Wolf VU24S General Information Manual

This service manual assists with troubleshooting and diagnosing malfunctions, completion of repairs, and return of the product to proper operational condition. Read the complete instructions contained within before initiating any repairs. This guide is intended for use by Factory Certified Service. Wolf Appliance, Inc. recommends that repairs be performed by Factory Certified Service companies only. Warning and Caution product safety labels appear throughout this manual. Product safety labels appear at the beginning of some sections. Follow the instructions in the product safety labels to avoid personal injury and/or product damage. The sample safety labels explain the types of notices that appear in this manual. WARNING States a hazard that may cause serious injury or death if precautions are not followed. CAUTION Indicates minor injury or product damage may occur if precautions are not followed. IMPORTANT NOTE: Highlights especially important information. TIP: Indicates additional, useful information. Information and images contained herein are copyright of Wolf Appliance, Inc. Neither this manual nor any information or images contained herein may be copied or used in whole or in part without the express written consent of Wolf Appliance, Inc. © Wolf Appliance, Inc., all rights reserved. WOLF PRODUCT RATING PLATE INFORMATION On Under-Cabinet Hood Inserts, the rating plate is located behind the filter on the left side. Important information for each product is listed on the product rating plate. Rating plates identify: ▪ Model ▪ Serial number ▪ Electrical information, including current draw XXXX 1555XXXX 1555XXXX 1555XXXX MODEL DESCRIPTIONS AND SALES ACCESSORIES For more details on individual model descriptions and a listing of all compatible sales accessories, see the Wolf Distributor Price List. V SERIES VENTILATION MODEL KEY Model Character Description ICB International Designation V V Series Ventilation C Model Type Ceiling I Model Type Island U Model Type Under-Cabinet W Model Type Wall 24, 30, 36 or 48 Width (in inches) B Exterior: Black G Exterior: Glass S Exterior: Stainless Steel W Exterior: White Glass PRODUCT USE AND CARE AND INSTALLATION GUIDES Product Use and Care Guides, Installation Guides, and other product specifications are available in the Product Specifications and Manuals Library. Under-Cabinet Hood Insert General Information GENERAL INFORMATION service.subzero.com 828151 REVA 1

the date of installation. ▪ View product warranties at http://service.subzero.com/ ClaimsAndOrderProcessing/Pages/WarrantyInfo. ▪ Warranties start on the day of product installation. ▪ Search for warranty and service information by serial number, customer last name, and address using Unit History at http://service.subzero.com/Tools/UnitHistory. Under-Cabinet Hood Insert General Information service.subzero.com 828151 REVA 2

The Under-Cabinet Hood Insert controls are either buttons or a remote control. The buttons are located on the frame on the bottom of the hood. When pressed, the buttons push a switch on the power board. Under-Cabinet Button Function Icon Function Turns the blower on or off. Turns the blower on to low. Turns the blower on to medium. Turns the blower on to high or boost. Turns the lights on or off. Under-Cabinet Hood Insert Control Operation BLOWER: To adjust the blower speed, press , , or . To turn on boost, press for two seconds. Boost increases airflow by approximately 20% more than high. After 10 minutes, the blower automatically transitions to the previous selected speed. If boost is turned on with the blower off, it turns off after 10 minutes. DELAY: The delay automatically turns the lights and blower off after 15 minutes. To turn on the delay, press and hold for two seconds. TIP: Delay and boost cannot be turned on at the same time. LIGHTS: Press for high or press again for low. Press again to turn the lights off. UNDER-CABINET HOOD INSERT REMOTE CONTROL The remote control buttons are different than the buttons on the unit but perform the same functions. The remote control sensor is located on the power board next to the buttons. Under-Cabinet Remote Control Function Icon Function Turns the blower on to low. Turns the blower off. Increases the blower speed. Decreases the blower speed. Turns the blower on to boost. Turns the delay on. Turns the lights on or off. Under-Cabinet Hood Insert Remote Control Operation BLOWER: To adjust the blower speed, press , , or . To turn on boost, press . Boost increases airflow by approximately 20% more than high. After 10 minutes, the blower automatically transitions to the previous selected speed. If boost is turned on with the blower off, it turns off after 10 minutes. DELAY: The delay automatically turns the lights and blower off after 15 minutes of use. To turn on the delay, press . TIP: Delay and boost cannot be turned on at the same time. LIGHTS: Press for high or press and hold for two seconds for low. Press again to turn the lights off. Under-Cabinet Hood Insert Controls and Operation CONTROLS AND OPERATION service.subzero.com 828151 REVA 3

This section explains how to access and remove components from a Wolf Under-Cabinet Hood Insert. WARNING To avoid electric shock, disconnect power to the hood whenever servicing, accessing, or removing components powered by electricity or components near other electrical components. If removing a hood from its installation, remember that the units are heavy and must be lowered from the installation, and may require two persons. Removing a unit from its installation should be performed only by an authorized service technician or installer. CAUTION When working on the hood or its components, be careful when handling sheet metal parts. The edges may be sharp. FILTER REMOVAL Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. FILTER INSTALLATION Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. INNER PANEL MAGNET REMOVAL Remove the Inner Panel Magnet 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Turn the inner panel magnet counterclockwise to remove it. INNER PANEL MAGNET INSTALLATION Install the Inner Panel Magnet 1 Turn the inner panel magnet clockwise to install it. 2 Lift the front of the inner panel assembly until it contacts the panel magnets. Under-Cabinet Hood Insert Component Access and Removal service.subzero.com 828151 REVA 4

WARNING Disconnect power to the unit before initiating this repair. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. LED LIGHT INSTALLATION Install the LED Light Assembly 1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. INNER PANEL ASSEMBLY REMOVAL Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. 3 Push the tabs on the hinge pins toward the center of the unit, disengaging the hinge pins from the hinges. INNER PANEL ASSEMBLY INSTALLATION Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. OUTER PANEL REMOVAL WARNING Turn off the power to the product before starting this procedure. To remove the outer panel, first remove the filters, LED assemblies, and the inner panel. Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 5

Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. 3 Push the tabs on the hinge pins toward the center of the unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. 2 Access the cabinet where the hood is located, and use a Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. 4 Disconnect the wire connectors from the control board. OUTER PANEL INSTALLATION Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. Under-Cabinet Hood Insert REMOVE THE FILTER (continued) service.subzero.com 828151 REVA 6

panel. Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Install the LED Light Assembly 1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. POWER BOARD AND BUTTON ASSEMBLY REMOVAL WARNING Turn off the power to the product before starting this procedure. To remove the power board and button assembly, first remove the filters, LED assemblies, inner panel, and outer panel. Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. Under-Cabinet Hood Insert INSTALL THE OUTER PANEL (continued) service.subzero.com 828151 REVA 7

unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. 2 Access the cabinet where the hood is located, and use a Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. 4 Disconnect the wire connectors from the control board. Remove the Power Board and Button Assembly 1 Place the outer panel face-down on a protected surface. 2 Press the tab on the left side of the power board and button assembly. 3 Lift the tab side of the power board and button assembly from the outer panel. 4 Remove the power board and button assembly from the unit. POWER BOARD AND BUTTONS ASSEMBLY INSTALLATION Install the Power Board and Button Assembly 1 Install the right side of the power board and button assembly into the board support. 2 Align the buttons to pass through the button holes on the outer panel. 3 Push the left side of the power board and button assembly into the board support. Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. 3 Use a Phillips screwdriver to install the screws into the outer panel. Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Under-Cabinet Hood Insert REMOVE THE INNER PANEL ASSEMBLY (continued) service.subzero.com 828151 REVA 8

1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. POWER BOARD OR BUTTONS REMOVAL WARNING Turn off the power to the product before starting this procedure. To remove the power board or buttons, first remove the filters, LED assemblies, inner panel, outer panel, and power board and button assembly. Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. 3 Push the tabs on the hinge pins toward the center of the unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 9

Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. 4 Disconnect the wire connectors from the control board. Remove the Power Board and Button Assembly 1 Place the outer panel face-down on a protected surface. 2 Press the tab on the left side of the power board and button assembly. 3 Lift the tab side of the power board and button assembly from the outer panel. 4 Remove the power board and button assembly from the unit. Remove the Power Board or Buttons 1 On the side of the power board and button assembly opposite of the buttons, push the tabs and open the power board and button assembly case. 2 Remove the power board from the pins in the power board and button assembly case. 3 Remove the buttons from the front of the power board and button case. POWER BOARD OR BUTTONS INSTALLATION Install the Power Board or Buttons 1 Insert the power board into the power board and button assembly case. 2 Push together the two halves of the power board and button assembly case. 3 Install the buttons on the power board and button assembly case. Install the Power Board and Button Assembly 1 Install the right side of the power board and button assembly into the board support. 2 Align the buttons to pass through the button holes on the outer panel. 3 Push the left side of the power board and button assembly into the board support. Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. 3 Use a Phillips screwdriver to install the screws into the outer panel. Under-Cabinet Hood Insert REMOVE THE OUTER PANEL (continued) service.subzero.com 828151 REVA 10

1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Install the LED Light Assembly 1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. INTERNAL BLOWER REMOVAL WARNING Turn off the power to the product before starting this procedure. To remove the internal blower, first remove the filter, LED assemblies, inner panel, and outer panel. Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 11

unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. 2 Access the cabinet where the hood is located, and use a Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. 4 Disconnect the wire connectors from the control board. Remove the Internal Blower 1 Disconnect the internal blower wire harness from the internal blower. 2 Use a Phillips screwdriver to remove the internal blower mounting screws. 3 Remove the internal blower from the unit. INTERNAL BLOWER INSTALLATION Install the Internal Blower 1 Connect the internal blower wire harness to the internal blower. 2 Raise the internal blower into the hood. 3 Use a Phillips screwdriver to install the internal blower mounting screws. Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. 3 Use a Phillips screwdriver to install the screws into the outer panel. Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Install the LED Light Assembly 1 Connect the LED light assembly wire connector. Under-Cabinet Hood Insert REMOVE THE INNER PANEL ASSEMBLY (continued) service.subzero.com 828151 REVA 12

Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. TRANSFORMER REMOVAL WARNING Turn off the power to the product before starting this procedure. It is possible to remove the transformer without uninstalling the unit, but it is very difficult. To remove the transformer, it is recommended to first remove the filters, LED assemblies, inner panel, and outer panel. Then, uninstall the unit. Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. 3 Push the tabs on the hinge pins toward the center of the unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. 2 Access the cabinet where the hood is located, and use a Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. Under-Cabinet Hood Insert INSTALL THE LED LIGHT ASSEMBLY (continued) service.subzero.com 828151 REVA 13

Uninstall the Unit 1 Turn off the power to the unit. 2 Remove the unit from the installation. Remove the Transformer 1 Use a Phillips screwdriver to remove the screw from the front of the transformer. 2 Pull the transformer out of the transformer bracket far enough to access the transformer covers. 3 Use a Phillips screwdriver to remove the transformer cover screws. 4 Use a small flat-blade screwdriver to loosen the wire hold- down screws, and remove the wires from the transformer. 5 Remove the transformer from the unit. TRANSFORMER INSTALLATION Install the Transformer 1 Insert the wires into the transformer and use a small flat- blade screwdriver to tighten the wire hold-down screws. 2 Install the transformer covers onto the transformer. 3 Use a Phillips screwdriver to install the transformer cover screws. 4 Place the transformer onto the transformer bracket. 5 Use a Phillips screwdriver to install the screw through the transformer notch into the transformer bracket. Install the Unit Install the unit. Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. 3 Use a Phillips screwdriver to install the screws into the outer panel. Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Install the LED Light Assembly 1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. Install the Filter 1 Set the filter in the filter opening, back of the filter first. Under-Cabinet Hood Insert REMOVE THE OUTER PANEL (continued) service.subzero.com 828151 REVA 14

back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. DAMPER REMOVAL WARNING Turn off the power to the product before starting this procedure. To remove the damper first remove the filters, LED assemblies, inner panel, and outer panel. Then, uninstall the unit. Remove the Filter 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. 3 Push the tabs on the hinge pins toward the center of the unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. 2 Access the cabinet where the hood is located, and use a Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. Under-Cabinet Hood Insert INSTALL THE FILTER (continued) service.subzero.com 828151 REVA 15

Uninstall the Unit 1 Turn off the power to the unit. 2 Remove the unit from the installation. Remove the Damper 1 Remove the duct sealing tape around the damper. 2 Pull the damper from the round discharge. DAMPER INSTALLATION Install the Damper 1 Place the damper on the blower discharge. 2 Secure the damper with duct sealing tape. Install the Unit Install the unit. Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. 3 Use a Phillips screwdriver to install the screws into the outer panel. Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Install the LED Light Assembly 1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. POWER CORD REMOVAL WARNING Turn off the power to the product before starting this procedure. To remove the power cord, first remove the filters, LED assemblies, inner panel, and outer panel. Then, uninstall the unit. Under-Cabinet Hood Insert REMOVE THE OUTER PANEL (continued) service.subzero.com 828151 REVA 16

1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Push the plastic tab on the front end of the filter toward the rear of the hood, and pull down. 3 Pull the filter forward, and remove it from the unit. Remove the LED Light Assembly 1 Place masking tape around the LED light assembly to protect the stainless steel from scratching. 2 Use a flat-head screwdriver to pull the LED light assembly away from the stainless steel panel. 3 Pull the LED light assembly wire harness far enough through the hole to access the connector. 4 Disconnect the LED light assembly wire harness. 5 Remove the LED light assembly from the unit. Remove the Inner Panel Assembly 1 Pull the front of the inner panel assembly downward, disengaging it from the inner panel magnets. 2 Use a Phillips screwdriver to remove the screw in each hinge pin. 3 Push the tabs on the hinge pins toward the center of the unit, disengaging the hinge pins from the hinges. Remove the Outer Panel 1 Use a Phillips screwdriver to remove the screws from the outer panel. 2 Access the cabinet where the hood is located, and use a Phillips screwdriver to remove the screws from the front of the hood. 3 Lower the outer panel from the unit. 4 Disconnect the wire connectors from the control board. Uninstall the Unit 1 Turn off the power to the unit. 2 Remove the unit from the installation. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 17

1 Unplug the power cord from the wire box. 2 Use a Phillips screwdriver to remove the cover from the top of the hood. 3 Pull the power cord and plug cover from the unit. 4 Use a Phillips screwdriver to remove the screws from the plug cover clamp. 5 Remove the power cord from the plug cover unit. POWER CORD INSTALLATION Install the Power Cord 1 Install the power cord into the unit. 2 Plug the power cord into the wire box. 3 Use a Phillips screwdriver to install the plug cover onto the hood. 4 Use a Phillips screwdriver to install the plug cover clamp onto the plug cover. Install the Unit Install the unit. Install the Outer Panel TIP: The six-pin connector for the blower and power connection goes on the tab side (left) of the power board and button assembly. 1 Connect the wire connectors to the power board and button assembly. 2 Place the outer panel onto the unit. 3 Use a Phillips screwdriver to install the screws into the outer panel. Install the Inner Panel Assembly 1 Slide the tabs of the hinge pins toward the hinge, pushing the hinge pin into the hinge. 2 Use a Phillips screwdriver to install the hinge pin screws. 3 Lift the front of the inner panel assembly until it contacts the panel magnets. Install the LED Light Assembly 1 Connect the LED light assembly wire connector. 2 Push the LED light assembly into the outer panel. Install the Filter 1 Set the filter in the filter opening, back of the filter first. 2 Push the plastic tab on the front end of the filter toward the back of the filter. 3 Rotate the filter upward into place, and release the plastic tab. 4 Lift the front of the inner panel assembly until it contacts the panel magnets. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 18

This section explains how to troubleshoot various components in a Wolf Under-Cabinet Hood Insert. WARNING To avoid electric shock, disconnect power to the hood when preparing for tests. Care should be used while performing any test with the hood energized. WARNING If it is necessary to remove a hood from the installation, remember that the units are heavy and must be lowered from the installation. Under-Cabinet Hood Insert Troubleshooting Guide Under-Cabinet Hood Insert service.subzero.com 828151 REVA 19

Symptom Possible Cause or Diagnostic Test Resolution Remote control does not work. Check the batteries. If necessary, replace with two new AAA batteries. Perform remote pairing. 1 2 Press and hold for five seconds. Control panel does not work. TIP: The sensor for the remote control is connected to the power board and may not work. Test the remote control operation. If the remote control works, there is a fault in the hood. If only one button does not work, test the operation of the hood buttons. Replace the power board. Check the operation of the hood lights. If the lights work, there is power to the electronic transformer. If the hood lights do not work, see "Hood lights do not work." Check voltage to the button wire harness. 1 Disconnect the button wire harness from the secondary side of the electronic transformer. 2 Check for 12 VDC between the pins of the transformer. 3 If there is no voltage, replace the electronic transformer. Check the voltage at the CN2 connector. 1 Check for 12 VDC between pin 5 and pin 6 of the CN2 connector. 2 If there is 12 VDC, replace the power board. 3 If there is not 12 VDC, inspect the wiring from the electronic transformer to the CN2 connector. 4 Repair or replace the wiring. Hood lights and blower do not turn on. The breaker is open. Reset the breaker. GFCI circuit is tripped. The unit should not be installed on a GFCI circuit. Change the outlet type. Verify the house circuit is dedicated, the correct voltage, and sized correctly. If necessary, contact an electrician to bring the circuit into specification. Check voltage at the three-pin connector at the wiring box: ▪ L1 is pin 3. N is pin 1. Ground is pin 2. ▪ L1 to ground = 110 VAC to 127 VAC. ▪ N to ground = 0 VAC ▪ L1 to N = 110 VAC to 127 VAC. Confirm that the L1, N, and ground are correctly connected. Ensure the connections are tight. Check voltage at the power board connector: Pin 3 to pin 6 = 110 VAC to 127 VAC. Replace or repair the connector from the electrical box to the power board. Blower motor runs only at high speed. Power board fault. Replace the power board. Hood lights do not work. Test the operation of the LED assemblies. If only one LED assembly is out, replace the LED light assembly. Test the operation of the remote control and buttons. Try all button operations on the control panel and on the remote. ▪ The icon for the lights on the control panel is . ▪ The icon for the lights on the remote control is . ▪ If the lights operate only from the control panel or the remote control, replace the failed part. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 20

Resolution Disconnect the connector CN2 from the power board and check for 110 VAC to 127 VAC from pin 1 to pin 2 on the power board. If no voltage, replace the power board. Disconnect the two-pin connector from the primary side of the electronic transformer and check for 110 VAC to 127 VAC between the pins. Repair or replace the harness from the power board to the electronic transformer. Disconnect the two-pin connector from the secondary side of the electronic transformer, and check for 12 VDC on the electronic transformer. If no voltage, replace the transformer. Disconnect the two-pin connectors from all of the LED assemblies and check for 12 VDC. Repair or replace the harness from the electronic transformer to the LED assemblies. Blower motor does not run at any speed. IMPORTANT NOTE: Voltages must be taken under a load. Back pin connectors to check for voltage. On the blower side of the six-pin connector, check for 110 VAC to 127 VAC between pin 3 and pin 6. If no voltage from pin 3 to pin 6, check the wiring harness and power to the unit. Replace the blower harness if there is power to the unit. On the blower side of the six-pin connector, check for 110 VAC to 127 VAC between pin 4 and pin 6. If no voltage from pin 4 to pin 6, check the connector. If the connector is good, replace the power board. On the power board side of the nine-pin connector, check for 110 VAC to 127 VAC between pin 4 and pin 5. If no voltage from pin 4 to pin 5, replace the blower harness. On the blower side of the nine-pin connector, check for 110 VAC to 127 VAC between pin 4 and pin 5. If no voltage from pin 4 to pin 5, check the connector. If the connector is good, replace the blower. Check the blower. Replace the blower. Diagnostic tests show a problem with the internal blower motor. On the motor side of the connector, ohm: ▪ Pin 4 to pin 5 ▪ Pin 4 to motor case ▪ Pin 5 to motor case If reading open between pin 4 to pin 5 or continuity between pin 4 or pin 5 to motor case, verify it is not the blower motor harness, then replace the blower motor. Blower motor runs, but not at all four speeds. This failure can be caused by a triac failure on the power board or by a touch control failure. 1 Try all button operations on the control panel and remote control. 2 If the blower speeds change correctly on either the remote control or control panel, but not on the other, replace the failed part. 3 If the response on the control board and the remote control are the same, replace the power board. Hood does not move enough air. Verify the duct run is the correct size, including: ▪ Wall/roof cap is correct. ▪ No reduction in size at any point. ▪ Damper is installed correctly. ▪ No excessive elbows. ▪ No excessive length. ▪ No air box used. Correct the duct issue. Recommended duct size is 6". Blower motor is not changing speeds. ▪ For internal blowers, remove the ducting above. IMPORTANT NOTE: Restrictions in the ducting can prevent an audible speed change. If no speed change is noticed, see “Blower motor runs, but not at all four speeds.” If there is a speed change, review the ducting again for restrictions. Filters are dirty. Remove the filters to test. Clean the filters. Insufficient make-up air. Open an outside door or window to test. Under-Cabinet Hood Insert service.subzero.com 828151 REVA 21

1 Unplug the power cord from the wiring box. 2 Measure the voltage from electrical supply L1 (typically black) to ground. The voltage should be 110 VAC to 127 VAC. 3 Measure the voltage from electrical supply neutral (typically white) to ground. The voltage should be 0 VAC. 4 Measure the voltage from electrical supply L1 to neutral. The voltage should be 110 VAC to 127 VAC. 5 If the voltages from the power cord are not correct, test the home outlet. 6 Plug in the power cord. 7 Disconnect the three-pin connector from the wiring box. 8 Measure the voltage from pin 2 to pin 3. The voltage should be 110 VAC to 127 VAC. 9 Measure the voltage from pin 1 to pin 2. The voltage should be 0 VAC. 10 Measure the voltage from pin 1 to pin 3. The voltage should be 110 VAC to 127 VAC. 11 If the voltages at the wiring box three-pin connector is not correct, replace the electric filter. TEST THE LINE VOLTAGE TO THE POWER BOARD 1 At the wiring box three-pin connector, measure the voltage, back pinning pin 2 and pin 3. The voltage should be 110 VAC to 127 VAC. 2 Measure the voltage, back pinning pin 1 to pin 2. The voltage should be 0 VAC. 3 Measure the voltage, back pinning pin 1 to pin 3. The voltage should be 110 VAC to 127 VAC. 4 On the six-pin connector at the power board, measure the voltage, back pinning pin 3 to pin 6. The voltage should be 110 VAC to 127 VAC. 5 Measure the voltage, back pinning pin 3 to the unit cabinet. The voltage should be 110 VAC to 127 VAC. 6 Measure the voltage, back pinning pin 6 to the unit cabinet. The voltage should be 0 VAC. 7 If the voltage at the power board six-pin connector is not correct, replace the wire harness. TEST THE LINE VOLTAGE TO THE TRANSFORMER 1 Measure the voltage at the six-pin connector on the control board by back pinning pin 1 and pin 2. The voltage should be 110-127 VAC. 2 If the voltage is not correct, inspect the connector. Otherwise replace the power board. 3 Measure the voltage at the two-pin connector at the electronic transformer by back pinning pin 1 and pin 2. The voltage should be 110-127 VAC. 4 If the voltage at the electronic transformer is not correct, replace the electronic transformer wire harness. TEST 12 VDC FROM THE ELECTRONIC TRANSFORMER 1 Back pin the LED harness two-pin connector on the secondary side of the electronic transformer and measure the voltage. The voltage should be 12 VDC. Under-Cabinet Hood Insert Test Procedures TEST PROCEDURES service.subzero.com 828151 REVA 22

the electronic transformer, and measure the voltage. The voltage should be 12 VDC. 3 If the voltage is not 12 VDC, inspect the connector. 4 If the voltage is not 12 VDC, the electronic transformer input is correct, and the connector is good, replace the electronic transformer. 5 If the voltage is correct on the electronic transformer side of the wire harness, test the other side of the LED harness. 6 Back pin the CN2 connector to pin 5 and pin 6. The voltage should be 12 VDC. 7 If the voltage is not 12 VDC, inspect the connector. 8 If the voltage is not 12 VDC, the electronic transformer output is correct, and the connector is good, replace the wire harness. TEST 12 VDC AT THE LED ASSEMBLY HARNESS 1 Back pin the LED assembly side of the two-pin connector and test for 12 VDC. 2 If the voltage is not 12 VDC, back pin the electronic transformer side of the two-pin connector, and test for 12 VDC. 3 If there is 12 VDC on the electronic transformer side of the two-pin connector and not on the LED assembly side of the two-pin connector, inspect the connector. If the connector is good, replace the LED assembly. 4 If there is not 12 VDC on the electronic transformer side of the two-pin connector and voltage has been traced from the electronic transformer, inspect the connector. 5 Disconnect the LED assembly wire harness from the electronic transformer and all of the LED assemblies. Check the continuity of the LED assembly wire harness pin to pin. 6 If the LED assembly wire harness cannot be repaired, replace the LED assembly wire harness. TEST THE VOLTAGE OF THE BLOWER HARNESS 1 Measure the voltage of the CN1 connector by back pinning pin 4 and pin 6. The voltage should be 110 VAC to 127 VAC. 2 If the voltage is not correct, inspect the connector. 3 If the connector is good, measure the voltage of the CN1 connector by back pinning pin 3 and pin 6. The voltage should be 110 VAC to 127 VAC. 4 If the connector is good and the voltage between pin 3 and pin 6 is good, replace the power board. 5 Measure the voltage on the power board side of the nine- pin connector by back pinning pin 4 and pin 6. The voltage should be 110 VAC to 127 VAC. 6 If the voltage is not correct, inspect the connector. 7 If the connector and the voltage at CN1 are good, repair or replace the blower harness. 8 Measure the voltage on the blower side of the nine-pin connector by back pinning pin 4 and pin 5. The voltage should be 110 VAC to 127 VAC. 9 If the voltage is not correct, inspect the connector. 10 If the connector is good, go to Test the Internal Blower. Under-Cabinet Hood Insert Test Procedures TEST 12 VDC FROM THE ELECTRONIC TRANSFORMER (continued) service.subzero.com 828151 REVA 23

Perform these tests only after confirming the voltage is correct up to the nine-pin connector on the power board side of the blower connection. 1 Disconnect the nine-pin connector. 2 Measure the resistance from pin 4 to pin 5 on the blower connector. 3 Measure the resistance from pin 4 to the blower casing. 4 Measure the resistance from pin 5 to the blower casing. 5 If the reading is open from pin 4 to pin 5 or there is continuity from pin 4 or pin 5 to the blower case, replace the blower. Under-Cabinet Hood Insert Test Procedures service.subzero.com 828151 REVA 24

VU24S AND VU30S TECHNICAL DATA Parameter Value AC power 115 VAC, 2 W LED, part number 825540 ▪ 12 VDC ▪ Replaced as an assembly Transformer, part number 825535 110 VAC to 127 VAC input and 12 VDC output Electric filter, part number 828272 110 VAC to 127 VAC Under-Cabinet Hood Insert Technical Data TECHNICAL DATA service.subzero.com 828151 REVA 25

connector at the power board and the nine-pin blower connector. Wires from the six-pin connector go to the nine-pin connector of the blower harness. The blower harness connects to the internal blower harness. The blower speed is controlled by a triac on the power board. 110 VAC to 127 VAC enters the electronic transformer through the wire harness. The electronic transformer supplies 12 VDC to the LEDs through the LED wire harness. A three-pin harness on the electronic transformer's secondary side sends 12 VDC back to the six-pin connector CN2. The 12 VDC is then sent through the power board to the control buttons. Under-Cabinet Hood Insert Wiring Diagrams WIRING DIAGRAMS service.subzero.com 828151 REVA 26

Under-Cabinet Hood Insert Wiring Diagrams service.subzero.com 828151 REVA 27