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RS2230003

Revision 2

December 1998

Service

Service Manual for
Amana

®

Menumaster

®

Compact Commercial
Microwave Oven

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

This Base Manual covers Commercial
Microwave Ovens with 120/230 V, 60 Hz.
Refer to individual Technical Sheet for
information on specific models.
This manual includes, but is not limited to
the following:

This manual replaces RS2230003 Rev. 1

CRC21T2
CRC18T2
CRC18T2SD
CRC12T2
CRC12T
CRC10T2
CRC10T
FSC18VP
FSC12VP
FSC10VP

1
2
3
...
»

Summary of Contents for CRC10T

Page 1: ...bility for property damage or personal injury for improper service procedures done by an unqualified person This Base Manual covers Commercial Microwave Ovens with 120 230 V 60 Hz RefertoindividualTechnicalSheetfor information on specific models This manual includes but is not limited to thefollowing ThismanualreplacesRS2230003Rev 1 CRC21T2 CRC18T2 CRC18T2SD CRC12T2 CRC12T CRC10T2 CRC10T FSC18VP F...

Page 2: ...WARNING Precautions to be observed before and during servicing to avoid possible exposure to excessive microwave energy A Do not operate or allow oven to be operated with the door open B Make the following safety checks on all ovens to be serviced before activating the magnetron or other microwave source and make repairs as necessary Interlock operation Proper door closing Seal and sealing surface...

Page 3: ...vating Preprogrammed Pad 17 Reactivating Preprogrammed Pad 17 Deactivating Control Panel 17 Reactivating Control Panel 17 User Options 18 Component Testing Procedures 19 Microwave Power Test 22 Radiation Leakage Testing Equipment 23 Procedure for Measuring Radiation Leakage 23 Measurement with Outer Case Removed 23 Measurement with a Fully Assembled Oven 23 Record Keeping and Notification After Me...

Page 4: ... damage from improper service procedures If prefroming service on your own product assume responsibility for any personal injury or property damage which may result To locate an authorized servicer please consult your telephone book or the dealer from whom you purchased this product For further assistance please contact CONSUMER AFFAIRS DEPT OR 1 319 622 5511 AMANA REFRIGERATION INC CALL and ask f...

Page 5: ...reason for this action at any time nor will it be condoned by Amana Important Safety Information 9 Microwave oven should never be operated with Any components removed and or bypassed Any of the safety interlocks are found to be defective Any of the seal surfaces are defective missing or damaged 10 To ensure that unit does not emit excessive microwave leakage and to meet Department of Health and Hu...

Page 6: ...use metal utensils in oven 10 Never use paper plastic or other combustible materials that are not intended for cooking 11 When cooking with paper plastic or other combustible materials follow manufacturer s recommendations on product use 12 Do not use paper towels which contain nylonor other synthetic fibers Heated synthetics could melt and cause paper to ignite 13 Do not heat sealed containers or...

Page 7: ...is not working properly or if it has been damaged or dropped 9 This equipment including power cord must be serviced ONLY by qualified service personnel Special tools are required to service equipment Contact nearest authorized service facility for examination repair or adjustment 10 DO NOT cover or block filter or other openings on equipment 11 DO NOT store this equipment outdoors DO NOT use this ...

Page 8: ...emely important that they be grounded before handling Auto Transformer Auto transformer in this unit provides a voltage of 120 208 or 230 VAC Transformer High Voltage High voltage transformer is used in this unit which supplies high voltage A C for operation of the magnetron tube High Voltage Capacitor Doubles the A C output voltage from the high voltage transformer High Voltage Diode Rectifier Is...

Page 9: ...te electrical rating as shown in the drawings When an oven is on a circuit with other equipment an increase in cooking times may be required and fuses can be blown Unpacking Oven Remove packing and printed material from oven cavity Inspect oven for damage such as dents in door or inside oven cavity Report any dents or breakage to source of purchase immediately Do not attempt to use oven if damaged...

Page 10: ...microwave oven bottom Do not use water pressure type cleaning systems Cleaning Splatter Shield Splatter shield keeps top of microwave oven cavity and antenna from becoming soiled Clean soil from shield with damp cloth or clean with mild detergent and water Remove splatter shield for easy cleaning 1 Unplug oven before removing splatter shield to stop antenna from rotating 2 Place fingers behind shi...

Page 11: ...r is located below oven door Clean air intake filter weekly for proper air flow Wash filter in hot water and mild detergent Do not use oven without filter in place Remove filter to clean Method 1 1 Open oven door and lift front of oven by pushing up on front of oven cavity ceiling 2 Slide filter down and out of oven frame Pull down on corners of filter 3 Reverse procedure to reinstall Method 2 1 S...

Page 12: ... Use to begin heating with preprogrammed times and power levels or to enter times for Manual Time Entry cooking POWER LEVEL Use to select power level Oven can heat at full or reduced power If oven power level is set to 0 oven does not heat for programmed time Adjust power in increments of 10 If no power level is selected oven operates at 100 power Used to program or change user options START Use t...

Page 13: ...evel digit or blank space shows above COOK LEVEL in display Blank space indicates full power Pb or Pd Indicates programming mode and current menu See Programming section of manual for programming procedure bP1 Indicates menu b in programming mode and stage 1 The smaller 1 indicates pad 1 is being programmed OP 11 Indicates programming user options mode See User Options section of manual for progra...

Page 14: ...s START pad to save new heating time and power level in oven memory 9 Press RESET pad or close oven door to exit programming mode Programming Multiple Heating Stages 1 Open oven door 2 Press pad 1 for approximately 5 seconds 3 Press MENU b d pad to select preprogrammed menu if necessary 4 Press desired number pad 5 Press number pads to enter desired cooking time 6 Press POWER LEVEL pad if power le...

Page 15: ...ming elapses Power up Display After equipment is plugged in display shows 4 large dashes and 1 small dash Open and close oven door to clear display and activate pads Interrupting Operation Open oven door to interrupt operation Oven fan continues to operate Close door and press START pad to resume oven operation Press STOP RESET pad to interrupt operation Display continues to show countdown time Pr...

Page 16: ...LEVEL and current power level if other than 100 percent power 5 Press number pad to enter desired power level For example pressing 2 pad is 20 percent power 6 Press START pad Oven operates and time counts down Display shows heating time POWER COOK LEVEL Display shows POWER only when microwave energy is present If power level other than 100 percent power was programmed display shows COOK LEVEL and ...

Page 17: ...inishing programming sequence oven exits programming mode 2 Press and hold pad 1 for approximately 5 seconds After 5 seconds signal sounds Display shows Pb or Pd indicating b or d menu 3 Press desired number pad Display shows heating time COOK LEVEL and power level if other than 100 percent power 4 Press MENU b d pad dddd and pad number show in display 5 Press START pad to save in oven memory To r...

Page 18: ... 41 Prevents signal when pad is pressed Allows signal when pad is pressed 5 OP 50 OP 51 Allows oven to resume heating time countdown after door is opened during cycle Cancels heating time count down after door is opened during cycle 6 OP 60 OP 61 Allows use of power levels Prevents use of power levels 7 OP 70 OP 71 OP 72 OP 73 Eliminates end of heating cycle signal Sets end of heating cycle signal...

Page 19: ...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 MΩ IF no deflection occurs or if continuous deflection occurs replace capacitor Terminal to Case Infinite resistance Snubber Assembly Disconnect wires to snubber Measure resistance across terminal...

Page 20: ...ew on transformer Terminal 4 to any other terminal Red 1 2 Gray Less than 1 Ω Less than 1 Ω Less than 1 Ω 40 Ω Infinite resistance should be indicated if not replace transformer 4 2 1 6 5 Terminal 1 120 V Terminal 2 Common Transformer 4 1 2 5 6 CRC10T2 CRC10T FSC10VP Discharge Capacitor Remove all wires from terminals and measure resistance from Terminal 1 to 2 Terminal 5 to 6 Terminal 4 to Ground...

Page 21: ...ondition D to K 0 volts Standby and Cook Conditions F to H 75 volts AC approximately Cook Condition J1 connector Line voltage All Condition Line Voltage 0 VAC Cook Conditons Line Voltage All Conditons Continuity test Door closed continuity Door open open circuit Touch Panel Assembly Continuity is indicated as 100 Ω and below 1 2 3 4 5 6 7 8 9 Split 10 Pad 1 2 3 4 5 6 7 8 9 Time Entry Power Level M...

Page 22: ...tion Additional power tests should be made if temperature rise appears marginal NOTE Low line voltage may cause lower power output temperature rise NOTE Always perform 3 tests for accuracy Change water after each test Temperature Chart ONE MINUTE THREE SECONDS run time chart for units less than 1550 watts cooking power T Cooking T Cooking C Power Output C Power Output 7 490 15 1050 8 560 16 1120 9...

Page 23: ...ment must be strictly observed In addition the leakage reading must be recorded on the service repair ticket while at the customer s location Equipment Electromagnetic radiation monitor 600 cc glass beaker Procedure For Measuring Radiation Leakage Note before measuring Do not exceed meter full scale deflection Leak monitor should initially be set to the highest scale To prevent false readings the ...

Page 24: ...ys click Open fuse Open top magnetron TCO 1 2 3 NO Apply power with door closed Open bottom magnetron TCO Inoperative interlock switch assembly logic Inoperative control board Broken or improper wire connections 4 5 6 Proceed to Standby condition YES Display ...

Page 25: ... Oven light is on Stirrer motor operates Inoperative light bulb Inoperative light socket Inoperative auto transformer Broken or improper wire connections 1 2 3 4 Inoperative stirrer motor Binding gears some models Inoperative auto transformer Broken or improper wire connections 1 2 3 4 Inoperative interlock switch assembly logic Inoperative control board Broken or improper wire connections 1 2 3 N...

Page 26: ... inoperative diode One inoperative capacitor One inoperative magnetron Broken or improper wire connection 1 2 3 4 No heat Inoperative triac Inoperative diodes Inoperative capacitors Inoperative control board 1 2 3 5 6 Inoperative high voltage transformer 4 Oven is operating properly NOTE Shut down after cook cycle door closed 25 seconds Shut down door open approximately 5 minutes After shut down d...

Page 27: ...4 Remove door from unit and lay door on padded surface Inner Door Window Disassembly 1 Open oven door 2 Loosen screws on hingeside 3 4 turns Do not remove screws 3 Beginning at the bottom carefully insert 1 putty knife between inner and outer door Pry up on inner door to release tabs 2 clips per side Work in a clockwise direction to release all tabs see illustration below 1 2 3 4 Tabs Loosen screw...

Page 28: ...on the hinge side of the door toward the oven cavity and tighten 4 door hinge bolts 7 Remove shim on hinge side of door only 8 Open and close door observing switch activation Door is properly adjusted when primary and secondary switch plungers are fully depressed with the door closed 9 If switch requires adjustment Open oven door Loosen switch mounting screws Position interlock switch assembly all...

Page 29: ...n oven cavity where new RTV will make contact 5 Install tray and apply RTV to all edges of the tray remove excess RTV NOTE Allow RTV to set for 1 hour before using Stirrer Motor some models top 1 See Component Location Figure 2 for location 2 Unplug power cord from power source 3 Remove outer case 4 Remove cotter pin from spur gear 5 Remove pop rivets and remove stirrer motor 6 Reassemble in rever...

Page 30: ...e cutout in reverse order Triac 1 See Component Location Figure 2 for location 2 Unplug power cord from power source 3 Remove outer case cover 4 Remove insulator covering triac 5 Remove wires from terminals of triac 6 Remove screws securing triac to chassis 7 Reassemble triac in reverse order Diodes 1 See Component Location Figure 1 for location 2 Unplug power cord from power source 3 Remove outer...

Page 31: ...ion 2 Pull blade off shaft 3 When reinstalling blade push blade on shaft and rotate to insure clearance between fan blade and wire terminals Auto Transformer 1 See Component Location Figure 2 for location 2 Unplug power cord from power source 3 Remove outer case and back panel 4 Remove screws securing auto transformer to chassis 5 Remove wire connections from auto transformer 6 Reassemble auto tra...

Page 32: ... To avoid electrical shock which can cause severe personal injury or death unplug power cord or open circuit breaker to oven before replacing light bulb After replacing light bulb restore power CAUTION To avoid personal injury or property damage observe the following Allow oven and light bulb to cool Wear gloves when replacing light bulb Tools Needed Protective gloves Screwdriver 25 watt 120 volt ...

Page 33: ...03 Rev 1 Disassembly WARNING To avoid the risk of electrical shock personal injury or death disconnect power to oven and discharge capacitors before following any disassembly procedure Component Location Figure 1 ...

Page 34: ...S2230003 Rev 1 34 Disassembly WARNING To avoid the risk of electrical shock personal injury or death disconnect power to oven and discharge capacitors before following any disassembly procedure Figure 2 ...

Page 35: ...5 RS2230003 Rev 1 Disassembly WARNING To avoid the risk of electrical shock personal injury or death disconnect power to oven and discharge capacitors before following any disassembly procedure Figure 3 ...

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