Related Manuals for Menumaster Jetwave JET14 Series
Summary of Contents for Menumaster Jetwave JET14 Series
- Page 1 SERVICE/TRAINING MANUAL FEATURES & INSTALLATION COMPONENT SAFETY SPECIFICATIONS OVERVIEW LOCATIONS WIRING INFORMATION SERVICE TEST MODE COMPONENT POWER OUTPUT RESOURCES & USER OPTIONS ACCESS TEST...
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Page 2: Table Of Contents
Table of Contents FEATURES & OVERVIEW Features & Overview Heater Box/Heater SPECIFICATIONS Interlock Switch Specifications Monitor Relay Board Power Relay INSTALLATION Clearances and Placement Thermal Cutouts Radio Interference Triacs Earthing Instructions HIGH VOLTAGE COMPONENTS SAFETY Capacitors & Diodes High Voltage Transformer Microwave Service Magnetron Discharging Capacitors... -
Page 3: Specifications
SPECIFICATIONS Models JET14* JET19* JET514 Power Source Voltage AC 208-240 VAC 208-240 VAC 230 VAC Amperage (Single Unit) 16 A 26 A 16 A Frequency 60 Hz 60 Hz 50 Hz Single Phase, 3 wire grounded Receptacle 6-20R 6-30R CEE5/7 Plug 6-20P 6-30P... -
Page 4: Installation
INSTALLATION Oven Clearances A—For North American (UL/CSA) models, allow at least 2” (5.1 cm) of clearance around top of oven. For International (50 Hz) models, allow at least 7” (17.8 cm) of clearance around top of oven. Proper air flow around oven cools electrical components. -
Page 5: Radio Interference
INSTALLATION Radio Interference Microwave operation may cause interference to radio, television, or a similar oven. Reduce or eliminate interference by doing the following: • Clean door and sealing surfaces of oven according to instructions in Care and Cleaning section. • Place radio, television, etc. as far as possible from oven. •... -
Page 6: Earthing Instructions
INSTALLATION Earthing Instructions Oven MUST be grounded. The plug must be plugged into an outlet that is properly installed and grounded. Consult a qualified electrician or servicer if grounding instructions are not completely understood, or if doubt exists as to whether the oven is properly grounded. Do not use an extension cord. -
Page 7: Safety - Microwave Service
SAFETY – MICROWAVE SERVICE Microwave Ovens produce voltage up to -5000 volts DC! Microwave Oven Capacitors can store high voltage even with oven unplugged! Always discharge capacitors whenever checking high voltage components! Always disconnect the power supply before servicing! NEVER perform high voltage tests! Wear appropriate eye and hand protection! Follow safety precautions in Product and Service literature! Test oven operation after repairs are completed! -
Page 8: Discharging Capacitors
SAFETY - DISCHARGING CAPACITORS ALWAYS DISCHARGE CAPACITORS BY SHORTING TERMINALS USING AN INSULATED TOOL(s) CAPACITORS CAN HOLD HIGH VOLTAGE EVEN WHEN POWER TO OVEN IS DISCONNECTED! -
Page 9: Microwave Emissions
SAFETY – MICROWAVE EMISSIONS FOOD AND DRUG ADMINISTRATION DEPARTMENT OF HEALTH AND HUMAN SERVICES SUBCHAPTER J – RADIOLOGICAL HEALTH PART 1030 -- PERFORMANCE STANDARDS FOR MICROWAVE AND RADIO FREQUENCY EMITTING PRODUCTS Sec. 1030.10 Microwave ovens..(v) One (the primary) required safety interlock shall prevent microwave radiation emission in excess of the requirement of paragraph (c)(1) of this section;... - Page 10 SAFETY – MICROWAVE EMISSIONS To ensure the unit does not emit excessive microwave leakage and meets Government Agency guidelines, check the oven for microwave leakage using Narda model 8100, 8200 Holaday HI1500, HI1501, or Simpson 380M leakage monitor as outlined in the instructions.
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Page 11: Front
Front View Top Touch Panel Side Touch Panel Removable Air Filter & Drip Pan... -
Page 12: Right Side
Right Side View MAGNETRON MAGNETRON BLOWER DISPLAY BOARD MAGNETRON DUCT HOUSING MAGNETRON TOUCH PANEL EXHAUST INTERLOCK SWITCHES SIDE TOUCH PANEL POWER RELAY TRANSFORMER HARNESS, DISPLAY TO HV BOARD TRIACS (3) CAPACITORS MONITOR HV BOARD DIODES RELAY BOARD... -
Page 13: Left Side
Left Side View THERMAL ANTENNA ANTENNA ANTENNA CUTOUT GEAR GEAR MOTOR BLOWER MOTOR CONVECTION DOOR MOTOR POWER CORD TERMINAL BLOCK Oven/Cavity TCO FUSE & FUSE BLOCK... -
Page 14: Bottom
Bottom View BOTTOM ANTENNA MOTOR ACCESS PANEL USB PORT REMOVABLE AIR FILTER & DRIP TRAY... -
Page 15: Top
Top View BLOWER MOTOR HEATER THERMAL TEMP CUTOUT SENSOR 31866P01 REAR ANTENNA WAVEGUIDE/ GEAR CAVITY ANTENNA THERMAL MOTOR CUTOUT 31866P01 FRONT WAVEGUIDE/ ANTENNA CAVITY GEAR Note: Waveguide / Cavity is not replaceable... -
Page 16: Door
DOOR VIEW TO ACCESS INNER DOOR COMPONENTS: Remove 2 Crosshead Screws, 4 hole plugs, and 4 #15 Torx Screws (one in each corner) Then outer door can be removed from inner door panel assembly. Screws LATCH ASSEMBLY NOTE: If magnetized tools are not used, then it is recommended to have the door removed and lying flat, otherwise, screws may fall inside door weldment and be very difficult to retrieve. - Page 17 DOOR VIEW Two Components within the door assembly: Door Hinge Spring found on the Upper Hinge Assembly (helps keep door open for easier food removal) and the Door Latch Assembly DOOR SPRING Mounting Screws Upper Hinge Spring DOOR LATCH ASSEMBLY...
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Page 18: Antenna/Stirrers
ANTENNA/STIRRER – ACCESS ANTENNA COVER RETAINING CLIP (4 ANTENNA COVER (Ceramic) Remove the four retainer clips while supporting the antenna cover OVEN EXHAUST (2) CONVECTION FAN OVEN TEMP SENSOR AIR INLET RACK... - Page 19 ANTENNA/STIRRER – Inside Cavity with Cover Removed FRONT ANTENNA REAR ANTENNA Note the positioning. Antennas Should NEVER be in line with each other...
- Page 20 ANTENNA MOTOR – TESTING/REMOVAL Note the position of top oven thermal Terminal to Terminal - Approx. 12,000Ω cutout mounting bracket. The TCO should fit firmly to the top of the cavity Disconnect wiring and remove three securing screws and lift off Antenna Motor Bracket...
- Page 21 ANTENNA MOTOR – REMOVAL Cont’d ENSURE PROPER ALIGNMENT “Triangle to Dot to Triangle to Dot” WHEN REASSEMBLING ANTENNA SYSTEM, THIS ENSURES PROPER ANTENNA POSITIONING INSIDE THE OVEN CAVITY...
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Page 22: Blower Fan Motor
BLOWER MOTOR – RESISTANCE TESTING 60HZ Dual Voltage Rated Products Common to 208V = +/- 24Ω 230V = +/- 26Ω USE CAUTION WHEN REMOVING WIRING. TERMINALS CAN BE PULLED OUT OF MOTOR BODY CAUSING DAMAGE TO MOTOR ASSEMBLY... - Page 23 BLOWER MOTOR – VOLTAGE TESTING 60HZ Dual Voltage Rated Products COMMON = LINE 1 via Board LINE 2 (if 208vac) via Board LINE 2 (if 230vac) via Board BLOWER MOTOR IS DUAL VOLTAGE RATED. CONTROL BOARD SENSES INCOMING LINE VOLTAGE AND SENDS TO MOTOR USE CAUTION WHEN REMOVING WIRING.
- Page 24 BLOWER MOTOR - REMOVAL 1) Remove wiring (note wire locations) 2) Remove Blower Box Cover 3) Remove Blower Scroll Housing 4) Remove Blower Wheel Securing Screw (Securing Screw) 5) Remove two Blower motor mounting screws located behind blower wheel BLOWER SCROLL BLOWER SCROLL HOUSING HOUSING BLOWER WHEEL...
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Page 25: Control Board
CONTROL BOARD - Removal Note wiring locations before removing wires. Control Board mounts via clips. Four along the top; 3 along the bottom. - Page 26 CONTROL BOARD – CONNECTOR LOCATIONS (refer to wiring schematic) – not used J1 – LINE 208/230V...
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Page 27: Convection Fan Motor
CONVECTION FAN – VOLTAGE TESTING USE CAUTION WHEN REMOVING WIRING. TERMINALS CAN BE PULLED OUT OF MOTOR BODY CAUSING DAMAGE TO MOTOR ASSEMBLY LINE 2 (if 208vac) via Board LINE 2 (if 230vac) via Board COMMON = LINE 1 via Triac CONVECTION FAN MOTOR IS DUAL VOLTAGE RATED. - Page 28 CONVECTION FAN – RESISTANCE TESTING USE CAUTION WHEN REMOVING WIRING. TERMINALS CAN BE PULLED OUT OF MOTOR BODY CAUSING DAMAGE TO MOTOR ASSEMBLY BU = +/- 24Ω OR = +/- 22Ω BR = Common CONVECTION FAN MOTOR IS DUAL VOLTAGE RATED. CONTROL BOARD SENSES INCOMING LINE VOLTAGE AND SENDS TO MOTOR via TRIAC...
- Page 29 CONVECTION FAN – REMOVAL 1) Remove Rear Fan Blade and wiring 2) Remove Heater Box Assembly 3) Remove Convection Fan Blade (1/2 in. Cap Nut) (note order of clip, washers, and blade) 4) Remove three 5/16 in. securing screws 5) Remove Motor from Bracket and Insulation 1/2 IN.
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Page 30: Display Board
DISPLAY BOARD – CONNECTOR LOCATIONS BACK TOP TOUCH PANEL (installed SIDE TOUCH PANEL PROGRAM PORT External Speaker HV/LV HARNESS (Not Used (Not Used FRONT DISPLAY SPEAKER SCREEN... -
Page 31: Fuse
FUSE – ACCESS/REMOVAL REAR OF UNIT An open main fuse caused by high amperage requires the replacement of the Monitor Relay Board since high current will cause the monitor relay OVEN board’s contacts to stick. This is a UL THERMAL requirement. -
Page 32: Catalyst Assy
CATALYST ASSY - ACCESS/REMOVAL HOUSING Remove blower and air duct cover Remove duct top and blower motor assy. Fold insulation away from catalyst assy. to access screws... - Page 33 CATALYST ASSY - ACCESS/REMOVAL Remove screws (10) slide out of housing Has high temperature gasket part # 59134320...
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Page 34: Heater Box/Heater
HEATER BOX – ACCESS to Heater & Convection Fan Motor Remove Blower Motor Housing Assembly Remove three (3) rear ¼ inch Machine Compartment Bracket screws for the Heater Box... - Page 35 HEATER BOX – ACCESS 2 Do Not Tear or Remove the protective High Voltage Polymide Tape part # M0275051 Remove High Voltage Transformer Remove High Voltage Transformer by removing wiring (noting wire location), sliding out of base and lifting out...
- Page 36 HEATER BOX – ACCESS 3 Remove Back, High Voltage Transformer, Blower Assembly Housing, and the three (3) rear board bracket screws TAPE* Carefully cut tape and pull the insulation from the perimeter of the heater box Remove Heater Wiring And Two Convection Motor Mounting Screws * 15’...
- Page 37 HEATER BOX – REMOVED EXHAUST SPACERS GREASE CHANNEL...
- Page 38 HEATER ALWAYS USE CAUTION WHEN MAKING LIVE VOLTAGE TESTS Ohm/Resistance Test Voltage Testing with Component On Terminal to Terminal with at least one wire Terminal to Terminal with wires Disconnected = +/- 16Ω securely attached = Line Voltage...
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Page 39: Interlock Switch
INTERLOCK SWITCH ASSEMBLY - Removal With Door Open, Assembly can be Remove two (2) screws lifted up and out Remove Bracket Screw... - Page 40 INTERLOCK SWITCH ASSEMBLY - Testing PRIMARY INTERLOCK SWITCH Open-Infinite Ω with Door Open Closed-Continuity 0 Ω with Door Closed MONITOR INTERLOCK SWITCH Open-Infinite Ω with Door Open Closed-Continuity 0 Ω with Door NC Terminal Closed not used SECONDARY INTERLOCK SWITCH Open-Infinite Ω...
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Page 41: Monitor Relay Board
MONITOR RELAY BOARD - REMOVAL Note: An open main fuse caused by high amperage requires the replacement of the Monitor Relay Board since high current will cause the monitor relay board’s contacts to stick. This is a UL requirement. Disconnect both wire connectors and remove screw. - Page 42 MONITOR RELAY BOARD - TESTING 1) Unplug Unit 2) Disconnect J2 Connector Test leads at J2-1 to J2-4 and check for Continuity 0 Ω as shown. 3) Plug Unit In 4) J2-1 to J2-4 should now read Open/Infinite Ω ALWAYS USE CAUTION WHEN MAKING LIVE VOLTAGE TESTS...
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Page 43: Power Relay
POWER RELAY-ACCESS/REMOVAL Relay is tabbed into mounting bracket Remove wiring and securing screw at bottom of relay... - Page 44 POWER RELAY- TESTING PURPOSE of POWER RELAY: When powered, the Power Relay provides Line 2 through the Triac to the common terminal of the High Voltage Transformer. OPEN/Infinite Ω when 0 & 1 are unpowered OPERATION OF POWER RELAY: Line voltage is supplied across terminals 0 & 1 via 6M to 7MΩ...
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Page 45: Rtd
RTD (TEMPERATURE SENSOR) - TESTING/REMOVAL THE RTD (resistive thermal device) is the temperature sensor for the unit. Its resistance value increases as temperature increases Unplug wire connector measure across terminals APPROX. 1100Ω at room temperature APPROX. 1650Ω at 350 F / 177 C To Remove: Remove securing nut and bolt (inside cavity) and remove the sensor from the cavity top. -
Page 46: Thermal Cutouts
THERMAL CUTOUTS (TCO) - TOP CAVITY THERMAL CUTOUT Connects in a looping circuit to Control Board. Failure (open) causes a “HOT” error code until it resets. Purpose is to protect against high oven temperatures and no food loads. SPECIFICATIONS for both TCO’s Open/Infinite Ω... - Page 47 THERMAL CUTOUTS (TCO) – RIGHT SIDE FRONT REAR Mag TCO part# B5684130 MAGNETRON MAGNETRON THERMAL CUTOUT THERMAL CUTOUT SPECIFICATIONS Open-Infinite Ω at 300° F (149° C) Closed-0 Ω at 257° F (125° C) Ohm/Resistance Test Terminal to Terminal with at least one wire disconnected and below 300°...
- Page 48 THERMAL CUTOUT (TCO) – LEFT SIDE OVEN THERMAL CUTOUT In series with Top Cavity Thermal Cutout and in circuit that provides line voltage to Control Board. Failure (open) causes a “dead” unit symptom. This Thermal Cutout does NOT reset. Purpose is to protect against extreme oven temperatures and render the oven as non-usable until causes are corrected SPECIFICATIONS...
- Page 49 NEW THERMAL CUTOUT (TCO) – BOTTOM LEFT SIDE OVEN THERMAL CUTOUT In series with Top Cavity Thermal Cutout and in circuit that provides line voltage to Control Board. Failure (open) causes a “dead” unit symptom. This Thermal Cutout DOES reset. Purpose is to protect against extreme oven temperatures and render the oven as non-usable until the unit cools down and resets...
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Page 50: Triacs
TRIACS – RESISTANCE TESTING CONVECTION HEATER TRIAC MAGNETRON TRIAC MOTOR TRIAC Triac = A three electrode semiconductor device that will conduct in either direction when triggered by a positive or negative signal at the gate electrode Gate Ohm/Resistance Test MT1 to MT2 - Open-Infinite Ω MT1 to Gate - Approximately 60Ω... - Page 51 TRIACS – VOLTAGE TESTING Gate ALWAYS USE CAUTION WHEN MAKING LIVE VOLTAGE TESTS Voltage Testing with Component On MT1 to MT2 - 0vac. If line voltage is read, Triac is open so check gate voltage/signal MT1 to Gate - Approx. 0.8vac. No voltage Indicates no signal from control board.
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Page 52: Capacitors & Diodes
CAPACITORS & DIODES– ACCESS/REMOVAL Slide assembly out REMOVE THREE BRACKET SCREWS DIODES – RIGHT TWO BRACKET SCREWS NEVER TEST HIGH VOLTAGE CARRYING COMPONENTS WITH UNIT POWERED AND ALWAYS DISCHARGE CAPACITORS BEFORE TESTING COMPONENTS... - Page 53 DIODE TESTING 1 ALWAYS DISCHARGE CAPACITOR BEFORE HANDLING! MANY VOLT/OHM METERS (DIGITAL OR ANALOG) IN USE TODAY CANNOT READ THE VERY HIGH RESISTANCE ACROSS THE DIODE. METER NEEDS A MINIMUM OF 6 VOLTS OUTPUT ON OHMS SCALE. FOR METERS CAPABLE, RUN THE FOLLOWING TEST. REMOVE DIODE LEAD FROM CAPACITOR AND CONNECT OHMMETER.
- Page 54 DIODE TESTING 2 ALWAYS DISCHARGE CAPACITOR BEFORE HANDLING! MANY VOLT/OHM METERS (DIGITAL OR ANALOG) IN USE TODAY CANNOT READ THE VERY HIGH RESISTANCE ACROSS THE DIODE. METER NEEDS A MINIMUM OF 6 VOLTS OUTPUT ON OHMS SCALE. THE RESULT IS MANY DIODES ARE IMPROPERLY DIAGNOSED.
- Page 55 CAPACITOR TESTING Capacitance meters are available commercially and are a fast way to help diagnose capacitors. Capacitor values can be obtained by looking at its rating label. Values vary from model to model 2300 VOLTS AC 0.74 MICROFARAD 10M OHM BLEEDER RESISTOR GOOD...
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Page 56: High Voltage Transformer
HIGH VOLTAGE TRANSFORMER - RESISTANCE TESTING NEVER TEST HIGH VOLTAGE CARRYING COMPONENTS WITH UNIT POWERED AND ALWAYS DISCHARGE CAPACITORS BEFORE TESTING COMPONENTS PRIMARY WINDINGS COMMON – 208 = <2Ω COMMON – 230 = <2Ω OPEN TO GROUND FILAMENT WINDINGS 5-6 & 7-8 LESS THAN 1Ω OPEN TO GROUND HIGH VOLTAGE SECONDARY (HV4) APPROX. - Page 57 HIGH VOLTAGE TRANSFORMER LINE VOLTAGE ISOLATION TEST For MW No Heat or Low Heat Condition IN A COOK CONDITION 208 Line Voltage, test between Com. & 208 results should be 208 Volts 230 Line Voltage, test between Com. & 230 results should be 230 Volts If not remove wires and test from each wire to chassis ground - should be 115V.
- Page 58 HIGH VOLTAGE TRANSFORMER - REMOVAL 1) Remove Cabinet and Back Panel 2) Remove Transformer wiring (note wire connections) 3) Remove securing screw 4) Slide Transformer to the right approx. one inch. 5) Lift Transformer up and out of securing tab/slot REMOVE SECURING SCREW SECURING TAB/SLOT...
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Page 59: Magnetron
MAGNETRON - TESTING Since Magnetron wiring is covered by an air duct, testing can be made at High Voltage Transformer and Capacitor. Note wire locations and disconnect appropriate wires from Capacitor and High Voltage Transformer Back Magnetron WIRE 5 to WIRE 6 LESS THAN 1Ω... - Page 60 MAGNETRON ACCESS (REAR) UNCLIP REMOVE TCO WIRING (Thermal Cutout ) Wiring (3 LOCATIONS) REMOVE COVER...
- Page 61 MAGNETRON ACCESS/REMOVAL DISCHARGE CAPACITORS THEN REMOVE MAGNETRON WIRING REMOVE BRACKET SCREW and SWING BRACKET DOWN MAGNETRON WIRING POSITIONED IN CENTER OF AIR DUCT...
- Page 62 MAGNETRON REMOVAL (REAR) CONT’D REMOVE 4 - 5/16 NUTS AND DROP MAGNETRON OUT OF WAVEGUIDE Upon reassembly always ensure high voltage wiring is firmly secured to magnetron connections...
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Page 63: Service Test Mode
SERVICE TEST MODE 1) Open and Close the Door 2) In order, press and release the following key pads; Hidden Pad, 1, 3, 5, 7, then 9. (Note: No keypad beep or display change will occur while pressing keypads) Display will show “Service Mode” and reflect Hz and Line Voltage sensed. Once in Service Mode, pressing another keypad will activate a specific test:... -
Page 64: User Options
USER OPTIONS 1) Open and close the door. 2) Press and release the Hidden Pad, then quickly press and release Program Save. 3) Press desired numeric key pad for specific option. 4) To change an option, press numeric pad again. 5) To Save a change, press the Program Save pad. -
Page 65: Power Output Test
MICROWAVE POWER TEST... -
Page 66: Diagram
WIRING DIAGRAM... -
Page 67: Schematic
WIRING SCHEMATIC...
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