...

Page 2: ...PM Central Time Monday through Friday IMPORTANT SAFETY INFORMATION Below are Product Safety Labels used in this manual The Signal Words used are WARNING or CAUTION When reviewing this manual please no...

Page 3: ...Year TOTAL PRODUCT warranty parts and labor Five year LIMITED SEALED SYSTEM warranty sealed system parts only Warranty Details Total Product Parts includes but is not limited to the following Control...

Page 4: ...nit will require an electrical branch circuit of 115 Volts 60 Hertz 1 Phase 15 Amp delayed action fuse or circuit breaker It is recommended that the ice maker is the only appli ance plugged into the r...

Page 5: ...distance from the unit to the connecting point on supply line and add approximately three feet to allow for connection to the water valve in the unit Be sure both ends of copper tubing are cut square...

Page 6: ...ressure activated high speed pump which will lift water from melting ice and fill cycles to a place where it can be disposed of The pump installs in the compartment below the ice maker storage bin and...

Page 7: ...eplaced if the unit is to be operated later without a condensate pump Tape shunt to wall of unit compartment to avoid loss Run the discharge line from the pump directly to the available drain The FSP...

Page 8: ...from side to side by placing a level across the top of the cabinet 10 If necessary the ice maker should be shimmed so that it is solid as well as level Use a hard perma nent material such as Masonite...

Page 9: ...Spread the trim on one side and remove the door handle and top trim piece 4 Slide the metal panel out and replace with the new colored panel See Figure 2 13 5 Reassemble the door 6 Remove the screws...

Page 10: ...vehicle where it will be operating while the RV is moving it is necessary to purchase and install a Water Deflector Kit Part No 702354 from your FSP parts Distributor The 702354 water deflector kit is...

Page 11: ...etely drained replace drain plug 5 Pour 1 2 gallon approximately 2 liters of hot tap water into the water reservoir pan Turn the service control switch to the CLEAN position Allow the hot water to cir...

Page 12: ...IQ UID CLEANING SOLUTION USE ONLY A CITRIC ACID BASED SOLUTION OR A COMBINATION OF CITRIC ACID AND PHOSPHORIC ACID BASED SOLUTION DO NOT USE MURATIC ACID OR ANY OTHER ACID NOT APPROVED FOR USE IN A FO...

Page 13: ...sh or a round dust brush attach ment to a vacuum cleaner remove lint and dirt from the condenser fins 4 Use a vacuum cleaner to remove dirt from the bot tom of the unit compartment 5 Replace the lower...

Page 14: ...dramatic pressure drop occurs as the low pressure cool liquid refrigerant leaves the small diameter capillary tube and enters the larger diameter evaporator tubing and the refrigerant begins to vapori...

Page 15: ...tube During the later stages of the ICE MAKING cycle as the ice slab forms on the evaporator freezing plate some of the refrigerant passing through the evaporator will not evaporate into a gas but wi...

Page 16: ...refrigerant that has accumulated in the accumulator tube up into the evaporator The warmed liquid refrigerant helps to evenly heat the evaporator plate so the ice slab releases quickly and evenly Eva...

Page 17: ...em when the water supply has a low mineral content Ice Making Cycle In the water system See Figure 3 4 the water pump moves the water from the reservoir pan up to the dis tributor where it flows out o...

Page 18: ...reservoir pan As the reservoir fills the mineral laden water from the previous ICE MAKING cycle is flushed out to the drain See Figure 3 9 Figure 3 8 Cutting Into Cubes Figure 3 7 Ice Slab Sliding of...

Page 19: ...OFF CLEAN SERVICE SWITCH 115 VOLTS 60 HERTZ N L WATER PUMP CONDENSER FAN PLUG PRESSURE SWITCH CONDENSATE DRAIN PUMP START RELAY COMPRESSOR S R RECEPTACLE HOT GAS SOLENOID N C N C WATER VALVE SOLENOID...

Page 20: ...the bin thermostat to the compressor See Figure 3 14 Power is supplied through the evaporator thermostat to the condenser fan and the water pump If an FSP condensate pump is installed on the unit powe...

Page 21: ...evaporator temperature rises because of the hot gas flow and because the ice slab has slid off the evaporator thermostat switches the unit to the ICE MAKING cycle This cycling between the ICE MAKING...

Page 22: ...n the bin is full of ice 2 1 6 3 ON OFF CLEAN SERVICE SWITCH 115 VOLTS 60 HERTZ N L WATER PUMP CONDENSER FAN START RELAY COMPRESSOR S R RECEPTACLE HOT GAS SOLENOID N C N C WATER VALVE SOLENOID EVAPORA...

Page 23: ...NOID N C N C WATER VALVE SOLENOID EVAPORATOR THERMOSTAT 2 3 1 BIN THERMO STAT OVERLOAD TRANSFORMER 115 V 8 5 V DOOR SWITCH CUTTER GRID UNIT SHOWN WITH FSP CONDENSATE PUMP SERVICE SWITCH IN OFF POSITIO...

Page 24: ...ration system does not operate during the CLEAN cycle 2 1 6 3 ON OFF CLEAN SERVICE SWITCH 115 VOLTS 60 HERTZ N L WATER PUMP CONDENSER FAN START RELAY COMPRESSOR S R RECEPTACLE HOT GAS SOLENOID N C N C...

Page 25: ...um softener reduces frequency of Carbonates cleaning by 50 RECOMMENDATIONS Water softeners and polyphosphate feeders are not cure alls but do reduce and in some cases prevent scale buildup They are pa...

Page 26: ...ECT ON ICEMAKER T D S 50 1000 ppm Cloudy Slow Cutting Temporary and Permanent or higher Refreezing Scale Buildup Chlorides 200 300 ppm Major Cause of Cloudy Ice Temporary and Permanent or higher Slow...

Page 27: ...access to other components When following a component removal procedure it may be necessary to reference another component removal procedure listed earli er in this section NOTE Before continuing ple...

Page 28: ...lt outward 7 Remove control panel components by first discon necting wire leads from component terminals See Figure 4 2 8 Extract screws that pass through the front face of the control panel and faste...

Page 29: ...Then check across the terminals See Figure 4 4 If evaporator is cold If evaporator is warm To test method 2 1 Remove wire lead from terminal 6 on the service control switch disabling the water pump Se...

Page 30: ...er The transformer has a 115 Volt AC primary coil with a secondary coil that produces 8 5 Volts at 2 Amps A special replacement service transformer is available from your FSP parts distributor with a...

Page 31: ...he hinge pin on the other side Friction Door Catch The catch is located on the bottom of the escutcheon It can often be adjusted by adding washers under the catch If these does not correct the problem...

Page 32: ...d should be replaced 6 Visually check the terminals insulators and frame They should all be free of mineral build up The insulators should not show any signs of melting If the terminals insulators or...

Page 33: ...ttach a 120 volt test cord to the water pump plug the top two pins The pump should operate when power is supplied 2 Visually check the water pump plug and the socket on the rear bin wall They should b...

Page 34: ...evaporator plate can be dropped for better access To drop 1 Though not necessary it is recommended that the bin door be removed for easier access 2 Remove the cutter grid assembly water reservoir pan...

Page 35: ...ach of the small holes in the distributor must be unrestricted There is a built in water restrictor at the inlet end of the distributor The restrictor controls the amount of water running over the eva...

Page 36: ...ot in place during operation warm air could be continually recirculated through the unit area resulting in inefficient operation and low quality ice To pull out the unit compartment 1 Remove the door...

Page 37: ...screen in the water inlet To check 1 After removing the wire leads use an ohmmeter set on the R x 100 scale 2 Test across the terminals The ohmmeter should read approximately 250 ohms A flow washer in...

Page 38: ...t on the R x 10K scale Check from each terminal C S and R to compressor housing The meter probe on the compressor housing should be placed on the grounding blade or in an area that is free of paint su...

Page 39: ...is plunger must seat properly for efficient operation of the ice maker See Figure 4 25 If there is a small leak in the valve the outlet tube from the valve will feel cold and may frost up during the I...

Page 40: ...tion to take to correct the problem Troubleshooting Guide Layout Page A Compressor won t run No ice in bin 6 3 B Compressor runs No ice in bin 6 3 C Compressor runs continuously bin full of ice 6 3 D...

Page 41: ...set for thin cubes 2 Not enough water being circulated over evaporator 3 Evap thermostat out of calibration 1 Move to warmer area above 55 F 2 Connect water 3 Locate and repair 4 Replace relay 5 Move...

Page 42: ...servoir pan 4 The water level is over the top of the drain tube in reservoir pan at beginning of ICEMAKING cycle 5 The water restrictor or the holes in the distributor are plugged 6 The water pump is...

Page 43: ...ce block ing the passage of warm air from the unit compartment into the evaporator area 1 Ice thickness control set too high too thick of ice slab is forming 2 Overcharge of refrigerant in sealed syst...

Page 44: ...the hot gas line at the front edge of the evaporator This shortens the defrost time Adjust range screw according to chart on unit thermostat bracket ICE PRODUCTION Lbs IN 24 HOURS 100 F 35 34 33 32 N...

Page 45: ...ube to the hot gas line at the front edge of the evaporator This shortens the defrost time Adjust range screw according to chart on unit thermostat bracket ICE PRODUCTION Lbs IN 24 HOURS 100 F 35 34 3...

Page 46: ...Storage Capacity 35 Lbs 4620 Cublets Electrical Requirements 115 Volts AC 50 60 Hertz Average Power Consumption 250 300 Watts Compressor 1 5 HP Piston Refrigerant Charge R 12 Prior to Serial 1181341...

Page 47: ...VERLOAD TRANSFORMER 115 V 8 5 V DOOR SWITCH CUTTER GRID PLUG PRESSURE SWITCH CONDENSATE DRAIN PUMP EVAP THERMO BIN THERMO SERVICE SWITCH 1 3 3 2 1 6 2 BK Y W BK BK Y 0 0 BK BK BU BK Plug 115V 60 Hz 1...

Page 48: ...8 5V R RED BK BLACK BL BLUE W WHITE Y YELLOW OR ORANGE BK W BLACK WHITE TRACER G Y GREEN YELLOW TRACER COLOR CHART Connector Screw Connector Closed End Disconnect Terminal Permanent Connection Plug Co...

Page 49: ...on B May 2006 1 6 Service Switch Water Pump Water Pump CLEAN Cycle L N 2 3 2 1 1 6 Service Switch Water Pump L N Water Pump ICE MAKING Cycle Bin Thermostat Evaporator Thermostat Service Switch 2 3 2 1...

Page 50: ...h gravity drain or non FSP pump Shunt in receptacle 2 3 2 3 L N Bin Thermostat Evaporator Thermostat NC Receptacle Hot Gas Solenoid Pressure Switch FSP Condensate Drain Pump Hot Gas Valve Solenoid Uni...

Page 51: ...t NC Receptacle Water Solenoid Pressure Switch FSP Condensate Drain Pump Water Valve Solenoid Units with FSP condensate drain Valve Service Switch 2 3 L Bin Thermostat Service Switch N Overload Compre...

Page 52: ...n Light 2 3 L Service Switch 8 5 V 115V Transformer N Cutter Grid Cutter Grid 2 3 2 3 L N Bin Thermostat Evaporator Thermostat Receptacle FSP Condensate Drain Pump Service Switch Drain Pump FSP Conden...

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