Subzero WOLF WWD30 Service Manual Download

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Page 39

Warming Drawer WWD30-2

Troubleshooting Guides

5-6

#814750 - Revision A - January, 2011

PROBLEM

POSSIBLE CAUSE

TEST / ACTION

F. Food Dries Out

G. One or More LCD does not

Illuminate

H. LCD display is black

I. One or More LCD Illuminated

Constantly

J. Drawer Does Not Slide

Smoothly

K. Drawer Does Not “Pull In”

Temperature Setting too High

Food Uncovered

Food in Drawer too Long

No Power to Unit

Unit Switched OFF

(

NOTE

See Automatic Shut-off

Information in Section 3.)

Door Switch Faulty

Electronic Control System Fault

Disconnected or Broken Wiring

Contrast set to low

Contrast is set to high

LCD exposed to direct sunlight

Electronic Control System Fault

Drawer Overloaded (Exceeding 80 lbs.
limit) or Unbalanced Load

Drawer Glides Misaligned

Drawer Frame Skewed

Drawer Glides Defective

Self-Close Feature Broken

Slide Mounting Screw is Loose

Something Fell Behind Drawer

Reduce temperature setting.

Cover food with lid or aluminum foil.

Food in drawer longer then 4 hrs. will tend to dry
out. Instruct Customer. (Timer default is 4 hrs.)

Check power to unit. Plug unit in, switch supply
circuit breaker to ON position or replace fuse if
defective.

Switch unit ON and set to desired temperature.

Use ohm meter to verify switch operation.
Replace switch if faulty.

See Electronic Control System Test Procedures
following General Troubleshooting Guide.

Check all electrical connections and wires.
Reconnect or repair wiring.

Adjust contrast level

Adjust contrast Level

Allow to cool. Block from direct sunlight.
Instruct Customer.

See Electronic Control System Test Procedures
following General Troubleshooting Guide.

Reduce and/or redistribute drawer contents.

Open drawer fully and close, then reopen and
check operation. If problem persists, see Drawer
Frame Skewed and Drawer Glides Defective,
below.

Remove drawer tub and inspect frame. If
skewed, straighten.

Remove drawer tub and inspect glide operation.
Replace if defective.

Replace Slide. (

Wolf Recommends to replace

ALL slides at same time)

Tighten or Replace Screw

Remove Obstruction

Summary of Contents for WOLF WWD30

Page 1: ...General Information 2 Installation Information 5 Controls Operation 12 Component Access Removal 24 Troubleshooting Guide 34 Wiring Diagrams 40 subzero com 800 222 7820 WWD30 Service Manual ...

Page 2: ... safety should be taken INTRODUCTION This Wolf Warming Drawer Technical Service Manual has been compiled to provide the most recent technical serv ice information about the Wolf Warming Drawer including parts list and exploded views This information will enable service technician s to troubleshoot and diagnose malfunctions perform necessary repairs and return a Wolf Warming Drawer to proper operat...

Page 3: ... Section 6 Technical Data 6 1 Temperature Information 6 2 Heating Element Information 6 2 Thermal Cut Out Information 6 2 Thermistor Testing Information 6 2 Power Board Identification 6 2 Section 7 Wiring Diagram 7 1 Wiring Diagram Domestic 7 2 TABLE OF CONTENTS Page Section 1 General Information 1 1 Introduction 1 2 Important Safety Information 1 2 Technical Assistance 1 2 Table of Contents 1 3 W...

Page 4: ...ill body or hood that rusts through due to defective materi al or workmanship Labor to remove and replace defective parts is not covered NON RESIDENTIAL Warranty Summary Two year TOTAL PRODUCT warranty parts and labor NOTE This warranty only applies to products installed in test kitchens culinary and school kitchens and other installations which help promote Wolf Appliance products Restaurant inst...

Page 5: ...ng food Removable Stainless Steel Drawer Stainless Steel Drawer Front Classic Carbon and Platinum Finishes Available Hidden Touch Control Panel See Figure 1 3 Stainless Steel Interior Galvanized Metal Exterior LCD Display Power On Off Temperature Control Presets Timer Can be used as Kitchen Timer Outdoor Model WWD30O is specifically designed and safe for outdoor applications and can also be instal...

Page 6: ...0 ampere fused electrical supply Separate electrical circuit serving only this appliance A properly grounded 3 prong receptacle Outdoor applications require that the unit be connected to a properly grounded GFCI circuit Line Voltage Power Neutral Ground TO AVOID SHOCK HAZARD THE INSTALLATION SITE MUST BE EQUIPPED WITH A PROPERLY GROUNDED 3 SLOT RECEPTACLE TO MATCH THE 3 PRONG GROUNDED POWER SUPPLY...

Page 7: ...in the cabinet wall Push the drawer back into the opening until the front flange is flush with the cabinet front Make sure the power cord does not get trapped under the warming drawer Open the warming drawer to its full extension Then drill pilot holes in each corner of the warming drawer through holes in the side frame and install the wood screws provided with the unit See Figure 2 2 Figure 2 2 D...

Page 8: ...e the toe kick to allow for the overlap of the warm ing drawer trim NOTE Additional clearance between warming drawer and oven openings may be required Check that oven supports do not obstruct the interior dimensions required for the warming drawer When the warming drawer is installed below a built in oven a minimum of 2 3 8 60 between warming drawer and oven openings is required for clear ance of ...

Page 9: ...led on site to ensure proper fit and gaps are achieved A drilling template is provide with the integrated drawer front NOTE Be sure to finish the inside lip of the opening and the front face of the platform and cleats These areas may be visible when the drawer is open NOTE Be aware of the location of the mounting holes on the warming drawer frame to make sure screws used to attach the cleats do no...

Page 10: ...l cabinet depth Dashed line represents profile of unit FRONT VIEW SIDE VIEW TOP VIEW 105 8 270 FLUSH INSET HEIGHT 91 8 232 OPENING HEIGHT E 1 25 PLATFORM 285 8 727 WARMING DRAWER OPENING WIDTH 17 432 OPENING HEIGHT 181 2 470 FLUSH INSET HEIGHT 271 2 699 STANDARD MICROWAVE OPENING WIDTH E 281 2 724 E SERIES OVEN OPENING WIDTH 11 16 17 TOP CLEAT 9 16 14 PLATFORM 1 25 SIDE CLEATS E E 5 127 4 102 273 ...

Page 11: ...cabinet depth Dashed line represents profile of unit FRONT VIEW SIDE VIEW TOP VIEW 105 8 270 FLUSH INSET HEIGHT 91 8 232 OPENING HEIGHT E 1 25 PLATFORM 285 8 727 WARMING DRAWER OPENING WIDTH 187 8 479 OPENING HEIGHT 201 8 511 FLUSH INSET HEIGHT 271 2 699 CONVECTION MICROWAVE OPENING WIDTH E 281 2 724 E SERIES OVEN OPENING WIDTH 1 2 13 TOP CLEAT 9 16 14 PLATFORM 1 25 SIDE CLEATS E E 5 127 4 102 273...

Page 12: ...TFORM SIDE CLEATS 243 4 629 min FLUSH INSET DEPTH 11 4 32 FOR MICROWAVE 1 25 FOR OVEN AND WARMING DRAWER Platform must support 250 lbs 113 kg NOTE Location of electrical supply within oven opening may require additional cabinet depth Dashed line represents profile of unit FRONT VIEW SIDE VIEW TOP VIEW 143 4 375 OPENING HEIGHT 153 8 391 FLUSH INSET HEIGHT 1 25 SIDE CLEATS 105 8 270 FLUSH INSET HEIG...

Page 13: ...ontrol will open the element relay Once the control sees a thermistor temperature of 5ºF below set point the relay will close allowing element to cycle on Power Relay Board Circulation Fan Element Display Board Keypad Flex Cable Inner ceiling Network Cable Electronic Control Board Behind Front Panel Door Switch Bottom of Drawer Front Display Beeper CONTROL all low temp components Keypad Communicat...

Page 14: ... will be remain off The PROOF is on anytime PROOF mode is being used The ON indicator is on anytime control is calling for heat The exception is during Sabbath mode where the ON indicator stays on constantly NOTE TIMER is on anytime there is a timed warming event or if kitchen timer is being used NOTE TIMER is not an option in Sabbath mode POWER Key The POWER key is used to turn unit on and off Wh...

Page 15: ...nit will switch off NORMAL WARMING MODE Normal warming mode is the basic operating mode when power is turned on and any warming function is selected This will include heating by the element and circulation of air by use of the fan Mode Entry The unit can be placed into a normal warming mode by simply pressing the Power On Off key followed by either TEMP up or down arrow keys or any preset is press...

Page 16: ...lash when first entering mode Once mode is active the TIMER will no longer be illuminated If no time is set timer will automatically default to 4 00 hours This ensures a definitive stop time Operations When HIGH Preset key is depressed control will display 200F in temperature display For MED temperature display will read 160F and for LOW temperature display will read 120F In timer area of display ...

Page 17: ...nt and fan maintains drawer temperature to set point temperature Fan is on while element is on during warming mode as long as drawer switch returns a drawer closed value If element has cycled off fan will continue to circulate air inside drawer for a pre determined time before turning off Fan will then re energize when element is turned back on during a call for heat PREHEAT Preheat can be describ...

Page 18: ...first 5 second increment is obtained then will increase by 5 seconds per 1 2 second If TIMER up or down arrow key is depressed for longer than 30 seconds display will increase by 30 minute increments each 1 2 second until 5 00 Hours is reached then increase in one hour increments up to 24 00 hours NOTE Timer will count up in time with 1 minute as the minimum setting and going up to 24 00 hours min...

Page 19: ... drawer is open for longer than 1 minute and the unit calls for heat element will randomly turn on and off If in Sabbath mode but a second key press does not occur withing 10 seconds the unit will enter OFF mode Mode Exit A press of the Power On Off key will terminate Sabbath mode and shut off unit at any time TIMER PROOF LOW PRESETS HIGH MED TEMP POWER ON OFF PROOF F TEMP TEMP TEMP ON TIMER Figur...

Page 20: ...es must be made when unit is in OFF mode See Figure 3 20 for a quick reference to keystrokes to enter modes and features Temperature Display Preference Control can be switched between Fahrenheit or Celsius by pressing and holding both TEMP up and down arrow key for 5 seconds Use the TEMP Up or Down arrow key to change from F to C or C to F See Figure 3 12 NOTE Press Power On Off key to exit and sa...

Page 21: ...sed on drawer state at full illumination NOTE Left side of display will show On continuously and the right side of display will flash between bclt and Sab Continuous mode Off refers to backlight continuously off only in Sabbath mode Outside of Sabbath mode back light works as normal based on drawer state at full illumination NOTE Left side of display will show Off continuously and the right side o...

Page 22: ...l control information parameters such as total hours used See Figure 3 17 3 19 NOTES Using the opposite TIMER up or down arrow key will reverse your previous order To clear error codes logged press and hold TIMER up and down arrow keys for 5 seconds while in Field Service Mode See Troubleshooting Section 5 for list of error codes and meanings NOTE Once you have made it through all errors and infor...

Page 23: ...es of continuous call for heat Occurs only during preheat mode and the door is closed Door switch closed when the keypad is being operated or unit turned on Drawer temperature rises to 250ºF in any mode state Cable wires that activate element or fan relays on power board are not making connection Replace Control Board In FSM Field Service Mode view temper ature as view by thermistor Verify wiring ...

Page 24: ... Display Contrast Change Mode LED Back Lighting Change Mode TEMP ELE Func ON Relay closed Element on TEMP ELE Func OFF Relay Opens Element Off TEMP Fan Func ON Relay closed Fan turns on TEMP Fan Func OFF Relay Opens Fan turns Off TEMP Dor CLOS if Drawer Closed OPEn If Drawer Open key press TEMP DISPLAY TIMER DISPLAY ON INDICATOR POWER ON OFF PROOF MED POWER ON OFF 5 Seconds 5 Seconds POWER ON OFF ...

Page 25: ...ULD FALL RESULTING IN SERIOUS INJURY PULLING A UNIT FROM ITS INSTALLATION SHOULD ONLY BE PERFORMED BY A TRAINED AUTHORIZED SERVICE TECHNICIAN OR INSTALLER TO AVOID ELECTRIC SHOCK POWER TO A WARMING DRAWER UNIT MUST BE DISCONNECTED WHENEVER ACCESSING AND OR REMOVING COMPONENTS POWERED BY ELECTRICITY OR COMPONENTS NEAR OTHER ELECTRICAL COMPONENTS Metal edges may be sharp Use caution when servicing u...

Page 26: ...ontrol cable in draw er 5 The drawer can be separated from slide assemblies by moving drawer release up for the left side and down for the right and pull for the bottom See Figures 4 2 4 3 NOTE It is usually better to leave the two sections of the slides engaged until all three slides are released from their latch mechanisms This way they can help support the drawer until all three can be separate...

Page 27: ...ings and Cautions at beginning of Section 1 Stainless steel drawer box must be removed from drawer 2 Open drawer to the full open position 3 Extract screws along the bottom inside edge of front panel See Figure 4 7 4 Extract screws along the top flange of front panel 5 Lift front drawer panel off the drawer mounting panel 6 Handle mounting screws are accessible from the inside face of the front pa...

Page 28: ...rnings and Cautions at beginning of Section 1 Disconnect Electrical Supply to Unit 2 Stainless steel drawer box must be removed from drawer 3 To remove the control panel front drawer panel and door mounting panel will need to be removed Page 4 4 4 Disconnect all electrical leads from control panel 5 Extract the control panel mounting screws from bracket See Figure 4 12 Lift control panel from draw...

Page 29: ... and control cable through hole on right back face of drawer far enough to remove cable grommet See Figure 4 14 NOTE To get enough slack in cable to remove grom met you may need to slide cable from under clamp in back of drawer 5 From inside of drawer frame assembly disconnect control cable from control board See Figure 4 11b Carefully pull control cable out of drawer assembly 6 Remove drawer fram...

Page 30: ...ical Supply to Unit 2 Stainless steel drawer box must be removed from drawer 3 Remove drawer from unit Page 4 3 4 Lift center slide assembly out of unit and set aside 5 Remove 4 screws from fan baffle plate and set plate aside for reassembly See Figure 4 16 6 Disconnect wires from power board being careful to mark or label wires to insure proper wiring of new board See Figure 4 19 7 Unplug control...

Page 31: ... Figure 4 20 blow up 9 Unplug thermal cut out wires from thermal cut out and feed element plug and thermal cut out wires through insulators toward power board See Figure 4 20 10 Unplug control cable jumper from jack on power board and release from wire management clip See Figure 4 21 11 Remove 3 nuts that support thermal cut out plate See Figure 4 22 12 Thermal cut out is held to the plate with ri...

Page 32: ...o allow the unit bottom cover to be flexed away from the cavity to allow room for old gasket to be removed and new gasket to be installed See Figure 4 30 NOTE When reassembling unit do not forget to install screw support spacers See Figure 4 31 blow up These provide necessary support to prevent dam age to front collar when installation screws are rein stalled Metal edges may be sharp Use caution w...

Page 33: ...ector molex from element connector 2 depress two tabs on sides of element molex 3 push the element molex out of opening 6 Once element assembly is removed the element can be replaced Metal edges may be sharp Use caution when servicing unit to avoid personal injury Element may be hot Allow sufficient time for element cooling before attempting this repair ELECTRICAL SHOCK HAZARD DISCONNECT ELECTRICA...

Page 34: ...er slide assembly out of unit and set aside 5 Remove 4 screws from fan baffle plate and set plate aside for reassembly See Figure 4 16 6 Disconnect wires from power board being lead See Figure 4 35 7 Remove the large nut securing the power cord strain relief to the unit See Figure 4 35 8 Remove the power cord from the unit Metal edges may be sharp Use caution when servicing unit to avoid personal ...

Page 35: ...at all 5 5 B No Heat at Any or All Settings 5 5 C No Heat at PROOF Setting only 5 5 D Excessive Heat at Any or All Settings 5 5 E Excessive Condensation in Drawer 5 5 F Food Dries Out 5 6 G One or more LCD ON OFF indicator Temp Range Indicator or segment s of Temp Readout does not illuminate 5 6 H LCD is black 5 6 I One or more LCD ON OFF indicator Temp Range Indicator or segment s of Temp Readout...

Page 36: ...mistor if ok In FSM Field Service Mode view temper ature as viewed by thermistor Verify wiring ok to element Replace Thermistor if ok If unit outdoors and temperature below freezing point instruct on unit limitations Verify Thermal Cutout is not open Verify Element is not open Replace TCO or Element if open Check operation of Door Switch with Ohm meter Replace if defective Check ambient Temp and i...

Page 37: ...r is displayed in the temperature readout and 10 is displayed in the timer section You can also scroll through additional control information parameters such as total hours used See Figure 5 3 5 4 NOTE Using the opposite TIMER up or down arrow key will reverse your previous order NOTE To clear error codes logged press and hold TIMER up and down arrow keys for 5 seconds while in Field Service Mode ...

Page 38: ...r board Replace if no voltage present Check power to unit Plug unit in switch supply circuit breaker to ON position or replace fuse if defective Switch unit ON and set to desired temperature See Electronic Control Section for operational information After turning unit on selection must be made within 20 seconds or unit turns off Check all electrical connections and wires Reconnect or repair wiring...

Page 39: ...h lid or aluminum foil Food in drawer longer then 4 hrs will tend to dry out Instruct Customer Timer default is 4 hrs Check power to unit Plug unit in switch supply circuit breaker to ON position or replace fuse if defective Switch unit ON and set to desired temperature Use ohm meter to verify switch operation Replace switch if faulty See Electronic Control System Test Procedures following General...

Page 40: ... INFORMATION Domestic 850 Watts 16 9 10 Ohms NOTE For electronic control low voltage information see Wiring Schematic in this manual THERMAL CUT OUT TCO INFORMATION Auto Reset Open Temperature 213 8 F 37 4 F 101 C 3 C Close Temperature 158 F 40 1 F 70 C 4 5 C POWER BOARD IDENTIFICATION Domestic vs International Domestic 120VAC 50 60Hz Yellow Label International 240VAC 50 60Hz Green Label THERMISTO...

Page 41: ...Warming Drawer WWD30 2 Wire Diagrams 7 2 814750 Revision A January 2011 WWD30 WIRING DIAGRAM Domestic ...

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