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Service

High Speed Combination Oven

Service Manual

This Manual covers QT High Speed Combination
Ovens  equipped  with  Touch  Screen  Controls.
Refer to individual  Service  Manuals  or  Technical
Sheets  for  information  on  other  QT  specific
models.

MXP22QTT

16400031

Rev.1

May 2017

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 MXP22QTT

Page 1: ...Refer to individual Service Manuals or Technical Sheets for information on other QT specific models MXP22QTT 16400031 Rev 1 May 2017 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: ... MXP22QTT w Electronic w Mechanical Limiter 15 21 Ceramic Tray and Replaceable Waveguides 22 Teflon Liner Instructions if equipped 23 Component Testing Procedures 24 25 Interlock Switch Service 26 Service Test Mode 27 29 Error Code List 30 Microwave Power Test 31 Wiring Diagrams Schematics 32 35 http services acpsolutions com SERVICE SUPPORT Find parts and information for your oven ...

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 1 866 426 2621 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: ...ating Frequency 2450 MHz Power Consumption 5700 Watts Microwave only 4200 Watts Convection fan 425 Watts 6200 RPM Radiant heater 3000 Watts Convection heater 2000 Watts Combination 5300 Watts Dimensions Cabinet in cm Width 25 0 63 5cm Height 20 25 51cm Depth includes bracket on back 25 625 65cm Oven Interior in cm useable space Width 16 0 41cm Height 7 75 20 cm Depth 15 0 38 cm Weight lbs kg Uncra...

Page 8: ... on level countertop surface Outlet should be located so that plug is accessible when oven is in place STEP 3 Install Rack Install oven rack 1 Oven cavity must be cool to touch 2 Place rack in oven with rear guard positioned toward the the back of the oven DO NOT cook food directly on floor of oven flow around oven cools electrical components With restricted air flow oven may not operate properly ...

Page 9: ...QUICK START REFERENCE GUIDE 7 ...

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Page 15: ...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 16: ... For optimum results heat oven to a maximum temp of 200 F 95 C turn oven OFF wait until fan stops 2 Remove rack pizza stone and other accessories from the cavity when it s cooled 3 Lift Bottom Element If element is warm use insulated gloves oven mitt or tongs to lift the element Remove baked on particles using a scraper 4 Spray Oven Interior Wear rubber gloves and safety glasses Spray oven door si...

Page 17: ... three top T 15 torx screws Door Remove the three rear T 15 torx screws slide panel to the rear and then down for removal Air Filters Right Outer Panel Top Outer Panel Torx T 15 Left Outer Panel Outercase Back AXP OVEN CONSTRUCTION 15 ...

Page 18: ...16 ...

Page 19: ...D Convection F2 Convection Motor F3 Magnetron 1 F4 Magnetron 2 Capacitor Diode Right Side Magnetron 1 Magnetron TCO s Magnetron 2 Capacitor Diode Left Side Switch Primary Triac TR1 Magnetron 1 Triac TR2 Magnetron 2 Triac TR3 Convection Heater Large Fuses F1 F5 F6 25 amp F1 Main Fuse F5 Convection Heater F6 Radiant Heater Note If Main Fuse F1 is blown Install F 1 Fuse Kit 17 ...

Page 20: ...Temp Sensor RTD Cooling Fans Convection Motor Catalytic Converter Located inside plenum Convection Motor Main Board Relay Monitor Board Power Relay Snubber Power Supply Board 24 VDC Temp Sensor RTD Radiant Thermocouple RTD Limiter Triac TR4 Radiant Heater Cooling Fans 18 ...

Page 21: ...chanical Limiter Cavity Insulation Insulation Retainer Power Cord Temp Sensor Gasket Per Ft RESETTABLE Mechanical Limiter HV Board Monitor Relay Board Cavity Steam Vent Cook Relay Power Supply Board Triac Radiant 19 ...

Page 22: ... Touch Control Panel Assembly 20 ...

Page 23: ...a Rivet Plastic Radiant Heater Multi Wave Spring Washer FlatWasher Lock Nut Note Requires 15 16 26mm Deep Socket See Detail Below Note Plastic Rivet cannot be reused Cam Antenna Motor Rivet Plastic Gear Assembly Alignment Arrows Antenna 21 ...

Page 24: ...perature sealer with installation instructions Replaceable Waveguide 14119054 LH 14119055 RH Waveguides are replaceable on AXP22 MXP22 models Waveguides are available as a right hand or left hand waveguide kit which includes new mounting nuts studs antenna and ceramic tray installed in waveguide with installationinstructions Ceramic Tray Waveguide Ceramic Tray CERAMIC TRAY REMOVEABLE WAVEGUIDE 22 ...

Page 25: ...ver Avoid using caustic cleaning products or those containing ammonia phosphates chlorine sodium or potassium hydroxide lye If needed fully remove grease first spray on towel then wipe down oven cavity Step 3 Identify the sheet cut to fit each cavity surface left right rear floor and door Peel the backing sheet from one edge by approximately 1 inch 3 cm and carefully apply to the appropriate area ...

Page 26: ...apacitor Discharge Capacitor Remove wires from capacitor terminals and connect ohmmeter set on highest resistance scale to terminals Also check between each terminal and capacitor case Between Terminals Meter should momentarily deflect towards zero then return to over 5 M If no deflection occurs or if continuous deflection occurs replace capacitor Terminal to Case Infinite resistance Snubber assem...

Page 27: ... Heater Temp Sensor Cavity Heater Temp Sensor Temperature Resistance 32 F 1000 350 F 1654 Relay Measure resistance from Terminal 0 to terminal 1 coil 0 1 2 4 6 8 Approximately 6 to 7 M Terminal 0 1 Line Voltage Terminal 2 6 Line Voltage Terminal 4 8 Line Voltage NOTE Analog meter is recommended for measurement NOTE If using a digital meter it must contain a battery of 6 volts minimum 0 1 This rela...

Page 28: ... INTERLOCK SWITCH SERVICE 26 ...

Page 29: ...ted 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 radial pad On and ensure it is lit 6 Enter 1 2 3 4 as PIN Code...

Page 30: ...ation Press and the following will 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...

Page 31: ...icon The current amperage being drawn by both the Cooling Fan Motors 1 3 amps is considered normal A failed Cooling Fan motor will likely result in a G2 Error Code Antenna Motors Both Antenna Motors can 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 Antenna Motors draw very low amperage It is normal t...

Page 32: ... bottom back right hand corner of unit If unable to reset Replace Mechanical Limiter NOTE Limiter may trip if subjected to sub freezing temperatures G2 Open Magnetron TCO Perform service test Magnetron 1 2 Board Senses an Open Magnetron TCO Inspect Cooling Fan Motor Operation and Airflow TCO s and Wiring H0 Zero Cross Failure No or Intermittent Voltage at J1 Connector on Main Control Board H2 Inva...

Page 33: ...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 34: ...SCHEMATICS DIAGRAMS P2004210M 32 ...

Page 35: ...P2004210M 33 ...

Page 36: ...P2004231M 34 ...

Page 37: ...P2004231M 35 ...

Page 38: ...NOTES ...

Page 39: ...NOTES 16400031 May 2017 ...

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