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Narvon 378SM261 Service Manual

2.6 gallon bowl frozen beverage dispensers
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SERVICE MANUAL
2.6 GALLON BOWL
FROZEN BEVERAGE
DISPENSERS
#378SM261
#378SM262
#378SM263
SINGLE BOWL
DOUBLE BOWL
TRIPLE BOWL
NOTICE
This manual is for a certified service technician and should not be used by those who are not properly trained.
This manual cannot cover all possible conditions that may occur and is not intended to be all encompassing.
You should read this manual in its entirety and the specific repair you wish to do prior to starting the repair.
This will allow you to determine if you have the correct tools, instruments, and skills to perform the procedure.
REVISED: 08/2021

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Summary of Contents for Narvon 378SM261

  • Page 1 SERVICE MANUAL 2.6 GALLON BOWL FROZEN BEVERAGE DISPENSERS #378SM261 #378SM262 #378SM263 SINGLE BOWL DOUBLE BOWL TRIPLE BOWL NOTICE This manual is for a certified service technician and should not be used by those who are not properly trained. This manual cannot cover all possible conditions that may occur and is not intended to be all encompassing.

  • Page 2: Table Of Contents

    Wire Diagram Double Bowl ..... . 22 Wire Diagram Triple Bowl......23 NARVON...

  • Page 3: Specifications

    . Failure to include one or more of these items will extend the processing time . SERIAL PLATES NOTE: All units are labeled with model numbers, ITEM #: 378SM261 MADE IN ITALY voltage, wattage, refrigerant gas, serial number MFR MODEL #: OASIS 1-10 and certifications on the rear of the unit SPECS: 1 x 2.6 GAL •...

  • Page 4: Initial Setup

    Use a refractometer to ensure the correct percentage BOWL CONTROL SWITCHES Beverage Control Switch (A) O = Cooling Off I = Slushy/Frozen Mode II = Cold Drink Mode Auger Control Switch (B) O = Auger Off I = Auger On NARVON...

  • Page 5: Preventative Maintenance

    10 . Remove the bowl gasket by pulling it away from the rear of the unit (Fig . 7) 11 . Remove drip tray by lifting it up and then pulling away from the unit (Fig . 8) Continued on next page NARVON...

  • Page 6: Sanitizing

    SM263 - Remove the side panel (Fig . 10) Fig. 10 4 . Use a soft, dry, and clean brush to remove dust from the condenser coil fins NOTE: DO NOT bend coil fins 5 . After cleaning, replace back or side panel NARVON...
  • Page 7 Blade Seal (Fig . 13) 5 . Lubricate the Front Shaft Seal before inserting into the bowl 6 . Lubricate the Tap Valve, Tap Valve Lever Pins, and Tap Valve Spring prior to installing in the front of the Bowl Fig. 13 NARVON...

  • Page 8: Troubleshooting

    Auger blade is not Ensure the I "FROZEN" option is selected on drink type switch spinning and bowl is Ensure the thickness control is adjusted correctly not frozen Check the motor gearbox, reference page 12 Check microswitch, reference page 13 NARVON...
  • Page 9 Ensure master light switch is "ON" LED light in lid is not Check fuse, reference page 19 Check electric contact shafts going into Lid, reference page 10 Check wiring inside lid assembly, reference page 10 Check LED lid light, reference page 10 NARVON...

  • Page 10: Part Replacement

    PART REPLACEMENT PRE-MAINTENANCE NOTE: Follow these pre-maintenance steps before servicing your Narvon Equipment Slushy Machine 1 . Empty all product from the bowl(s) via the dispensing tap into a food safe container 2 . Turn off the unit 3 . Disconnect from the power supply BOWL LID PARTS Fig.

  • Page 11: Motor Gearbox Parts

    8mm socket or wrench (Fig . 20 A) 5 . Before installing new motor gearbox support (#378PSM227), it must be lubricated (401PETROGEL) in the cylindrical hub that holds the motor gearbox . (Fig . 20 B) 6 . Reassemble by reversing the steps NARVON...
  • Page 12 (Fig . 24) 15 . Reassemble by reserving the removal steps and lubricating the drive shaft end that engages the auger transmission shaft (Fig . 25) NARVON...
  • Page 13 (Fig . 26) 17 . Pull microswitch from unit to access wiring 18 . Move wiring from old switch to new switch (#378PSM229), note location of connections (Fig . 27) 19 . Reassemble by reversing removal steps NARVON...

  • Page 14: Evaporator Cover Parts

    Evaporator Cover (Fig . 31) 10 . Replace large (part #378PSM236) and small (part #378PSM235) o-ring as needed 11 . Replace evaporator cover (part #378PSM232) by turning it counter- clockwise on the evaporator pipe 12 . Reassemble by reversing removal steps NARVON...

  • Page 15: Electrovalve Assembly And Coil

    8mm socket 12 . Braze the copper lines to the unit lines and check for leaks 13 . Have the system re-charged per the specifications on the serial plate 14 . Reassemble by reversing the steps NARVON...

  • Page 16: Compressor

    • ~4 . 0 Ohms = Good • Infinite = bad, Replace Compressor • Zero = possible grounding, Check grounding by checking for resistance from Compressor wire pin to body of Compressor, if any resistance is shown, then replace Compressor NARVON...
  • Page 17 4 hex nuts and bolts with a 10mm wrench or socket Fig. 44 12 . Braze the copper lines to the unit lines and check for leaks 13 . Have the system re-charged per the specifications on the serial plate 14 . Reassemble by reversing the steps NARVON...

  • Page 18: Master Power Switch & Master Light Switch

    5 . Remove the wire connectors from the old switch, note their locations 6 . Install the wire connectors onto the new switch in the correct locations 7 . Reassemble by reversing the steps NARVON...

  • Page 19: Auger Switch & Drink Type Switch

    3 . Remove 4 socket head cap screws with a 3mm hex key from the rear panel and remove the panel (Fig . 39) 4 . Locate the in-line fuse holder in the middle wiring harness (Fig . 48) 5 . Open fuse holder by turning both sides counter-clockwise 6 . Reassemble by reversing removal steps NARVON...

  • Page 20: Compressor Electric Parts Kit

    (Fig . 54) 9 . Remove white wire from compressor connector by Fig. 54 pulling it straight off of compressor (Fig . 54) 10 . Installation is reverse of removal steps NARVON...

  • Page 21: Wire Diagram Single Bowl

    WIRE DIAGRAM SINGLE BOWL (#378SM261) MASTER POWER SWITCH MOTOR COMPRESSOR AUGER MOTOR SWITCH GEARBOX THERMOSTAT DRINK TYPE SWITCH MICRO COIL SWITCH SWITCH FUSE MASTER LIGHT SWITCH TRANSFORMER LED LID LIGHT NARVON...

  • Page 22: Wire Diagram Double Bowl

    POWER SWITCH MOTOR COMPRESSOR AUGER MOTOR SWITCH GEARBOX THERMOSTAT DRINK TYPE SWITCH MICRO COIL SWITCH SWITCH AUGER MOTOR SWITCH GEARBOX THERMOSTAT DRINK TYPE SWITCH MICRO COIL SWITCH SWITCH FUSE MASTER LIGHT SWITCH TRANSFORMER LED LID LIGHT LED LID LIGHT NARVON...

  • Page 23: Wire Diagram Triple Bowl

    MICRO COIL SWITCH SWITCH AUGER MOTOR SWITCH GEARBOX THERMOSTAT DRINK TYPE SWITCH MICRO COIL SWITCH SWITCH AUGER MOTOR SWITCH GEARBOX THERMOSTAT DRINK TYPE SWITCH MICRO COIL SWITCH SWITCH FUSE MASTER LIGHT SWITCH TRANSFORMER LED LID LIGHT LED LID LIGHT NARVON...

This manual is also suitable for:

378sm262378sm263

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