Subzero Wolf MD24, Service Manual

Page 1: ...neral Information 2 Installation Information 7 Controls Operation 10 Component Access Removal 17 Troubleshooting Guide 25 Wiring Diagrams 41 subzero com 800 222 7820 MD Microwave Drawers Service Manua...

Page 2: ...any questions regarding the appli ance and or this manual please contact Wolf Appliance Inc ATTN Service Department P O Box 44988 Madison WI 53744 4988 Customer Assistance Phone 800 332 9513 Facsimile...

Page 3: ...and Cautions 4 2 Microwave Measurement Procedure 4 3 Before Operating Oven after Service 4 3 Emergency Opening of Drawer 4 4 Un installing the Microwave Drawer 4 4 Removing Cord and Outer Case 4 4 Acc...

Page 4: ...L 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 product...

Page 5: ...el and 10 programmable power levels Interactive display 99 minutes 99 seconds Oven drawer with window Control lock Oven light comes on when oven is operating or drawer is open Tight drawer seals with...

Page 6: ...d that the cleaner be applied to a soft cloth and then carefully used on the stainless exterior rather than sprayed directly on to it Follow package directions carefully Front Side of Drawer Wipe the...

Page 7: ...CODES DO NOT USE AN EXTENSION CORD IF POWER SUPPLY CORD IS TOO SHORT HAVE A QUALIFIED ELEC TRICIAN OR SERVICEMAN INSTALL AN OUTLET NEAR THE APPLIANCE Electrical Requirements This appliance must be gro...

Page 8: ...he weight of the oven about 125 pounds 57 kg Check location where the Microwave Drawer will be installed for proper electrical supply Your oven can be built into a cabinet or wall by itself or under a...

Page 9: ...rawer ovens require the same opening dimensions Dashed line represents profile of unit 14 3 4 375 OPENING HEIGHT ANTI TIP BLOCK W OPENING WIDTH TOP VIEW BASE SUPPORT 301 8 765 221 8 562 4 102 217 8 55...

Page 10: ...SIGNAL An audible signal will chime with every touch and upon cook time and timer completion To Eliminate Audible signal 1 Touch SETTINGS twice 2 Touch START SOUND OFF will appear on the control panel...

Page 11: ...store Cook Time Completion Reminder 1 Touch SETTINGS three times 2 Touch START REMIND SIGNAL ON will appear on control panel display DEMONSTRATION MODE Demonstration mode allows operation to be demons...

Page 12: ...feature will keep food warm for up to 90 minutes To use Keep Warm 1 Touch KEEP WARM 2 Use number pads to enter desired keep warm time 3 Touch START 4 Touch STOP CLEAR to cancel POPCORN The popcorn fe...

Page 13: ...ically adjusts cook time and power level To select Sensor Reheat 1 Touch SENSOR REHEAT 2 Touch START TIME ADJUSTMENT sensor cooking settings The time adjustment feature increases or decreases cook tim...

Page 14: ...are de energized oven lamp remains on and digital read out displays time still remaining in cook cycle when door was opened 7 The monitor switch electrically monitors the operation of secondary interl...

Page 15: ...d not be operated on sensor immediately after plugging in unit Wait two min utes before cooking on SENSOR 2 Coil of shut off relay RY 1 is energized but power transformer is not turned on 3 After abou...

Page 16: ...MD24 and MD30 Theory of Operation 3 8 824820 Revision A November 2013...

Page 17: ...ING 1 DISCONNECT POWER SUPPLY CORD OPEN DRAWER WAIT 60 SECONDS THEN DISCHARGE THE HIGH VOLTAGE CAPACITOR 2 DON T LET THE WIRE LEADS TOUCH TO THE FOLLOWING PARTS HIGH VOLTAGE PARTS MAGNETRON HIGH VOLTA...

Page 18: ...portant not only to protect oven but also to insure that any leakage is measured accurately C Set the cooking control on Full Power Cooking Mode D Close drawer and select a cook cycle of several minut...

Page 19: ...AC Cord attached and unplug AC Cord from molex See Figure 4 2 2 Extract eighteen 18 screws holding the Outer Case Side Angles and latch cover plates 3 Remove Outer Case See Figure 4 2 AC Cord Mount A...

Page 20: ...g Monitor Stop and Secondary Interlock Switches 1 Follow Microwave Drawer disassembly as previously stated 2 Open drawer and keep it open 3 To discharge high voltage capacitor wait for 60 sec onds 4 I...

Page 21: ...ve Drawer disassembly as previously stated 2 Open drawer and keep it open 3 To discharge high voltage capacitor wait for 60 sec onds 4 Remove two Drawer Support Covers from Choke Cover See Figure 4 8...

Page 22: ...cing the Auto drawer Gear it will not be necessary to follow Microwave Drawer Disassembly 2 Turn Drawer up on its back and knockout Auto Drawer Gear hole cover See Figure 4 12 3 Unhook wiring connecto...

Page 23: ...y interlock switch and monitor switch are operating properly 2 An approved microwave survey meter should be used to assure compliance with proper microwave radiation emission limitation standards 3 Dr...

Page 24: ...Component Access MD24 and MD30 4 9 824820 Revision A November 2013...

Page 25: ...er to the unit with outer cabinet case removed See CAUTION above In this event 1 Disconnect power supply cord and then remove outer cabinet case 2 Open door and block it open 3 Discharge high voltage...

Page 26: ...er should sound and or time of day should appear in display Oven seems to be operating but little or no heat is produced in oven load Food incompletely cooked or not cooked at all at end of cook cycle...

Page 27: ...ntrol Panel Assembly 1 Replace Control Panel Assembly Left side only keys not operating 1 Reseat keyboard connection cable between Left and Right keyboards Reseat Display Harness between right side ke...

Page 28: ...t you have correct voltages at the PSU Drawer board and there is still no operation of one of the above items then perform a voltage check of RY1 RY2 RY3 and RY4 Relays These relays are operated by D...

Page 29: ...ked PSU DRAWER BOARD FUSE IS OPEN To protect electronic circuits this model is provided with a non replaceable fuse on the PSU Drawer board 1 Fuse check and repairs Disconnect power supply cord Remove...

Page 30: ...ng insulation tape After procedure re connect power supply cord Follow troubleshooting guide given below for repair COMPONENT TEST PROCEDURE LETTER E continued STEPS OCCURRENCE CAUSE OR CORRECTION 1 C...

Page 31: ...s or cleaning solvents near oven while using Sensor settings Sensor will detect vapor given of by spray and turn off before food is properly cooked 8 If sensor has not detected vapor of the food ERROR...

Page 32: ...ner on center of tray in oven cavity Close drawer Touch the TIMER CLOCK pad once POWER LEVEL pad twice and START pad once Touch number pad 1 once and number pad 4 once CPU Drawer board is in automatic...

Page 33: ...um temperature is recorded 4 Subtract cold water temperature from hot water temperature The normal result should be 28 to 54 F 16 to 30 C rise in temperature If water tem peratures are accurately meas...

Page 34: ...er supply cord 2 Open drawer and keep it open 3 To discharge high voltage capacitor wait for 60 seconds 4 Isolate switch and connect ohmmeter to the common COM and normally open NO terminal of switch...

Page 35: ...monitor switch COM terminal and check continuity of monitor circuit 5 Reconnect all leads removed from components during testing 6 Reassemble unit 7 Reconnect power supply cord 8 Run oven and check al...

Page 36: ...age coil should be approximately 90 ohms resistance of filament coil should be less than 1 ohm 5 Reconnect all leads removed from components during testing 6 Reassemble unit 7 Reconnect power supply c...

Page 37: ...ading If a short is indicated in both directions or if an infinite resistance is read in both directions rectifier is probably defective and should be replaced 5 Reconnect all leads removed from compo...

Page 38: ...n ohm meter Checking with a high ohm scale if high voltage capacitor is normal meter will indicate continuity for a short time and should indicate an open cir cuit once capacitor is charged If above i...

Page 39: ...D24 and MD30 Troubleshooting Guide 5 16 824820 Revision A December 2013 Figure 5 6 CPU Drawer Board Front and Back Figure 5 7 SW PSU Drawer Board Monitor Fuse Monitor Fuse Figure 5 8 Noise Filter Boar...

Page 40: ...Troubleshooting Guide MD24 and MD30 5 17 824820 Revision A December 2013...

Page 41: ...R FUSE 20A CUT OUT THERMAL THERMAL OVEN MAG CUT OUT H N GRN NOISE FILTER GND TO SOURCE TO LOAD TO LOAD TO SOURCE FAN MOTOR SM FM OL A5 STIRRER MOTOR OVEN LAMP SECONDARY INTERLOCK SWITCH RY1 RY2 CAPACI...

Page 42: ...2 3 4 5 6 7 WHT WHT 8 WHT WHT WHT WHT WHT WHT 1 2 3 4 5 6 7 WHT WHT WHT CNH 9 8 10 WHT WHT WHT WHT WHT WHT 1 2 3 4 5 BLU WHT RED DC MOTOR ORG GRN BLK WHT WHT GRN GRN GRN GRY CN H CN A COM N O RY1 RY2...