Sub-Zero Wolf WWD30 Service Manual

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General Information

Installation Information

Controls & Operation

Component Access & Removal

Troubleshooting Guide

Technical Data

Wiring Diagrams

WWD30

Service Manual

subzero.com

800.222.7820

Table of Contents

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Summary of Contents for Sub-Zero Wolf WWD30

Page 1 subzero.com 800.222.7820 WWD30 Service Manual General Information Installation Information Controls & Operation Component Access & Removal Troubleshooting Guide Technical Data Wiring Diagrams...
Page 2: General Information
Technicians. The information and images are the copyright property of Wolf Appliance, Inc., an affiliate of Sub-Zero, 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 permission of Wolf Appliance, Inc., an affiliate of Sub-Zero, Inc.
Page 3: Warranty Information
WARMING DRAWER WWD30 General Information WARRANTY INFORMATION Serial Tag Located on left front floor area of inner cabinet with This page contains a summary of the 2 & 5 Year drawer fully opened Warranty that is supplied with every Wolf product, fol- lowed by a Non Residential Warranty summary, then notes about the warranties.
Page 4: Installation Information
WARMING DRAWER WWD30 Installation Information INSTALLATION INFORMATION The Wolf Warming Drawer is designed to be set into a built-in wall or cabinet installation. This section of the manual covers some of the installation issues that a service technician may need to know when servicing a Wolf warming drawer.
Page 5 WARMING DRAWER WWD30 Installation Information Cabinet Supports: NOTE: When the warming drawer is installed with a built-in oven, additional clearance between openings may be required. Check that oven supports do not obstruct the interior dimensions required for the warming drawer. NOTE: Dimensions in parentheses are in millimeters unless otherwise specified.
Page 6 WARMING DRAWER WWD30 Installation Information Undercounter Installation: For undercounter installations, 23 5/8" (600) from the bottom of the warming drawer opening to the floor is recom- 33"(838) RECOMMENDED CABINET mended. Electrical can be installed DIMENSION 2" (51) x 2" (51) WIDTH 30”...
Page 7 WARMING DRAWER WWD30 Electronic Control Information GENERAL INFORMATION: Electronic control will provide temperature control in the warming drawer as determined and set by user. Up and down arrow keys are provided to increase and decrease, respectively, the temperature of the drawer and operation time.
Page 8: Description Overview
WARMING DRAWER WWD30 Electronic Control Information DESCRIPTION OVERVIEW: Element: The element will be powered by the element relay (normally-open contacts). This allows the element to be disabled under most conditions. Only during a call for heat from the main controller, will the element relay be energized. Fan: The fan will be powered by the fan relay (normally-open contacts).
Page 9: System Modes
WARMING DRAWER WWD30 Electronic Control Information SYSTEM MODES: The control can be placed into several different operational modes which changes preset conditions inside the warm- ing drawer. Details as to what each mode does to the operation of the drawer can be found below. POWER UP: Power up is defined as the initial powering of unit through electrical cord.
Page 10 WARMING DRAWER WWD30 Electronic Control Information NORMAL WARMING MODE: Operations: (Continued) If temperature of unit is greater than 10ºF above setpoint, control will chime and “hot” will flash in the temperature display. Control will continue to check if temperature has dropped, every 20 seconds. Once temperature, as moni- tored by the thermistor, is within 10°F of set temperature, set temperature will be displayed and resume cycling nor- mally.
Page 11 WARMING DRAWER WWD30 Electronic Control Information PRESET MODES: (Proof Mode) Proof mode allows the customer to use the warming drawer for bread dough proofing. (See Figure 3-8) Mode Entry: Press the “Power On/Off” button followed by the “PROOF” key. HIGH POWER TEMP TEMP...
Page 12: Timer Mode
WARMING DRAWER WWD30 Electronic Control Information END OF WARMING TIME: Upon reaching “0:00”, “0:00” will begin flashing. Element and fan will shut off at this time. Control will also emit three chimes every 30 seconds to denote unit has shut off. After 5 minutes the timer will power down and turn unit off.
Page 13: Sabbath Mode
WARMING DRAWER WWD30 Electronic Control Information SABBATH MODE: To accommodate Sabbath holidays, a special mode exists where control will only react to the “Power On/Off” button. In Sabbath Mode, control display will not change. “ON” remains on all the time. LCD back lighting will also remain on at all times during this mode at a rate of 50% normal power.
Page 14 WARMING DRAWER WWD30 Electronic Control Information USER PREFERENCE SETUP NOTE: Following changes must be made when unit is in “ON” mode. Preset Change: Changes can be made to presets by completing the following sequence. Press “Power On/Off” key, then press pre- set key you wish to change and hold for 5 seconds.
Page 15 Electronic Control Information WARMING DRAWER WWD30 LED Back Lighting Change: Mode Entry: Enter backlight setting preference by pressing and holding both “TEMP” and “TIMER” up arrow keys for 5 seconds. Current backlight setting will appear in display. (See Figure 3-14) HIGH POWER TEMP...
Page 16: Field Service Mode
WARMING DRAWER WWD30 Electronic Control Information FIELD SERVICE MODE Initiating Diagnostics Mode: Note: Diagnostics mode can only be entered from a unit “‘OFF” state. Mode Entry: The Field Service mode can be entered by pressing and holding “Power On/Off” key, along with “MED” and “PROOF”...
Page 17: Temp Display
WARMING DRAWER WWD30 Electronic Control Information Field Service Mode Unique Keystrokes: KEYPRESS TEMP DISPLAY TIMER DISPLAY Enter Diagnostics rE (Sr if in showroom mode) 0018 (Meaning revision 1.8) TIMER TIMER TIMER TIMER TIMER TIMER TIMER (Control On Time) 1:60 = 16000 hr. (See note below) TIMER ELE (Element On Time) 95:00 = 950000 hr.
Page 18 Electronic Control Information WARMING DRAWER WWD30 Field Service Mode Functional Test Keystrokes: KEYPRESS TEMP DISPLAY TIMER DISPLAY “ON” INDICATOR Func ON (Relay closed, TEMP Element on) Func OFF (Relay Opens, TEMP Element Off) Func ON (Relay closed, Fan TEMP turns on) Func OFF (Relay Opens, Fan TEMP...
Page 19 W W A A R R M M I I N N G G D D R R A A W W E E R R W W W W D D 3 3 0 0 Component Access & Removal COMPONENT ACCESS AND REMOVAL This section explains how to access and remove components from a model WWD30 Warming Drawer.
Page 20 WARMING DRAWER WWD30 Component Access & Removal Stainless Steel Drawer Box Lift Here The side flanges of the stainless steel drawer box rest on top of the drawer frame. To remove the drawer box, begin by opening the drawer until the stops are engaged. Then, at the center of left and right side flanges lift drawer box.
Page 21 Component Access & Removal WARMING DRAWER WWD30 Drawer Slide Removal The drawer slides are attached to the drawer frame by threaded studs that are pressed into the drawer frame sidewalls. The interior drawer slides are secured with screws to the slide brackets. Remove Nuts To remove the drawer slide assemblies, begin by Figure 4-3.
Page 22 WARMING DRAWER WWD30 Component Access & Removal Control Cable Removal The control cable runs from a jack mounted on the Remove Cable From underside of the control board, through a hole in the Under Clip(s) right side of the drawer frame and continuing along the right side of the drawer, through a cable guard, where it Hole for Control Cable is secured by retaining clips along the back.
Page 23 Component Access & Removal WARMING DRAWER WWD30 Thermistor Removal The thermistor is mounted to the inside wall of the draw- er frame assembly, just below the control panel and behind an insulated panel. Screws, which are accessi- ble by removing the insulated panel, secure the thermis- tor to the inside wall of drawer frame assembly.
Page 24 WARMING DRAWER WWD30 Component Access & Removal Power Board Removal NOTE: Electrical shock potential. Refer to warnings on page 4-2. Remove Screws The power board is located to the right of the fan assembly on the outer back panel of unit. Four expand- ing mandrels secure the power board to the outer back panel.
Page 25 Component Access & Removal WARMING DRAWER WWD30 Thermal Cutout Remove Screws NOTE: Electrical shock potential. Refer to warnings on page 4-2. The thermal cutout is mounted above and to the left of the fan assembly on the inner back panel. To remove the thermal cutout, begin by removing the drawer and cavity baffle from the unit.
Page 26: Troubleshooting Guide
This section of the manual contains the General Troubleshooting Guide which will help the Service Technician trou- bleshoot a Wolf WWD30 unit. Following the General Troubleshooting Guide is the Electronic Control System Test Procedures to be performed after going through the General Troubleshooting Guide and determining that the elec- tronic control system is suspect.
Page 27: Error Code
WARMING DRAWER WWD30 Troubleshooting Guide ERROR CODE TROUBLESHOOTING GUIDE: ERROR CODE CAUSE TEST / ACTION Incorrect checksum Replace Control Board (Invalid Checksum Error) In FSM (Field Service Mode), view temper- Temperature >300ºF ature as view by thermistor. Verify wiring (Thermistor Open) ok to element.
Page 28 WARMING DRAWER WWD30 Troubleshooting Guide General Troubleshooting Guide PROBLEM POSSIBLE CAUSE TEST / ACTION Check power to unit. Plug unit in, switch supply A. Unit Does Not Function at All No Power to Unit circuit breaker to ON position or replace fuse if defective.
Page 29 WARMING DRAWER WWD30 Troubleshooting Guide PROBLEM POSSIBLE CAUSE TEST / ACTION F. Food Dries Out Temperature Setting too High Reduce temperature setting. Food Uncovered Cover food with lid or aluminum foil. Food in Drawer too Long Food in drawer longer then 4 hrs. will tend to dry out.
Page 30: Technical Data
Technical Data WARMING DRAWER WWD30 TEMPERATURE INFORMATION Temp. Setting Preset Temp. Temp. Setting Range Approximate Preheat Time HIGH 200°F 80°F - 200°F 20 Minutes MEDIUM 160°F 80°F - 200°F 15 Minutes 80°F - 200°F 120°F 8 Minutes (Recommended 145°F - 159°F) 80°F - 110°F PROOF 85°F...
Page 31: Wiring Diagrams & Schematics
WARMING DRAWER WWD30 Wiring Diagrams & Schematics WWD30 WIRING DIAGRAM (Domestic) 3-CONDUCTOR POWER CORD REAR CONTROL BOARD White White Black Black (CE/CB Models Only) N / L2 White White White Black White Black ELEMENT Black Black FRONT CONTROL BOARD Gray COMMUNICATIONS CABLE White COMMUNICATIONS CABLE ROUTING...
Page 32 WARMING DRAWER WWD30 Wiring Diagrams & Schematics WWD30 WIRING DIAGRAM (International) White White REAR CONTROL BOARD Black Black Green White White N / L2 White TRANSFORMER Black White Black ELEMENT Black FRONT CONTROL BOARD Gray COMMUNICATIONS CABLE White COMMUNICATIONS CABLE ROUTING White Blue DRAWER SWITCH...