Omcan Food Machinery IC-CN-0040 Installation Manual

Ice Maker

Model IC-CN-0040

Instruction Manual

Revised - 1/5/2015

Toll Free: 1-800-465-0234

Fax: 905-607-0234

Email: sales@omcan.com

www.omcan.com

Table of Contents

Model IC-CN-0040

Section

General Information

Safety & Warranty

Technical Specications

Installation

Operation

Maintenance

Troubleshooting

---------------------------------------------------------------------------------------------------------- 7

----------------------------------------------------------------------------------------------------- 8 - 10

----------------------------------------------------------------------------------------------- 10 - 13

----------------------------------------------------------------------------------------- 3 - 4

------------------------------------------------------------------------------------------------ 4

------------------------------------------------------------------------------------------- 13 - 20

Page

------------------------------------------------------------------------------------ 5 - 6

French Instructions

Spanish Instructions

Parts Breakdowns

Electrical Schematics

Notes

Warranty Registration

-------------------------------------------------------------------------------------------------------------- 58

--------------------------------------------------------------------------------------- 20 - 36

---------------------------------------------------------------------------------------- 55 - 56

------------------------------------------------------------------------------------- 37 - 54

------------------------------------------------------------------------------------------ 57

----------------------------------------------------------------------------------------- 59

General Information

Omcan Manufacturing and Distributing Company Inc. and Food Machinery of America, Inc. dba Omcan are not responsible for any harm or injury caused due to any person’s improper or negligent use of this equipment. The product shall only be operated by someone over the age of 18, of sound mind, and

not under the inuence of any drugs or alcohol, who has been trained in the correct operation of this machine, and is wearing authorized, proper safety clothing. Any modication to the machine voids any warranty, and may cause harm to individuals using the machine or in the vicinity of the machine while

in operation.

CHECK PACKAGE UPON ARRIVAL

Upon receipt of an Omcan shipment please inspect for external damage. If no damage is evident on the external packaging, open carton to ensure all ordered items are within the box, and there is no concealed damage to the machine. If the package has suffered rough handling, bumps or damage (visible or concealed), please note it on the bill of lading before accepting the delivery and contact Omcan within 24 hours, so we may initiate a claim with the carrier. A detailed report on the extent of the damage caused to the machine must be

lled out within three days, from the delivery date shown in the shipping documents. Omcan has no recourse

for damaged products that were shipped collect or third party.

Omcan Fabrication et distribution Companie Limité et Food Machinery d’Amerique, dba Omcan ne sont pas responsables de tout dommage ou blessure causé du fait que toute personne ait utilisé cet équipement de façon irrégulière. Le produit ne doit être exploité que par quelqu’un de plus de 18

ans, saine d’esprit, et pas sous l’inuence d’une drogue ou d’acohol, qui a été formé pour utiliser cette machine correctement, et est vêtu de vêtements de sécurité approprié. Toute modication de la

machine annule toute garantie, et peut causer un préjudice à des personnes utilisant la machine ou des personnes à proximité de la machine pendant son fonctionnement.

VÉRIFIEZ LE COLIS DÈS RÉCEPTION

Dès réception d’une expédition d’Omcan veuillez inspecter pour dommages externes. Si aucun dommage

n’est visible sur l’emballage externe, ouvrez le carton an de s’assurer que tous les éléments commandés

sont dans la boîte, et il n’y a aucun dommage dissimulé à la machine. Si le colis n’a subi aucune mauvaises manipulations, de bosses ou de dommages (visible ou cachée), notez-le sur le bond de livraison avant

d’accepter la livraison et contactez Omcan dans les 24 heures qui suivent, pour que nous puissions engager

une réclamation auprès du transporteur. Un rapport détaillé sur l’étendue des dommages causés à la machine

doit être rempli dans un délai de trois jours, à compter de la date de livraison indiquée dans les documents d’expédition. Omcan n’a aucun droit de recours pour les produits endommagés qui ont été expédiées ou cueilli

par un tiers transporteur.

Omcan Empresa De Fabricacion Y Distribucion Inc. Y Maquinaria De Alimentos De America, Inc. dba Omcan no son responsables de ningun daño o perjuicío causado por cualquier persona inadecuada o el uso descuidado de este equipo. El producto solo podra ser operado por una persona mayor de 18

años, en su sano juicio y no bajo alguna inuencia de droga o alcohol, y que este ha sido entrenado en el correcto funcionamiento de esta máquina, y ésta usando ropa apropiada y autorizada. Cualquier modicación a la máquina anúla la garantía y puede causar daños a las personas usando la máquina

mientras esta en el funcionamiento.

General Information

REVISE EL PAQUETE A SU LLEGADA

Tras la recepcion de un envio Omcan favor inspeccionar daños externos. Si no hay daños evidentes en el

empaque exterior, Habra el carton para asegurararse que todos los articulos solicitados ésten dentro de la caja y no encuentre daños ocultos en la máquina. Si el paquete ha sufrido un manejo de poco cuidado, golpes

o daños (visible o oculto) por favor anote en la factura antes de aceptar la entrega y contacte Omcan dentro

de las 24 horas, de modo que podamos iniciar una reclamación con la compañia. Un informe detallado sobre los daños causados a la máquina debe ser llenado en el plazo de tres días, desde la fecha de entrega que se muestra en los documentos de envío. Omcan no tiene ningun recurso por productos dañados que se enviaron

a recoger por terceros.

Safety and Warranty

• Turn the unit off and unplug before performing any cleaning, maintenance or repairs.

• Do not operate the unit with a damaged power cord. If a damaged power cord is found, immediately turn

the unit off and unplug it. Do not operate again until trained personnel has xed the problem.

• Only operate the unit in a at, level ground. Do not place the unit near any heat sources.

• Only use original spare parts for repairs.

1 YEAR PARTS AND LABOUR WARRANTY

Within the warranty period, contact Omcan Inc. at 1-800-465-0234 to schedule an Omcan authorized

service technician to repair the equipment locally.

Unauthorized maintenance will void the warranty. Warranty covers electrical and part failures not

improper use.

WARNING:

The packaging components (cardboard, polyethylene, and others) are classied as normal solid urban waste and can therefore be disposed of without difculty.

In any case, for suitable recycling, we suggest disposing of the products separately (differentiated waste) according to the current norms.

DO NOT DISCARD ANY PACKAGING MATERIALS IN THE ENVIRONMENT!

Technical Specications

MAIN COMPONENTS

1. Compressor

2. Discharge Tube

3. Three Ways Adapter

4. Condensers

5. Drier and Filter

6. Capillary Tube

7. Connection Tube

8. Hot Gas Valve

9. Hot Gas Tube

10. Evaporator

11. Fan Blade

12. Suction Pipe

13. Motor (5W)

14. Motor (10W)

15. Temperature Sensor of Evaporator

16. Temperature Sensor of Condenser

17. Controller

Technical Specications

MAIN COMPONENTS

1. Water Supply Tube

2. Water Inlet Connector

3. Nut of Water Inlet Tube

4. Supporting Tube

5. Water Pump Inlet Tube

6. Floater Valve

7. Water Trough

8. Water Pump

9. Water Pump Outlet Tube

10. Ice Slideway

11. Water Distribution Tube

12. Evaporator

13. Magnetic Switch

14. Gasket

15. Screw Cap

Installation

Note: Installation should be performed by a trained Service Technician. For proper operation of the ice machine, the following installation guidelines must be followed. Failure to do so may result in loss of production capability, premature part failure, and may void any warranties.

AMBIENT OPERATING TEMPERATURES

Minimum Operating Temperature: 50°F (10°C). Maximum Operating Temperature: 100°F (38°C). Note: The unit is not designed for outdoor use.

INCOMING WATER SUPPLY

Minimum incoming water temperature: 40°F (5°C). Maximum incoming water temperature: 90°F (32°C). Minimum incoming water pressure: 15 psig. Maximum incoming water pressure: 80 psig. Note: If water pressure exceeds 80 psig, a water pressure regulator must be installed.

DRAINS

Route bin drain, purge drain and water condenser drain must be individually connected to a oor drain. The use of condensation pumps for draining water on equipment should not produce over 200 lbs./day. Omcan assumes no responsibility for improperly installed equipment.

WATER FILTRATION

A water lter system should be installed with the ice machine.

CLEARANCE REQUIREMENTS

The unit must have a minimum of 6 inches (15 cm) of clearance at the rear, top, and sides of the ice machine for proper air circulation. When using models which are located under the counter, circulation occurs from the front. Top and side clearances are minimal.

STACKING

If the ice machines are to be stacked, refer to the instructions described later in this manual. Omcan does not recommend stacking the unit.

DISPENSER APPLICATION

A thermostatic bin control kit must be installed if the ice machine is placed on a dispenser. A bin top may or

may not be required.

Operation

There are 3 systems: the Cooling System, the Water System and the Electrical System.

During the ice-making stage, the hot gas valve is closed. The hot refrigerant gas is pumped out of the compressor to the condenser. The hot gas is cooled by a fan after passing through the condenser. The drier

and lter will reduce possible dirt and moisture in the refrigerant. The refrigerant expands in the evaporator

cooling so water will freeze. The low pressure refrigerant gas returns to the compressor from the evaporator where the cycle continues. During the ice harvest stage, the valve is open. The hot refrigerant gas is pumped out of the compressor to the evaporator through the hot gas valve. Since the hot gas i not cooled by the condenser, the refrigerant warms the evaporator. Ice in contact with the evaporator begins to melt on the back side. The ice gradually ice slides off of the evaporator and drops to the storage bin. When the water inlet is

connected with the main water supply, water will ll the trough through the oat valve until the water level

in the trough closes the valve. During the ice-making stage, water is pumped from the water trough to the

water distribution tube. The distributed water ows over the surface of the cold evaporator where the water is

converted to ice. The unfrozen water will return to the trough. At the end of the freeze cycle and during harvest, the water dump valve is opened and the remaining water is pumped down the drain.

CIRCUIT DESCRIPTION

1. First time usage: The ice-maker must be properly installed. Switch the water tap on, let the water trough

ll, then turn the power switch to the ON position on the back panel. The ice-maker will start working automatically. In this stage, the time is xed about 3 minutes. At this status, the White, Green, Yellow and

Red LEDs are light together.

2. Ice-making Status: The compressor, motor fan and pump are on. The hot gas valve is off. When the green LED is lit, the unit is working in the ice making mode controlled by a temperature probe on the evaporator.

When the green LED is ashing, the unit is working in the ice making mode controlled by a xed timer. The

fan motor is also controlled by the condenser sensor. When the ambient temperature is too low, the motor fan stops working.

3. Ice Harvest Status: The pump is off. The hot gas valve, compressor and motor fan are on. The fan motor is also controlled by the condenser sensor. When the ambient temperature is too low, the motor fan stops

working. The Yellow LED indicates the ice harvest status.

4. Ice Full Status And Cold Preservation Stage: If the ice bin is lled with ice, the machine stops making ice and turns to the cold preservation stage automatically. In this stage, the compressor works regularly to keep the low temperatures so ice does not melt. The rest of the electric components are off. The

WHITE LED indicates the ice full status and the GREEN AND YELLOW LEDs together indicates the cold

preservation status.

5. Cleaning Status: Turn the machine’s CLEAN SWITCH to CLEAN for 3 minutes after the POWER SWITCH

is turned on. At this stage, the pump is on. Compressor, motor fan and are off. The GREEN and YELLOW LEDs are ashing together. To stop the cleaning mode, turn the machine “OFF” or the unit will turn off

automatically after 30 minutes. NOTE: In order to start the Clean Status the unit must be on. The CLEAN switch must be turned on within 3 minutes before the COMPRESSOR starts. Do not turn the CLEAN switch on when machine is in ice-making status or ice-harvest status.

CONTROLLER BOX

Instructions for LEDs and buttons:

Operation

1. White LED: Ice full indicator light. When this LED is lit, the ice storage bin is full of ice or there is something between the ice-full sensor and the evaporator. The unit will stop making ice. When ice cubes are taken out

of the ice storage bin making the ice-full probe free, the white LED will ash for 3 minutes. Then the unit will

restart and return to the ice making mode.

2. Green LED: Ice making indicator light. When this LED is lit, the unit is working in the ice making mode

controlled by a temperature probe on the evaporator. When the green LED is ashing, the unit is working in the ice making mode controlled by a xed timer.

3. Yellow LED: Ice harvest indicator light. When this LED is lit, the unit is working in the ice harvest mode controlled by ice-full probe. When green LED and yellow LED is lit, it means the unit is working in the cold preservation stage .

4. Red LED: power indicator light. The unit is on when the red LED is lit.

5. Mode button: Mainly for service. When this button is pressed, it can change from ice making mode to ice

harvest mode, or from ice harvest mode to ice making mode. You can see the change of the mode from the

status of the green and yellow LEDs.

NOTE: If during the ice size adjustment, the “BIN FULL”, “ICE” and “HARVEST” LEDS blink all at once, this

indicates that the unit is in the default factory setting of the ice size adjustment.

CONTROL BOARD CHECKS

Timer Initiate

The timer initiate is a temperature sensor mounted on the liquid line to the evaporator. When the sensor

detects the correct low temperature, the freeze timer starts and the machine enters the timed portion of the freeze cycle. When the freeze timer starts, the machine is in the timed portion of the freeze cycle. When the machine enters harvest, the temperature rises, but the amount of time the machine is in harvest is predetermined and is controlled by the Controller Board. Once the time has passed, the machine will enter the harvest cycle. The timer is not adjustable, but the temperature at which the timer is initiated is adjustable.

ICE SIZE ADJUSTMENT

1. Press and hold the “Clean” button and the “Mode” button together for at least 3 seconds. The unit will enter the Ice Size Adjustment mode. The GREEN LED will be blinking continuously during the ice size

adjustment.

2. While in the Ice Size Adjustment mode, press the “Clean” button or the “Mode” button for the desired ice size.

Smaller ice setting: By pressing the “Clean” button, you can decrease the size of the ice cubes. The RED LED will ash as you lower the ice size and will nally be blinking at the setting of smallest ice size.

Larger ice setting: By pressing the “Mode” button, you can increase the size of the ice cubes. The YELLOW LED will ash as the larger size is set and will blink when the setting of largest ice size has been reached. After

10 seconds without any operation, the unit will automatically memorize the current setting and return to the previous mode.

Operation

BIN CONTROL OPERATION

The bin control is used to shut the machine off when the bin lls with ice. The bin control must be checked

upon installation or initial startup and when performing maintenance. There is one bin switch for each evaporator. The actuator arm of the bin switch comes in contact with the splash curtain. When the bin is full of ice, the splash curtain is held open when ice drops off of the evaporator. This releases the pressure of the bin switch actuator arm allowing the switch to open. Units placed under counters and machines without curtains: An ice slide at the bottom of the evaporator is used on all under the counter units and some modular units. The slideway swivels up and down and has a magnetic reed switch which detects its position. When ice is sitting on the control, the slideway faces down indicating that ice is present (and disconnecting the circuit from the reed switch). When the ice is removed, the slideway swivels up and the connection is completed allowing the machine to begin producing ice again.

BIN CONTROL ADJUSTMENT

All Models (except those without curtains): Check the bin switch for proper adjustment by swinging the bottom of the curtain away from the evaporator. Slowly bring the curtain towards the evaporator. The switch should close when the bottom edge of the curtain is even with the outer edge of the water trough. Adjust the switch by loosening the screws which hold the switch in place. Move the switch to the proper position and retighten the screws. Recheck the adjustment. Under the counter models or those without curtains: There are no adjustments needed for the bin (magnetic reed) switch.

Maintenance

Before Maintenance:

1. Be sure the electrical supply is 115 VAC, 60Hz, 15A and is properly grounded to protect maintenance personnel.

2. If any electrical parts are loose or if there is a danger of short circuiting, disconnect the power immediately.

MAINTENANCE PROCEDURE

1. Cleaning should be performed at least every 6 months. Local water conditions may require that cleaning be performed more often.

2. Check the ice bridge thickness. The thickness should be between 1/16-1/8’’.

3. Check the water level in trough. Check for proper water level and adjustment and troubleshoot if there is an

Maintenance

incorrect level.

4. Clean the condenser to ensure proper air ow.

5. Check for leaks of any kind: Water, Refrigerant, Oil, Etc.

6. Check the bin switch for proper adjustment.

7. Check all electrical connections.

8. Check the oil of the fan motor if applicable.

CLEANING AND SANITIZING

Problems may occur if the following procedures are not performed every 6 months:

1. Remove the front panel.

2. Make sure that there is no ice on the evaporator. If there is, wait until operation is nished and turn the

machine “OFF”.

3. Remove or melt all ice in the storage bin.

4. Add the recommended amount of approved cleaner to the water trough according to label instructions on the container.

5. Initiate the clean cycle at the controller board switch by turning the machine on and switching to the

“CLEAN” setting. Note: This must be done within 3 minutes of turning the machine “ON”. Allow the cleaner

to circulate for approximately 15 minutes to remove mineral deposits.

6. After 15 minutes (or 30 minutes automatically), stop the process and drain. Rell with clean water and run for another 5 minutes, then drain again. Fill the trough with fresh incoming water.

7. Stop the wash cycle by positioning the switch to the “OFF” position. Remove the splash curtain (if applicable) and inspect the evaporator and water spillway (the plastic top of the evaporator) to assure all mineral residue has been removed.

8. If necessary, wipe the evaporator, spillway and other surfaces with a clean soft cloth to remove any remaining residue. If necessary, remove the water distribution tube, disassemble and clean with a

bottlebrush. Reassemble all components and repeat steps 4 through 7 as required to remove residue.

9. Turn the unit OFF and clean the water trough thoroughly to remove all scale or slime buildup. If necessary, remove the water trough to reach all splash areas.

10. Prepare 1½ to 2 gallons (5.7 to 7.5 liters) of approved (EPA/FDA) sodium hypochloride food equipment sanitizer to form a solution with 100 to 200 ppm free chlorine yield.

11. Add enough sanitizing solution to ll the water trough to overowing and activate the switch to the “CLEAN”

position and allow circulation to occur for 10 minutes and inspect all disassembled ttings for leaks. During this time, wipe down all other ice machine splash areas and the interior surfaces of the bin, deector

and door with the remaining sanitizing solution. Inspect to make sure that all functional parts, fasteners, thermostat bulbs (if used), etc. are in place.

12. After 3 minutes, stop the process and drain. Rell with clean water run another 5 minutes and drain again. Fill the trough with fresh incoming water.

13. Place the switch to the “ON” position and replace or close the panel. Discard the rst two ice harvests.

Maintenance

ADJUSTMENT AND REPLACEMENT

ELECTRICAL SHOCK HAZARD

Disconnect electrical power before beginning removal of parts

REPLACING CONTROL BOX AND TEMPERATURE SENSOR

• Remove the rear cover and the front or side panel.

• Locate the electronic control box in the unit.

• Carefully pull out the temperature sensors (one at the evaporator, another at the condenser).

• Loosen the screws holding the control box and replace. Reverse the previous steps to reassemble.

• If you need to replace a temperature sensor, pull out the sensor, open the panel of the control box, pull out

the other end of the sensor and replace. Reverse these steps to reassemble.

REPLACING THE WATER PUMP

• Turn the unit off and unplug it from the socket.

• Remove the front cover.

• Unplug the lines connected with the water pump, including the water outlet tube.

• Loosen the screws. Replace the pump with a new one.

• Reverse the above steps to reassemble.

REPLACING THE COOLING SYSTEM COMPONENTS

To replace the condensing components, see the Cooling System gure.

• Remove the top panel and left

panel, locate the compressor, take off the clip and replace the defective components.

• Reverse the above steps to reassemble.

ELECTRICAL SHOCK HAZARD

• Turn the unit off and unplug it form the socket.

• If the compressor needs to be replaced, remove the top cover and locate the compressor.

Maintenance

• Unplug the lines and remove the ground line, open the Process/Suction, remove the refrigerant, take out

the compressor and replace it.

• Reverse the above steps to reassemble.

REPLACING THE FAN MOTOR AND FAN BLADE

• Remove the top and right panels.

• Locate the fan motor, unplug the lines connected with the fan motor, loosen the screws of the holding

bracket and fan motor bracket, remove the damaged unit and replace with a new one.

• Reverse the above steps to reassemble.

REPLACING THE HOT GAS VALVE, DRIER AND EVAPORATOR

• Remove the top panel.

• Remove the refrigerant. Locate the drier and hot gas valve, open weld, replace the drier and hot gas valve,

and weld. Replace the refrigerant.

• Reverse the above steps to reassemble.

• If needed, replace the evaporator.

• Remove the refrigerant. Remove the front and top panels, locate the evaporator, open the Process/Suction,

open the two welds, replace with a new evaporator. Replace the refrigerant. Reverse the above steps to reassemble.

Troubleshooting

Machine does not run.

Step Check If yes, proceed to If no, proceed to

A1 Is the switched turned to on? Turn on A2 A2 Is there power to the machine? Rewire A3 A3 Is the bin full? A4 Take ice out A4 Is the bin control adjusted? Adjust A5 A5 Is the high pressure safety switch

tripped?

A6 Is the selector switch out? Replace

Machine runs but does not produce ice.

Step Check If yes, proceed to If no, proceed to

B1 Is water running over the

evaporator?

B2 Is the compressor running? B5 B3

A6 Reset clean condenser

The following troubleshooting chart.

Troubleshooting

B3 Is there power to the

compressor? B4 Is the switch defective? Replace B5 Is there water leaking from the

trough? B6 Is the refrigerant pressure high? Clean the condenser or

B7 Is the refrigerant pressure low? Check for leaks B8 B8 Is there a low side restriction? Repair TXV is defective

Machine produces cloudy or incomplete cubes.

Step Check If yes, proceed to If no, proceed to

C1 Is water running over the

evaporator? C2 Is the machine level? The incoming water quality

C3 Is the trough water level correct? C6 C4 C4 Is the supply pressure correct? C5 Correct deciency C5 Is there a water leak? Repair the leak Adjust oat valve C6 Is the water distribution tube

plugged correctly? C7 Is the water pump damaged? Replace/Repair pump Clean evaporator spillway

Repair the leak B6

check HGV

C2 C3

is poor.

Clean/replace C7

Check for bad connection or starting components

Level the unit

Produces proper cubes but is slow in production.

Step Check If yes, proceed to If no, proceed to

D1 Is the unit installed correctly? D2 Correctly install the unit D2 Is the head pressure too high? D3 Check refrigeration system D3 Is the condenser clean? Check refrigeration system Clean

Cubes are hollow.

Step Check If yes, proceed to If no, proceed to

E1 Is the water temperature above

100°F? E2 Is there good ow over the

evaporator? E3 Is there water leaking from the

purge? E4 Does the cube adjuster work? Reset cube size E5 E5 Is the evaporator sensor loose? Tighten E6

Correct the temperature E2

E3 Go to section C

Replace valve E4

Troubleshooting

E6 Is the evaporator sensor wire

tight? E7 Is the controller damaged? Replace

Bridge thickness is uneven.

Step Check If yes, proceed to If no, proceed to

F1 Is the water temperature above

100°F? F2 Is the water running into the bin? Check sections C,D, E or

F3 Is water leaking from the purge? Replace the valve F4 F4 Is the suction pressure high? Check the hot gas valve Recharge and/or check the

Bridge thickness varies with each cycle.

Step Check If yes, proceed to If no, proceed to

G1 Is the water temperature proper? Correctly adjust temperature G2 G2 Is the purge valve leaking? Replace valve G3 G3 Is the hot gas valve damaged? Replace G4 G4 Are sensors connected to the

board?

G5 Is the controller damaged? Replace G6 G6 Is the thermal expansion valve

damaged?

E7 Tight the spade connection to

the board

Correct the temperature F2

check trough for leak

TXV

G5 Tighten spade connections

Replace

Machine does not start producing ice cubes.

Step Check If yes, proceed to If no, proceed to

H1 Does the purge valve work? H6 H2 H2 Is the freeze pattern even? H3 H2 H3 Is the purge valve leaking? Replace H3 H4 Is the compressor failing? Replace H4 H5 Is the system supplied with too

much voltage?

H6 Is the relay defective? Replace H7 H7 Is the board defective? Replace

Machine harvests but returns to ice-making prematurely.

Step Check If yes, proceed to If no, proceed to

I1 Is the manual purge open? Replace purge valve I2

Adjust the voltage Replace TXV

Troubleshooting

I2 Is the high temperature safety

switch open? I3 Is the relay damaged? Replace

Length of harvest is excessive.

Step Check If yes, proceed to If no, proceed to

J1 Is the machine installed correctly? J2 Correct J2 Is ice forming correctly? J3 Low charge - recharge J3 Is the suction pressure too low? Replace the hot gas valve J4 J4 Is the evaporator clean? J5 Clean accordingly J5 Is the ice bridge correct? J6 Go to F or G sections J6 Is the machine level? J7 Level the unit J7 Does water run over the

evaporator during harvest? J8 Is the purge valve leaking? Replace J9 J9 Is the relay damaged? Replace J10 J10 Is the selector switch damaged? Replace J11 Is the suction pressure damaged? Replace evaporator J12 J12 Is the discharge pressure low

during freezing?

Replace I3

Clean or J11 J8

Ambient temperature is too low

Replace the hot gas valve

Evaporator gets hot.

Step Check If yes, proceed to If no, proceed to

K1 Is the unit installed correctly? K2 Correctly install the unit K2 Is the condenser fan turning? K3 Tighten the blade, check the

wires or replace the motor

K3 Are the hot gas valve connections

loose? K4 Is the machine charged correctly? K5 Charge correctly K5 Is the controller operating

correctly?

The compressor does not start.

Step Check If yes, proceed to If no, proceed to

L1 Is the condenser dirty? Clean L2 L2 Has the fan stopped or is dirty? Repair/clean L3 L3 Are the wires tight on the

controller?

Tighten all wiring connections

Replace the hot gas valve Replace the controller board.

L4 Tighten all spade connections.

Troubleshooting

L4 Are the compressor starting

components damaged? L5 Is the controller board damaged? Replace L6 L6 Is the compressor damaged? Replace

Compressor runs but no ice is produced.

Step Check If yes, proceed to If no, proceed to

M1 Is the air vent obstructed? Clear the path M2 M2 Is the condenser dirty? Clean M3 M3 Is the fan turning? M4 Replace fan motor M4 Is there a refrigerant leak? Add the valve, clean the

M5 Is the TXV or cap tube operating

normally?

M6 Does the ice making mode

convert to harvest?

Machine makes excessive noise.

Step Check If yes, proceed to If no, proceed to

N1 Are the panels loose? Tighten all the screws N2 N2 Is the fan hitting the shroud? Realign N3 N3 Is the fan blade loose? Tighten N4 N4 Is the pump noisy? N5 N6 N5 Is there an object in the propeller? Remove the object Replace the pump N6 Is the noise from the compressor? Replace the compressor

Replace components L5

refrigerant, x and charge (replace lter)

M6 Add the valve, clean the

refrigerant, x and charge (replace lter)

Replace the controller board

ADVANCED COMPONENT TROUBLESHOOTING TECHNIQUES

Refrigerant Cycle and Components

Before diagnosing the refrigeration system, it is very important that the refrigeration charge is correct.

Whenever the refrigeration system has been opened, the lter drier must be replaced and the proper

refrigerant charge must be weighed in.

Refrigerant Pressures

The suction pressure at the beginning of the freeze cycle can vary +/10 psi (.7 bar) depending on operating

conditions. Pressures less than this may indicate an undercharge. The discharge pressure on air cooled units will vary with ambient conditions. Refrigerant in a gas state is pumped throughout the refrigeration system by

Troubleshooting

a hermetic compressor to the condenser. Heat is removed from the refrigerant either by forced air movement

through an air cooled condenser or transferring heat from the refrigerant to water through a water cooled

condenser. The refrigerant changes to a liquid when cooled. The refrigerant in a liquid state passes through a lter drier. The lter drier traps small amounts of moisture and foreign particles from the system. The lter drier

must be replaced whenever the refrigeration system is opened or if the refrigerant has been completely lost.

Compressor

The compressor runs during the entire cycle. If the valves in the compressor are damaged, the compressor

will be unable to pump refrigerant efciently. Damaged valves may be the result of another problem in the

refrigeration system. When a compressor is replaced it is important that the refrigeration charge be weighed

in and the system checked for proper operation to prevent a repeat failure. An inefcient compressor will

usually have a higher than normal suction pressure at the end of the cycle. The freeze cycle will be longer

than normal and/or the harvest cycle may be excessively long. Check the compressor’s amps 5 minutes into the freeze cycle. If the amps is less than 70% of rated full amount, the compressor may be inefcient. These

symptoms may also be caused by other problems, therefore it is important to use the troubleshooting charts when diagnosing a problem. The air condenser is located in the back of the cabinet. Air is pulled through the condenser by a fan motor and released through the right hand side panel. Under the counter models intake

and discharge air through the front panel. Do not block airow as it will cause premature failure of the machine

and will void the warranty.

Compressor and Start Components

The compressor should run during the entire cycle. If the machine is in the ON position but the compressor is not running, check the compressor contactor to see if it is connected properly. If the contactor is not connected, the problem is not with the compressor or the compressor start components. If the contactor is engaged and there is correct voltage through the contactor, there could be a problem with one of the starting components or the compressor. It is recommended that the compressor starting components be replaced when replacing the compressor.

DISCONNECT POWER BEFORE SERVICING!

If the compressor uses an internal overload, be certain that the compressor has cooled and the overload has reset before diagnosing the compressor. If the compressor is cool and is still not running, check the

compressor motor windings by rst removing the wires at the compressor terminals. With an ohmmeter, check

for continuity between all three terminals, if an open circuit exists between any of the terminals, the compressor may need to be replaced. Check for continuity from each terminal to the compressor body, if continuity is found from any terminal to the compressor body, the compressor windings are shorted to ground and the compressor will need to be replaced. If the compressor appears to be good at this point, it is advisable to use a compressor analyzer to isolate the compressor from the start components while checking for a locked rotor. If it is not available, the compressor starting components must be checked. If all starting components are working, check the amp rating from the terminal of the compressor, making sure proper voltage is supplied to the compressor and all wiring is properly connected. If the compressor does not start and there is excessive amp rating, (see locked rotor amps on compressor tag) the compressor has a locked rotor and should be replaced.

+ 42 hidden pages