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Service

50hz

XPRESS IQ

™

High Speed Oven

Service Manual

This  Manual  covers  the  ARX  &  MRX,  50hz,
XPRESS IQ™ High Speed Ovens equipped with
Touch  Screen  Controls.  Refer  to  individual
Service  Manuals  or  Technical  Sheets  for
information on other specific models.

MRX51*

ARX51*

MRX51U*

MRX52*

ARX52*

MRX523*

16400035

Rev.2

May 2018

This manual is to be used by qualified
service technicians only. ACP, Inc.
does not assume any responsibility for
property damage or personal injury for
improper service procedures done by
an unqualified person.

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Summary of Contents for ARX51 Series

Page 1: ...to individual Service Manuals or Technical Sheets for information on other specific models MRX51 ARX51 MRX51U MRX52 ARX52 MRX523 16400035 Rev 2 May 2018 This manual is to be used by qualified service technicians only ACP Inc does not assume any responsibility for property damage or personal injury for improper service procedures done by an unqualified person ...

Page 2: ...rmware Update Procedure 12 Care and Cleaning 13 Oven Construction 14 Component Testing Procedures 20 Interlock Switch Service 22 Service Test Mode 23 Error Code List 26 Microwave Power Test 27 Control Board Wiring 28 Wiring Diagrams Schematics 29 Accessories 37 http services acpsolutions com SERVICE PARTS SUPPORT ...

Page 3: ...pedwiththepropertools parts testing instruments and the appropriate service information IT IS THE TECHNICIANS RESPONSIBLITY TO REVIEW ALL APPROPRIATE SERVICE INFORMATION BEFORE BEGINNING REPAIRS ComServ Support Center Web Site Telephone Number WWW ACPSOLUTIONS COM 1 866 811 8559 or 319 368 8195 E Mail commercialservice acpsolutions com Recognize Safety Symbols Words and Labels DANGER Immediate haz...

Page 4: ... high voltage area of the equipmentcompartment Sometypesof failures will leave a charge in these capacitors and the dischargecouldcauseareflexactionwhichcould makeyouinjureyourself 7 Always remember that in the area of the transformer there is HIGH VOLTAGE When the unitisoperatingkeepthisareaclearandfreeof anythingwhichcouldpossiblycauseanarcor ground etc 8 Do not for any reason defeat the interlo...

Page 5: ...lly designed to heat cook or dry food It is not designed for industrial or laboratory use 7 As with any equipment CLOSE SUPERVISION is necessary when used byCHILDREN 8 See door cleaning instructions 9 DO NOT heat baby bottles inoven 10 Baby food jars shall be open when heated and contents stirred or shaken before consumption in order to avoid burns 11 DO NOT operate this equipment if it has a dama...

Page 6: ...cian or pacemaker manufacturerabout effects of microwave energy on pacemaker 14 An authorized servicer MUST inspect equipment annually Record all inspections and repairs for future use SAVE THESE INSTRUCTIONS WARNING To avoid risk of fire in the oven cavity a DO NOT overcook food Carefully attend oven when paper plastic or other combustible materials are placed inside the oven to facilitate cookin...

Page 7: ...tivity USB Wifi Ethernet USB Wifi Ethernet USB Wifi Ethernet USB Wifi Ethernet Control Type 7in 178cm Capacitive 7in 178cm Capacitive 7in 178cm Capacitive 7in 178cm Capacitive Dimensions Cabinet cm in Width 356cm 14in 356cm 14in 356cm 14in 356cm 14in Height 577cm 22 75in 577cm 22 75in 577cm 22 75in 577cm 22 75in Depth includes handle 739cm 29 125in 739cm 29 125in 739cm 29 125in 739cm 29 125in Oven...

Page 8: ...ruct oven filters Allow access for filters to be cleaned H Install oven on level countertop surface I Outlet should be located so that plug is accessible when oven is in place Oven cord length is 60in 152cm STEP 3 Test Oven Operation J Ensure cooking plate is installed 1 Oven cavity must be cool to touch 2 Place shelf in oven with curve positioned towardthe the front of the oven This ensures prope...

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Page 14: ...n press the home button and proceed to program loading 6 Select Software Version 7 Insert the USB flash drive with the new firmware into the USB port 8 A box will appear in the lower portion of the screen Rev xxxx Available Begin Update 9 Press this box to begin firmware update The screen will now display Entering Standby Mode for a few seconds and then the screen will go blank Continue to wait 10...

Page 15: ...CARE AND CLEANING 13 ...

Page 16: ...OVEN CONSTRUCTION CAVITY TOP IMPINGEMENT COVER 4 SCREWS TO REMOVE COOKING PLATE MUST BE IN PLACE TO ALLOW AIR FLOW UNDER FOOD 14 ...

Page 17: ...RY COVER OUT OF POSITION USING SECURING TAB HELD IN WITH HIGH TEMP GASKETS LOOSEN 2 FRONT SCREWS AND REMOVE 2 BACK SECURING TABS MICA ANTENNA COVER REMOVAL AFTER IMPINGEMENT COVER REMOVED ANTENNAS From Inside Cavity NOTE 1000w ovens use one 15 ...

Page 18: ... POWER SUPPLY BOARD 24VDC PRIMARY SWITCH DOOR SECONDARY MONITOR SWITCH ASSEMBLY HINGE COOLING FANS TRANSFORMER 1 MECHANICAL LIMITER CAVITY THERMAL CUTOUT CAPILLARY STYLE MAGNETRON 1 COOLING FAN RUN CAPACITORS COOLING FAN PLUGS 16 ...

Page 19: ...OVEN CONSTRUCTION LEFT SIDE MAGNETRON 2 Not used on 1000w ovens CAPACITOR DIODE ANTENNA MOTOR MAIN CONTROL BOARD FUSE FUSE BLOCK COOLING FANS HINGE 17 ...

Page 20: ...MBER EXHAUST AIR DUCT AUTO TRANSFORMER SNUBBER COOLING FAN RELAY CONVECTION FAN MOTOR WIRING HARNESS PLUG INS TRIAC COOLING FAN CAVITY THERMAL CUTOUT MECHANICAL LIMITER RESET BUTTON HV SYSTEM FUSES 2 TRIACS 2 POWER RELAY TRANSFORMER LEFT Not used on 1000w ovens 18 LINE FILTERS ...

Page 21: ...RLOCK SWITCH TEST PLUGS FRONT OF OVEN MAIN CONTROL BOARD POWER SUPPLY BOARD 24VDC ANTENNA MOTOR GEARS CAPACITOR DIODE MAGNETRON 2 Not used on 1000w ovens RTD Resistive Thermal Device Aka TEMP SENSOR EXHAUST PLENUM STEAM VENT TUBE 19 ...

Page 22: ...evice aka Temp Sensor Temperature 70 F 23 9C 350 F 176 7 Approximately 1100Ω 1650Ω Fuses F1 BLN 250V 30A F3 F4 250V 12A CLOSED Continuity Magnetron DISCHARGE CAPACITORS Wires Removed Terminal to Terminal Both Terminals to Chassis 1Ω OPEN Motor Antenna Wires Removed Terminal to Terminal Approximately 12 000Ω 12KΩ Motor Convection Blower With Line Voltage Applied ST2 Connector Unplugged ST1 1 to ST1...

Page 23: ...lly OPEN Snubber Transformer Relay Wires Removed Terminal to Terminal Normally OPEN 09µf Switch Primary Use Test Plug By Main Board BU to RD Door Open BU to RD Door Closed Resistance Continuity OPEN NOTE When opening door the Primary Switch should ALWAYS activate first Switches Monitor Secondary Use Test Plug with Door Closed VT to BU Monitor Switch VT to OR Secondary Switch Resistance with Door C...

Page 24: ... AND PROPERLY REPLACE THE DOOR SWITCH ASSEMBLY 1 WITH THE DOOR OPEN SLIDE SWITCH BACK INTO SWITCH BRACKET AND TIGHTEN THE 5 16in 10mm NUT 2 USING AN OHMMETER WITH PROBES INSERTED INTO THE VT AND BU WIRES ON THE SECONDAYR MONITOR SWITCH TEST PLUG ADJUST MONITOR SWITCH TO OPERATE WHEN DOOR IS OPEN TO ONE 1 INCH AT THE TOP OF THE DOOR NOTE TIGHTENING ADJUSTMENT SCREW INCREASES THE TRIPPING POINT 1 in...

Page 25: ...ay 3 Enter in order 1 3 5 7 9 and the Service Mode is initiated If the PIN Code is not enabled it must be enabled in the User s Options With oven on press the blue menu icon at the bottom of the screen 1 2 Press the blue menu icon and the PIN Code prompt will display 3 Scroll screen to User Options and press it 4 Scroll screen to PIN Code it will say DISABLED underneath and press it 5 Press the ra...

Page 26: ...ll display Door Cycles Tube Hours Software Version Displays the version of software and firmware installed in the control Press and the following will display SW EE App Magnetron 1 Right Side System can be started and stopped by pressing the Start or Stop icon The current amperage being drawn by the HV system 5 12amps is considered normal Look for consistent reading with Magnetron 2 and Convection...

Page 27: ...be started by pressing the Start icon NOTE pressing Stop icon will not stop the antenna motors They continue to run until Service Mode is exited DOES NOT OPERATE ON MRX UNITS Antenna Motors draw very low amperage It is normal to have 0 amps displayed Service provider should visible inspect operation RTD Resistive Thermal Devices aka Temp Sensors Press and the current temperature sensed by the RTD ...

Page 28: ... Replace the Cavity Thermal Cutout NOTE Cutout may trip if subjected to sub freezing temperatures G2 Open Magnetron TCO Board Senses an Open Magnetron TCO Inspect Cooling Fans Operation and Airflow TCO s and Wiring H0 Zero Cross Failure No or Intermittent Voltage at J1 Connector on Main Control Board H2 Invalid System State Main Control Board H3 Invalid EEPROM FLASH Main Control Board I1 Current S...

Page 29: ...starting water temperature from the ending water temperature to obtain the temperature rise If the temperature rise meets or exceeds the nominal microwave energy rating found on the model serial tag the test is complete If the temperature rise fails to meet the minimum temperature rise test the line voltage to verify it is correct Then repeat steps 1 6 making sure to change the water If the temper...

Page 30: ...CONTROL BOARD WIRING 28 ...

Page 31: ...SCHEMATICS DIAGRAMS MRX51 ...

Page 32: ...MRX51 ...

Page 33: ...MRX51U ...

Page 34: ...MRX51U ...

Page 35: ...MRX52 ...

Page 36: ...MRX52 ...

Page 37: ...MRX523 ...

Page 38: ...MRX523 ...

Page 39: ... PLATE SHELF CP10 NON STICK LINER KIT TL10R sides door base PANINI GRILL PLATE RGR10 PADDLE PA10 or PA10R narrower LEG KIT LG10 ACCESSORY RACK TS10R STACKING CART SC10R BACK COVER PANEL BC10R 16400035 Rev 2 May 2018 37 ...

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