Màquina de gel SUB-ZERO 7028783

INFORMACIÓ DEL SISTEMA DE LA MÀQUINA DE GEL
This Series unit uutilisesa Nidec-Servo ® icemaker. Its operation is not complex, but understanding its componentsand operation cycle will assist a Service Technician in making a proper diagnosis of problems.

TO AVOID ELECTRIC SHOCK, ALWAYS DISCON-NECT ELECTRICAL POWER TO THE UNIT WHEN SERVICING THE ICEMAKER.

NOTES

• The “ICE MAKER” key on the control panel activates the ice maker system. If the ice cube icon is not displayed on the LCD, the icemaker system is OFF.
• To allow ice to freeze fully and reduce the effects of low water pressure, the electronic control disables the ice-maker system for 45 minutes after each ice harvest.
• Power to the freezer lights is monitored to help con-trol icemaker operation. If the freezer door is open, power to the icemaker is interrupted.
• El sistema de la màquina de gel està desactivat quan la unitat està en mode Sabbath.

COMPONENTS DE LA MÀQUINA DE GEL

• The following are descriptions that explain the function of each icemaker component. The components are diagrammed in Figure 5-1 on the next page.
• Support – The support is the housing around the elec-trical components and wire connections. The support is attached to the ice mould.
• Mounting Plate – The drive motor, holding switch, water valve solenoid switch, timing gear, timing cam and water fill adjusting screw are attached to the metal mounting plate.
• A continuació, la placa de muntatge s'acobla al suport.
• Motor d'accionament: 115 volts de CA subministrats al motor d'accionament fan que el motor funcioni. El motor té un únic eix de sortida amb un petit engranatge. L'engranatge del motor acciona/fa girar l'engranatge de distribució.
• Engranatge de distribució: l'engranatge de distribució és accionat/girat per l'engranatge del motor d'accionament i està unit a la lleva de distribució.
• Timing Cam – The timing cam is attached to the tim-ing gear and the ice ejector is inserted into the center of the timing cam.
• As the timing cam rotates, high and low spots on the cam operate the water valve solenoid switch and the holding switch. The timing cam also moves the lever arm side to side and rotates the ice ejector.
• Ice Mould – The ice mould is where the eight crescent-shaped ice cubes are formed.
• Mould Heater – The mould heater uses 165 watts to thaw the ice free from the mould.
• Expulsor de gel: l'extrem d'accionament de l'expulsor de gel té forma de "D" per encaixar al forat en forma de "D" de la lleva de sincronització. Té vuit fulles que giren i escombren el gel de les cavitats del motlle durant la fase d'expulsió del cicle.
• Ice Stripper – The stripper is attached to the dumping side of the mouldd, serving as a decorative side cov,er, and it also prevents ice from falling back into the mould.
• Bearing / Inlet – The bearing/inlet is attached to the ice mould, opposite the support. Water enters the bearing/inlet and is directed to the ice mould. The TheThe
• bearing/inlet also supports the ice ejector at the end opposite the timing cam.
• Thermostat – The thermostat is a single-pole, single-throw, bi-metal switch. At 15°F (-9°C) ± 3° it closes, starting the ice ejection phase.
• Thermal-Mastic – A substance similar in appearance to grease that is applied between the thermostat and the ice mould. Its purpose is to increase thermal conductivity between the mould and the thermostat.
• Braç de palanca i braç de tancament: el braç de palanca es mou d'un costat a l'altre dues voltes de la lleva de temps. A mesura que es mou, puja i baixa el braç de tancament i acciona l'interruptor de tancament per controlar la quantitat de producció de gel. Si el braç de tancament queda a sobre del gel del dipòsit d'emmagatzematge durant qualsevol de les dues revolucions, l'interruptor de tancament romandrà obert, aturant la producció de gel al final d'aquesta revolució.
• Interruptor solenoide de la vàlvula d'aigua: un interruptor unipolar de doble gir que permet que l'electricitat arribi al solenoide de la vàlvula d'aigua, obrint la vàlvula durant el cicle d'ompliment.
• Holding Switch – A single-pole, double-throw type switch that assures completion of a revolution once the icemaker has been energised.
• Interruptor de tancament: un interruptor unipolar de doble acció que atura la producció de gel quan el dipòsit de gel està ple.
• TCO (Thermal Cut Out) – The TCO is a thermal protection device in the wire harness that would open in the event of mechanical failure, thus protecting against overheating (The TCO is not shown in the diagram.)

Figure 5-1. Diagram of Icemaker Components
(For reference only. Individual components are not available for the Service. If problems with the icemaker are discovered, the entire icemaker must be replaced.

FUNCIONAMENT DE LA MÀQUINA DE GEL

The following series of electrical schematics illustrate a typi cal icemaker cycle of operation. Below each schematic is a diagram indicating the approximate loca-tion of the ice ejector and ice level arm during the phase the schematic indicates.
Fase de congelació del cicle de fabricació de gel (vegeu la figura 5-2)

• The ice mould is filled with water.
• El termostat està obert.
• No icemaker components are energised.

Inici de la Primera Revolució (vegeu la figura 5-3)

• The water in the ice mould has turned to ice.
• A -15 °C ± 9 °, el termòstat es tanca.
• The mould heater is energised through the thermostat.
• El motor d'accionament s'engega a través del termòstat i del terminal "normalment tancat" de l'interruptor de manteniment.
• L'expulsor de gel comença a girar i el braç de tancament comença a pujar.

Primera revolució continuada (vegeu la figura 5-4)

• The holding switch is tripped by the timing cam to “normally open,” thus holding power to the motor.
• The moulded heater remains energised through the thermostat.
• El braç de tancament comença a pujar.

Primera revolució continuada (vegeu la figura 5-5)

• The ice ejector reaches the ice in the mould.
• The ice releases from the mould as the ejector blades begin to rotate the cubes out.
• The drive motor remains energised through the holding switch.
• The mould heater remains energised through the thermostat.
• A mesura que el braç de tancament puja, l'interruptor de tancament es dispara a "normalment tancat" i, a continuació, el braç de tancament comença a baixar.

Primera revolució continuada (vegeu la figura 5-6)

• The ice has been released from the mould.
• The motor remains energised through the holding switch.
• El braç de tancament es baixa i l'interruptor de tancament es dispara a "normalment obert".
• The water valve solenoid switch is tripped by the timing cam, but the solenoid is not energised because the thermostat is still closed and energising the mould heater. (Electric current follows the path of least resistance.)

Final de la primera revolució (vegeu la figura 5-7)

• L'interruptor solenoide de la vàlvula d'aigua s'activa mitjançant la lleva de temps que torna a la situació de "normalment oberta".
• La lleva de temporització fa que l'interruptor de retenció s'activi a "normalment tancat", cosa que finalitza la primera revolució, però el termòstat encara està tancat, de manera que el motor es torna a engegar.
• The mould heater remains energised through the thermostat.

Inici de la segona revolució: (vegeu la figura 5-8)

• L'interruptor solenoide de la vàlvula d'aigua s'activa mitjançant la lleva de temps que torna a la situació de "normalment oberta".
• La lleva de temporització fa que l'interruptor de retenció s'activi a "normalment tancat", cosa que finalitza la primera revolució, però el termòstat encara està tancat, de manera que el motor es torna a engegar.
• The moulded heater remains energised through the thermostat.

Segona revolució continuada (vegeu la figura 5-9)

• The mould heater has warmed the thermostat, so the thermostat opens, and the mould heater is de-energised.
• If the shut-off arm comes to rest on top of the ice in the storage bin (as illustrated), the shut-off switch will remain in the “normally closed” position.
• The motor remains energised through the holding switch.

Segona revolució continuada (vegeu la figura 5-10)

The water valve solenoid switch is tripped by the timing cam. This time, the solenoid is energised because the thermostat is open. The water solenoid is open for approximately seven seconds, filling the ice mould with water.
Moulded and energised through the solenoid switch and holding switch.

End of ice-making Cycle (See Figure 5-11)

• The water valve solenoid switch is tripped by the timing cam back to “normally open”, ending the water fill.
• La lleva de temps fa que l'interruptor de retenció s'activi a "normalment tancat", cosa que finalitza la segona revolució.
• El termòstat encara està obert, per tant no engega el motor d'accionament.
• If the shut-off arm has come to rest on top of the ice in the storage bin (as illustrated), the shut-off switch remains in the “normally closed” position.
• Això interromp l'alimentació i evita que arribi al termostat fins que s'hagi tret prou gel del dipòsit d'emmagatzematge, permetent que el braç de tancament baixi.

NOTA: To allow ice to freeze fully and reduce effects of low water pressure, the electronic control system disablesthe icemaker system for 45 minutes after each ice harvest.

ATURAR MANUALMENT LA PRODUCCIÓ DE GEL

Ice production can be manually stopped in two ways:

1. Premeu la tecla “ICE MAKER” del tauler de control perquè la icona del glaçó no es mostri a la pantalla LCD.
2. Col·loqueu el braç de nivell de gel/tancament en la posició superior/OFF (vegeu la figura 5-12).

ENGEGAR MANUALMENT LA MÀQUINA DE GEL
NOTA: To allow ice to freeze fully and reduce the effects of low water pressure, the electronic control disables the icemaker system for forty-five (45) minutes after each ice harvest. To bypass this 45-minute dwell for service purposes, press the “ICE MAKER” key at the con-trol panel to switch the system OFF, then again to switch it back ON.

Procediment d'inici manual

1. Traieu la coberta frontal de la màquina de gel del suport amb un tornavís de punta plana o una moneda.
2. Amb un tornavís de punta plana, gireu l'engranatge d'accionament en sentit antihorari fins que s'activi l'interruptor de retenció, completant el circuit fins al motor d'accionament (això serà aproximadament 1/8 de volta). (Vegeu la figura 5-13)
3. The icemaker will then complete its cycle automatically. NOTE: If after 1/4 turn the icemaker is not running on its own, it may be in the 45-minute dwell period, or there is an electrical or mechanical problem.

ADDITIONAL ICEMAKER SERVICE NOTES

• Manual icemaker water fill time/volume adjustment is not possible on the Integrated Series, as this is a function of the electronic control system and cannot be changed.
• The icemaker system is de-energised for three (3) minutes after a door/drawer switch is opened, then closed. This feature is to help prevent an ice harvest if someone has removed the ice bucket for a brief period.
• Because of this three (3) minute icemaker power interruption, the door/drawer switch(es) must be closed for three (3) minutes after they are opened to check voltage a la màquina de gel.

PROVA DE FALLES DE LA MÀQUINA DE GEL

Bypass the 45-minute dwell by pressing the ICE ON/OFF key to OFF, then again to ON. Now, depress the icemaker rocker switch behind the ice bucket (if present) and manually start the icemaker by turning the driver gear counter-clockwise with a screwdriver.

1. Ifthe  icemaker starts & finishes the cycle:
   (NOTA: Si >15°F, la màquina de gel només completarà 1 revolució.)
   • a. Inspeccioneu visualment les connexions elèctriques del control de pressió i la vàlvula. Repareu si cal.
   • b. Check valve operation with test cord; if it doesn’t open, replace.
   • c. Check thermostat. (Open: 48°F ±6°, Close: 15°F ±3°). Replace the icemaker if defective.
   • d. With the icemaker in park position, check the solenoid switch terminals “C” & “NO” for continuity. With the ejector between 8:00 & 10:00 position, check solenoid switch terminals “C” & “NC” for continuity. If no continuity for either terminal check, replace the icemaker.
2. Si la màquina de gel s'engega però no acaba el cicle:
   • a. With the icemaker in the park position, check the holding switch terminals “C” & “NC” for continuity. Then, withthe icemaker ejector between 10:00 & noon, check holding switch terminals “C” & “NO” for continuity. If no continuity for either terminal check, replace the cemaker. (Refer to enclosed wiring diagram)
   • b. With the icemaker in park position, check shut-off switch terminals “C” & “NO” for continuity. With the ejector between noon & 2:00, check the shut-off switch terminals “C” & “NC” for continuity. If no continuity for either terminal check, replace the icemaker.
   • c. Check the mould heater for 115-125Ω. If outside the range, the heater is bad; replace the icemaker. If the heater checks OK, the thermostat is bad; replace the thermostat.
3. Si el motor de la màquina de gel NO s'engega:
   • a. Braç de tancament inferior
   • b. Check motor operation with test cord. If the motor doesn’t run, replace the ice maker.
   • c. Check power to and from the icemaker rocker switch (if present). Reconnect or repair the connection or replace the switch as necessary.
   • d. Check for power from the control board to the icemaker. If power is present, check the repair of the connection. If no power, replace the control board.

REFERÈNCIA RÀPIDA

• Water Fill Time: 6.3 +0.6/-0.4 seconds
• Fill Tube Heater Ohm: 2850-3890Ω
• Mould Heater Ohm: 115-125Ω
• Water Valve Ohm: 160-165Ω
• Thermostat Open/Close – Open: 48°F ±6° Close: 15°F ±°3
• Water Pressure Needed: 20-120 psi constant
• NOTA: This is a non-filtered water specification, as water Filters are generally rated at 35-120 psi.

SOLUCIÓ DE PROBLEMES DE LA MÀQUINA DE GEL

Cap / Producció lenta de gel

1.  Ice maker system switched OFF. Switch the system ON.
2. Apagueu el braç en la posició amunt/OFF. Moveu-lo a la posició ON.
3. The freezer is too warm. Check temps & see the troubleshooting guide in the service manual.
4. Flux d'aire deficient sobre la màquina de gel. Traieu les obstruccions.
5. Encallament de glaçons. Traieu el gel i comproveu el nivell d'ompliment d'aigua.
   • a. Water fill setting is too low (< 6 seconds). Adjust fill setting.
   • b. Water fill setting is too high (> 7 seconds). Adjust fill setting.
6. Water froze in the inlet tube. Remove ice from the tube. Check for power from the control board to the fill tube heater; Fill tube heater = 2850-3890Ω.
7. Water supply not constant, 20-120 psi. InstInstruct thetomer.
8. The water line to the unit is kinked/clogged. Repair the water line.
9. Supply line: Saddle valve not installed correctly. Reposition.
10. La vàlvula de sella no està completament oberta. Obriu la vàlvula completament.
11. Cable/connexions de la màquina de gel soltes/trencades. Repareu el cablejat.
12. Cable/connexions de la vàlvula d'aigua soltes/trencades. Repareu el cablejat.
13. Defective water valve. Check valve Ohms, Replace valve. The
14. Thermostat wire/connections are loose/broken. Repair wiring.
15. TCO overheat or shorts. Fix the cause or replace the icemaker.
16. Vegeu Proves d'errors de la màquina de gel.

Sense omplir d'aigua

1. Water supply switched OFF. Switch the supply water line ON.
2. The water line tothe unit is kinked/clogged. Repair the water line.
3. La vàlvula de sella no està instal·lada correctament a la línia de subministrament. Reposicioneu-la.
4. Water froze in the inlet tube. Remove ice from the tube. Check for power from the control board to fill the tube heater; Fill the tube heater = 2850-3890Ω.
5. Cable/connexions de la vàlvula d'aigua soltes/trencades. Repareu el cablejat.
6. Defective water valve. Check valve Ohms, Replace valve.

Overflows / Ice Block Forms in Bucket / Oversized..
The icemaker is not level. Level icemaker.

1. Unitat no anivellada. Unitat anivellada.
2. Water supply not constant, 20-120 psi. Instruct the ustomeWater customersomere in the inlet tube.
3. Remove ice from the tube. Check for power from the control board to the fill tube heater; Fill tube heater = 2850-3890Ω.
4. Water fill settings are too low (< 6 seconds). Adjust fill setting. The water fill setting is too high (> 7 seconds). Adjust fill setting.
5. Defective water valve. Check valve Ohms, Replace valve.

Cubs de gel buits o petits

1. The icemaker is not level. Level icemaker.
2. Unitat no anivellada. Unitat anivellada.
3. Subministrament d'aigua no constant, 20-120 psi. Instruïu el client.
4. The water fill setting is too low (< 6 seconds). Adjust fill setting.
5. Too little thermal mass on the thermostat. Addthermoplasticc.
6. Termòstat defectuós (Obert = 48 °C ± 6 °C, Tancat = 15 °C ± 3 °C).
7. Substituïu la màquina de gel.

Massa gel

1. Shut off arm/linkage bent/broken. Repair or replace the arm linkage.
2. If ejector blades rotate withthe arm in the up/OFF position = Icemaker is faulty. Replace the icemaker.

Documents/Recursos

Màquina de gel SUB-ZERO 7028783 [pdfManual d'instruccions Alt, Columna-39, 7028783 Màquina de gel, 7028783, Màquina de gel, Màquina

Referències

• Manual d'usuari