Autoclave - Midmark - M11 - Manual de Servicio y Partes

FOR USE BY MIDMARK TRAINED TECHNICIANS ONLY

Service andParts Manual

SF-1854 Part No. 004-0453-00 Rev. D (1/01/07)

UltraClaveAutomatic Sterilizers

Model Numbers:

M9M9DM11M11D

-020 thru -022

-020 & -022

-020 thru -022

-020 & -022

Serial Number Prefixes:RN, RP, RR, V

RW, RX, V

RS, RT, RV, V

RY, RZ, V

NLY

tinued........ B-39........ B-42........ B-46........ B-50........ B-53

........ C-2

........ C-3ir ..... C-4

MS

......... D-2

.........D-4

......... D-3

.........D-4

........ D-2

........ D-4

........ D-3

........ D-4

TS LISTS........ E-2........ E-3........ E-2........ E-3FOR USE BY MIDMARK TRAINED TECHNICIANS O

Tabl

e O

f Con

tent

sGENERAL INFORMATION

Symbols .................................... iOrdering Parts .......................... iModel / Serial Number

Location .................................. iWeights, Dimensions,

Electrical Specifications ....... iiModel Identification /

Compliance Chart .................. iiiCycle Parameters ..................... ivSpecial Tools ............................ ivWarranty Information ............... v

OPERATION &TROUBLESHOOTING

Error Codes .............................. A-2Power-Up Mode ........................ A-18Fill Mode ................................... A-20Heat-Up Mode ........................... A-22Sterilization Mode .................... A-24Vent Mode ................................. A-26Door Motor System .................. A-28Drying Mode ............................. A-30Fan System ............................... A-32PC-Based Diagnostic

Program .................................. A-34

TESTING & REPAIRChecking for

Pressure Leaks ...................... B-2Using a Pressure Gauge ......... B-3Fuses......................................... B-4Service Diagnostics ................. B-5Air Valve .................................... B-12Fill & Vent Valves ...................... B-15Pressure Relief Valve ............... B-18Heating Element ....................... B-20Tempreature Sensor ................ B-23Water Level Sensor .................. B-27High-Limit Thermostats ........... B-31Door Switch .............................. B-34Touch Pad & Display Panel ..... B-37

TESTING & REPAIR - conDoor Motor System ..........Fan & Fan Thermostat .....Main PC Board .................Printer (optional) ...............Adjusting the Dry Time ....

ACCESS PROCEDURESRemoving & Installing:

Covers / Panels ................Tray Plate / Rack ..............Draining / Filling Reservo

WIRING & FLOW DIAGRAM9 (-020 / -021 / -022):

Wiring Diagram ....................Flow Diagram ......................

M9D (-020 / -022):Wiring Diagram ....................Flow Diagram ......................

M11 (-020 / -021 / -022):Wiring Diagram ....................Flow Diagram ......................

M11D (-020 / -022):Wiring Diagram ....................Flow Diagram ......................

EXPLODED VIEWS / PARM9 (-020 / -021 / -022) .......M9D (-020 / -022): .............M11 (-020 / -021 / -022) .....M11D (-020 / -022): ...........

Gen

eral

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BSe

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i Midmark Corporation 2004 SF-1854

General InformationSymbols

CautionIndicates a potentially hazardous situationwhich could result in injury if not avoided.

Equipment AlertIndicates a potentially hazardous situationwhich could result in equipment damage if not avoided.

NoteAmplifies a procedure, practice, or condition.

Indicates that the component the check mark appearsbeside should be tested before replacing it.In Section A, test the components in the order indicated.(ex. 1st then, 2nd )

Refer to Section B for component testing procedures.

These symbols are used throughout this manual to represent theoperational status of functions and components.

Indicates the function / component is working properly.No action required.

Indicates the function / component is working,but a problem exists.

Indicates the function / component is not working at all.

Model / Serial Number Location

Gen

eral

Info

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33333 33333 33333

Ordering Parts

The following information is required when ordering parts: Serial number & model number Part number for desired part.

[Refer to Section E: Exploded Views / Parts Lists]

Non-warranty parts orders may be faxed to Midmark usingthe Fax Order Form in the back of this manual.

For warranty parts orders, call Midmark's Technical ServiceDepartment with the required information.Hours: 8:00 am until 5:00 pm EST [Monday - Friday]Phone: 1-(800)-Midmark

MA616300i

Serial Number

Model / Serial Number

ii

General Information

Midmark Corporation 2004 SF-1854

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Weights, Dimensions, Electrical Specifications

Dimensions [Refer to illustration]:Front Height (A) ................................. 15.8 in. (40.1 cm)Width (B) ............................................ 15.3 in. (38.9 cm)Depth w/plug (C) ................................ 20.1 in. (51 cm)Back Height (D) ................................. 15.3 in. (38.9 cm)

Chamber Size: ...................................... Diameter: 9 in. (22.9 cm) Depth: 15 in. (38.1 cm)

Shipping Carton:(Length x Width x Height) .................. 24.2 in. x 20.5 in. x 21 in. (61.4 cm x 52 cm x 53.3 cm)

Weight:Shipping Weight ................................. 81 lbs (36.7 kg)w/reservoir empty .............................. 73 lbs (33.1 kg)w/reservoir full ................................... 82 lbs (37 kg)

Reservoir Capacity: ............................ Approx. 1.1 gallon (4.1 liters) at FULL markPressure Relief Valve:

opens at approximately: .................... 40 psi (275kPa)

Electrical Requirements: .................... [See Model Identification / Compliance Chart]

Fuses (on main PC board):115 VAC models

F1 ....................................................... 0.250 amp, 250 V, Slo-Blo, 1/4" x 1-1/4"F2 ....................................................... 15 amp, 250 V, Fast-Acting, 1/4" x 1-1/4"

230 VAC models:F1 ....................................................... 0.125 amp, 250 V, Slo-Blo, 5mm x 20mmF2 ....................................................... 8 amp, 250 V, Fast-Acting, 5mm x 20mm

Power Consumption:115 VAC models ................................ 1425 watts, 12 amps @ 120 VAC230 VAC models ................................ 1500 watts, 7 amps @ 240 VAC

M9 / M9D Model Information

Dimensions [Refer to illustration]:Front Height (A) ................................. 17.8 in. (45.2 cm)Width (B) ............................................ 17.75 in. (45.2 cm)Depth w/plug (C) ................................ 22.75 in. (57.8 cm)Back Height (D) ................................. 17.6 in. (44.2 cm)

Chamber Size: ...................................... Diameter: 11 in. (27.9 cm) Depth: 18 in. (45.7 cm)

Shipping Carton:(Length x Width x Height) .................. 26.2 in. x 21.5 in. x 21 in. (66 cm x 54.6 cm x 53.3 cm)

Weight:Shipping Weight ................................. 131 lbs (59.4 kg)w/reservoir empty .............................. 99 lbs (44.9 kg)w/reservoir full ................................... 111 lbs (50.4 kg)

Reservoir Capacity: ............................ Approx. 1.4 gallon (5.3 liters) at FULL markPressure Relief Valve:

opens at approximately: .................... 40 psi (275kPa)

Electrical Requirements: .................... [See Model Identification / Compliance Chart]Fuses (on main PC board):115 VAC models

F1 ....................................................... 0.250 amp, 250 V, Slo-Blo, 1/4" x 1-1/4"F2 ....................................................... 15 amp, 250 V, Fast-Acting, 1/4" x 1-1/4"

230 VAC models:F1 ....................................................... 0.125 amp, 250 V, Slo-Blo, 5mm x 20mmF2 ....................................................... 8 amp, 250 V, Fast-Acting, 5mm x 20mm

Power Consumption:115 VAC models ................................ 1425 watts, 12 amps @ 120 VAC230 VAC models ................................ 1500 watts, 7 amps @ 240 VAC

ATTENTIONA seperate (dedicated) electrical circuit isrecommended for all models (M9/D & M11/D).Do not connect to a circuit with other devices,unless the circuit is rated for the additional load.

M11 / M11D Model Information

Rev. 7/05

iii Midmark Corporation 2004 SF-1854

General InformationModel Identification / Compliance Chart - M9/D & M11/D

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ASC/NAC,2.22C

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spmA selcyC )zH(

020-9M evalcartlU9MkramdiM)CAV511( NR & V x x x x x 511 51 06/05

120-9M evalcartlU9MkramdiM)CAV032( PR & V x x x x x 032 01 06/05

220-9M evalcartlU9MrettiR)CAV511( RR & V x x x x x 511 51 06/05

120-D9M evalcartlUD9MkramdiM)CAV511( WR & V x x x x x 511 51 06/05

220-D9M evalcartlUD9MkramdiM)CAV032( XR & V x x x x x 032 01 06/05

020-11M evalcartlU11MkramdiM)CAV511( SR & V x x x x x 511 21 06/05

120-11M evalcartlU11MkramdiM)CAV032( TR & V x x x x x 032 5.6 06/05

220-11M evalcartlU11MrettiR)CAV511( VR & V x x x x x 511 21 06/05

120-D11M evalcartlUD11MkramdiM)CAV511( YR & V x x x x x 511 21 06/05

220-D11M evalcartlUD11MkramdiM)CAV032( ZR & V x x x x x 032 5.6 06/05

iv

General Information


Cycle ParametersThis table shows the temperature / pressure / time parameters for the pre-set cycles.

Special ToolsThis table lists all special tools needed to diagnose and repair the sterilizer.

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retemomrehTlatigiD elbaliavayllaicremmoC epytyna erutarepmetrebmahcyfirevoT

eguaGerusserPssenraHtseT noitaroproCkramdiM 00-2730-200 elcycgniruderusserprebmahckcehcoT

* Dry Mode Time can be adjusted from 0 to 60 minutes

v Midmark Corporation 2004 SF-1854

General InformationWarranty InformationSCOPE OF WARRANTYMidmark Corporation (Midmark) warrants to the original purchaser its new Alternate Careproducts and components (except for components not warranted under Exclusions) manufac-tured by Midmark to be free from defects in material and workmanship under normal use andservice. Midmarks obligation under this warranty is limited to the repair or replacement, atMidmarks option, of the parts or the products the defects of which are reported to Midmarkwithin the applicable warranty period and which, upon examination by Midmark, prove to bedefective.APPLICABLE WARRANTY PERIODThe applicable warranty period, measured from the date of delivery to the original user, shall beone (1) year for all warranted products and components.EXCLUSIONSThis warranty does not cover and Midmark shall not be liable for the following: (1) repairs andreplacements because of misuse, abuse, negligence, alteration, accident, freight damage, ortampering; (2) products which are not installed, used, and properly cleaned as required in theMidmark Installation and or Installation / Operation Manual for this applicable product. (3)products considered to be of a consumable nature; (4) accessories or parts not manufacturedby Midmark; (5) charges by anyone for adjustments, repairs, replacement parts, installation, orother work performed upon or in connection with such products which is not expresslyauthorized in writing in advance by Midmark.EXCLUSIVE REMEDYMidmarks only obligation under this warranty is the repair or replacement of defective parts.Midmark shall not be liable for any direct, special, indirect, incidental, exemplary, or consequential damages or delay, including, but not limited to, damages for loss of profits or loss of use.NO AUTHORIZATIONNo person or firm is authorized to create for Midmark any other obligation or liability inconnection with the products.

THIS WARRANTY IS MIDMARKS ONLY WARRANTY AND IS IN LIEU OF ALL OTHERWARRANTIES, EXPRESS OR IMPLIED. MIDMARK MAKES NO IMPLIED WARRANTIES OFANY KIND INCLUDING ANY WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANYPARTICULAR PURPOSE. THIS WARRANTY IS LIMITED TO THE REPAIR OR REPLACEMENT OF DEFECTIVE PARTS.

SF-1487 REV. A1

Additional InformationFailure to follow the guidelines listed below will void thewarranty and/or render the table unsafe for use.

If a malfunction is detected, do not use the table untilnecessary repairs are made.

Do not attempt to disassemble table, replacecomponents, or perform adjustments unless you area Midmark authorized service technician.

Do not use another manufacturer's parts to replacemalfunctioning components. Use only Midmarkreplacement parts

A-1

roubleshooting

Corporation 2004 SF-1854

em Page / Troubleshooting.............. A-2nal) ................................... A-16ode .................................... A-18........................................... A-20de ...................................... A-22Mode ................................. A-24........................................... A-26

ystem .............................. A-28......................................... A-30

.......................................... A-32iagnostic Program ............. A-34Operation & T

Models:Serial Numbers:

Midmark

Sect

ion

AMode / SystError CodesPrinter (optioPower Up MFill Mode ....Heat-Up MoSterilization Vent Mode .Door Motor SDrying ModeFan SystemPC-Based D

Operation &Troubleshooting

A-2

Operation & Troubleshooting



Error Codes

Error CodesIf an electronic malfunction is detected during a cycle, a numeric error code will appear on thedisplay panel. Each digit in the error code provides information about the problem that occurred.

Example: First Digit = Where?The first digit indicates the componentor system where the problem occurred.(example: 3 = Door Switch)Second Digit = What?The second digit indicates whatproblem or symptom was detected.(example: 8 = Open)Third Digit = When?The third digit indicates whenthe problem was detected.(example: 2 = Fill Mode)

The table below cross-references the numeric error code with the Component, Problem, and Mode.

tigiDtsriF)tnenopmoC(

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0 metsySlareneG= 0 )desuton( 0 edoMpU-rewoP=1 nottuBpotS= 1 ssoLrewoP= 1 elcyCtceleS=

2 rosneSleveLretaW= 2 desolC= 2 edoMlliF=

3 hctiwSrooD= 3 woL= 3 edoMpU-taeH=

4 )desuton( 4 hgiH= 4 edoMgniziliretS=5 rosneSerutarepmeT= 5 )desuton(= 5 tneV=6 rosneSerusserP= 6 erawdraH= 6= "nepOoTrooD"

7 )desuton( 7 timiLrevO= 7 yrD=8 )desuton( 8 nepO= 8 )desuton(9 tatsomrehTtimiLhgiH= 9 )desuton( 9 )desuton(

Troubleshooting[Error Codes]Error Codes PageC010: (General System) ................................... A-3C060: (General System) ................................... A-3C099: (General System) ................................... A-4C100 Series: (Stop Button Codes) ................. A-5C200 Series: (Water Fill Codes) .................... A-6C300 Series (Door Switch Codes) ................. A-7C500 Series: (Temperature Codes) ............... A-8C600 Series: (Pressure Codes) ..................... A-9C900 Series: (Hi-Limit Thermostat Codes) .... A-10

ALL

A-3




Refer To: PageOperation & Troubleshooting ................ A-1Component Testing / Repair ................. B-1Access Procedures .............................. C-1Wiring Diagrams ................................... D-1Exploded Views / Part Numbers ........... E-1

Check supply voltage.(A dedicated circuit is recommended)

1st33333

Error Codes: C010 / C060Problem: Power interruption

Error CodesALL

A-4





Ignore this error code.(Push STOP to restart)

Error Code: C099Problem: None. [This code was generated during testing at the factory]

Error Codes ALL

A-5





1st33333Explain proper operation to users.(Push STOP button to restart)

Error Codes: C100 Series (all)C102 C103 C104 C105 C106

Problem: STOP button was pressed during a cycle.

Error CodesALL

A-6





1st33333Low water in reservoir?(Add water if necessary)

3rd33333Water Level Sensor

4th33333Fill ValveCheck all wire connections.Test the valve if necessary.

6th33333Main PC Board

Error Codes: C200 Series (all)C232

Problem: Water level sensor did not detect a full chamberwithin 5 minutes of starting the cycle.

Error Codes

5th33333Air Valve

Chamber FilterRemove filter & clean usingSpeedClean and a brush.

2nd33333

ALL

A-7





Door Latch Mechanism(Adjust latch if necessary)

Main PC Board

Door Motor / Switch

Door Switch

Error Codes: C300 Series (all)C326 C382 C383 C384

Problem: PC board detected open door switch contacts during a cycle. -or-Door switch contacts remained closed after door motor shut off.

C326 If door is open...

1st Door Switch2nd Main PC Board

If door is closed...1st Door Latch Mechanism2nd Door Motor / Switch

3333333333

3333333333

C382 / C383 / C384 If door is open...

1st Improper operation.(Do not open door during cycle)

If door is closed...1st Door Switch

33333

33333

Error CodesALL

A-8





Is sterilizer level?Adjust leveling feet as necessary.

1st33333

4th33333Temperature Sensor5th33333Water Level Sensor

6th33333Heating Element

7th33333Main PC Board

Error Codes: C500 Series (all)C533 C534 C544 C560 C561 C562 C563 C564 C567 C570 C571 C572 C573 C574 C575 C577

Problem: Chamber temperature reading was not within the acceptable range for the current cycle.

Attention:C560 & C570 indicate a powerinterruption occurred after an error codewas displayed.

When these errors appear, always checkthe five previous error codes.[Refer to Section B: Service Diagnostics]

Error Codes

Chamber FilterRemove filter & clean usingSpeedClean and a brush.

3rd33333

2nd33333Check for pressure leaks.Refer to Section B for checkpoints.

ALL

A-9




Error Codes


Error Codes: C600 Series (all)C633 C645 C647 C660 C661 C662 C663 C664 C665 C667 C670 C671 C672 C673 C674 C675 C677

Problem: Chamber pressure reading was not within the acceptable range for the current cycle.

ALL

Hardware Errors(C661 / C662 / C663 / C664 / C665 / C667)

1st Main PC Board33333

High Pressure Errors(C645 / C647 / C671 / C675 / C677)

1st Vent Valve2nd Chamber Filters3rd Main PC Board

(C672 / C673 / C674)1st Air Valve2nd Main PC Board3333333333

333333333333333

Check for pressure leaks.Refer to Section B for checkpoints.

Main PC Board

Chamber FiltersRemove both filters & clean usingSpeedClean and a brush.

Water Level Sensor

Heating Element

Temperature Sensor

Vent Valve

Air Valve

Chamber Filters

Low Pressure Error(C633)

1st Pressure Leaks2nd Water Level Sensor3rd Heating Element4th Main PC Board33333333333333333333

Attention:C660 & C670 indicate a power interruptionoccurred after an error code was displayed.

When these errors appear, always check thefive previous error codes.[Refer to Section B: Service Diagnostics]

Rev. 10/04

A-10





Error Codes: C900 Series (all)C980 C981 C982 C983 C984 C985 C987

Problem: High-limit thermostat contacts opened during cycle.

1st33333High-Limit Thermostats

2nd33333Main PC BoardAttention:C980 indicates a power interruptionoccurred after an error code was displayed.

When this error appears, always checkthe five previous error codes.[Refer to Section B: Service Diagnostics]

Error Codes ALL

A-11




Troubleshooting


Check supply voltage.(Power cord connection, facility circuit breaker, etc.)

1st33333

3rd33333Fuses

2nd33333Loose / Damaged Wire Connections(Ribbon connector between Main PC Board / Display Panel)

5th33333Main PC Board4th33333Display Panel

Power-Up ModeProblem: Display panel is blank.

Touch pad does not work.

ALL

A-12




1st33333Loose / Damaged Wire Connections(Ribbon connector between Display PC Board / Display Panel)

* {} ^^ /\|``~ ~~*+^*


Troubleshooting

Power-Up ModeProblem: "Foreign" characters appear on the display panel.

Touch pad works properly. ["Beeps" continuously]

ALL

A-13





Troubleshooting

Is the sterlizer overloaded?Large loads or heavy linen packs mayprevent strips from changing.

2nd33333

Type / condition of indicator stripsThis unit requires test strips rated for:Gravity Displacement Steam Sterilizers

Test strips must be stored in a cool, dry location.Failure to do so will result in faulty readings.

(Follow all instructions provided with test strips)

1st33333

3rd33333Are the correct trays being used?Some trays may prevent proper air flow.Be sure trays are designed for this sterilizer.

Sterilization ModeProblem: Biological test strips indicate items are not sterile.

[No error code appears on display]

ALL

A-14




Troubleshooting


Heating Element 7th33333High-Limit Thermostat(s) 6th33333

Vent Valve 5th33333Chamber FilterRemove filter & clean usingSpeedClean and a brush.

3rd33333

Is sterilizer level?Adjust leveling feet as necessary.

2nd33333

Improper OperationSterilizer may be overloaded.Door must remain partially open during Dry Mode. (If door is closed, or fully opened, items may not dry properly)

1st33333

Temperature Probe 8th33333

Drying ModeProblem: Instruments are still wet after Drying Mode. -or-

Packs are burning during Dry Mode.

Adjust Drying TimeRefer to Section B: Adjusting the Dry Time

4th33333

ALL

A-15




Troubleshooting


Fan Thermostat 1st33333

Fan 2nd33333Main PC Board 3rd33333

Fan SystemProblem: Fan does not run when temperature exceeds 130F. -or-

Fan continues to run after temperature drops below 100F.

ALL

A-16




Troubleshooting


2nd33333Main PC Board

Printer (optional)Problem: Printer does not generate a print-out.

1st33333PrinterCheck the following: Printer paper Ink cartridge Ribbon harness connections

If necessary, perform Printer Test (Section B).

Optional on all models

A-17




Troubleshooting

This page intentionally left blank

A-18




Power-Up ModeThis illustration shows the components that affect, or are monitored during all cycle modes.Refer to the following page for a detailed description of the Power-Up Mode.

Troubleshooting[Power-Up Mode]Problem: PageError Codes:

C010 ................................................ A-3C060 ................................................ A-3C099 ................................................ A-4

Display panel is blank, &touch pad does not work .................. A-11

Display panel shows foreign characters("beeps" continuously) ...................... A-12

Power-Up Mode

High-Limit Thermostats[Line VAC]

Line VAC

Primary Fuses (2)

Door Switch[Line VAC]

ALL

A-19




Base Up / Down

Power-Up Mode

Primary FusesWith the table's power cord properly connected, facility supplyvoltage is supplied to the Main PC Board thru the two primary fuses.

If either fuse is faulty, the sterilizer will have no power.

High-Limit ThermostatsWhen power is supplied to the Main PC Board, current continuouslyflows thru the two (normally closed) High-Limit Thermostats.This circuit powers all line voltage components (except Fan System).If either thermostat opens for any reason (overheat or malfunction),the sterilizer will shut down until unit cools, or thermostat is replaced.

Door SwitchOnce a cycle is initiated, the Main PC Board continuously monitorsthe status of the Door Switch.

If an open door is detected, the cycle will not start. If the door switchopens during a cycle, the cycle will be terminated and thecorresponding error code will appear in the display.

Each time power is reconnected, the display panel will show:

SoftwareVersion

ModelNumber

Total cycles runon the sterilizer

Power-Up ModeALL

A-20




Troubleshooting[Fill Mode]Error Codes Page

C102 ................................................ A-5C232 ................................................ A-6C382 ................................................ A-7C562 ................................................ A-8C572 ................................................ A-8C662 ................................................ A-9C672 ................................................ A-9C982 ................................................ A-10

Fill Mode

Fill ModeThis illustration calls out the components that are energized / monitored during the Fill Mode.Refer to the following page for a detailed description of the Fill Mode.

[Refer to to Main Power System for components that are continually monitored during all modes]

Air Valve - open[Line VAC]

Vent Valve - closed[Line VAC]

Fill Valve - open[Line VAC]Water Level Sensor

[5 VDC]

ALL

A-21




Base Up / Down

Fill Mode

Fill ModeDuring the Fill Mode, water flows from thereservoir, thru the fill valve into the chamber.

[All electrical current is supplied thru the twohigh-limit thermostats (on bottom of chamber).Refer to 'Power-Up Mode', for further detail].

Air ValveThroughout the Fill Mode, line voltage issupplied to the (normally closed) air valve.When energized, the air valve opens.[This allows air to pass thru the valve so thatwater can flow from the reservoir].

Vent ValveThroughout the Fill Mode, line voltage issupplied to the (normally open) vent valve.When energized, the vent valve closes.[This prevents water from flowing back into thereservoir thru the vent valve].

Fill ValveDuring the Fill Mode, line voltage is suppliedto the (normally closed) fill valve. Whenenergized, the fill valve opens allowing waterto flow into the chamber.

When the water level in the chamber reachesthe water level sensor, the PC Board stops thecurrent flow to the fill valve. This allows thevalve to close, stopping the flow of water intothe chamber.

Water Level SensorThroughout the Fill Mode, 5 VDC is supplied tothe water level sensor. When the water level inthe chamber reaches the sensor, a circuit iscompleted and current flows back to the PCBoard.

When the 5 VDC from the water level sensor isdetected, the PC Board stops the current flow tothe fill valve.

During the Fill Mode, the display panel will show:

ALL

A-22




Troubleshooting[Heat-Up Mode]Error Codes Page

C103 ................................................ A-5C383 ................................................ A-7C533 ................................................ A-8C563 ................................................ A-8C573 ................................................ A-8C633 ................................................ A-9C663 ................................................ A-9C673 ................................................ A-9C983 ................................................ A-10

Heat-Up ModeThis illustration calls out the components that are energized / monitored during the Heat-Up Mode.Refer to the following page for a detailed description of the Heat-Up Mode.

[Refer to to Main Power System for components that are continually monitored during all modes]


Pressure Sensor[on Main PC Board]

Heat-Up Mode

Heating Element - ON[Line VAC]

Air Valve - closed-open[Line VAC is supplied

intermittently to open the valve]

Temperature Sensor[5 VDC]

ALL

A-23




Heat-Up ModeDuring the Heat-Up Mode, the water in thechamber is heated to achieve the propertemperature for sterilization.


Heating ElementThroughout the Heat-Up Mode, line voltage iscontinually supplied to the heating element.The heating element heats the water in thechamber until sterilzation temperature isachieved.

Vent ValveThroughout the Heat-Up Mode, line voltage issupplied to the (normally open) vent valve.When energized, the vent valve closes.[This prevents water from flowing back into thereservoir thru the vent valve].

Air ValvePeriodically during the Heat-Up Mode, linevoltage is supplied to the (normally closed) airvalve. When energized, the air valve opens.[This occurs three times during this mode toexpel air from the chamber.]

Temperature Sensor & Pressure SensorThe temperature sensor (inside chamber) &pressure sensor (on Main PC Board) monitor thetemperature & pressure conditions inside thechamber.

When the pre-set sterilization conditions are met,the Heat-Up Mode is complete & the unit goesinto the Sterilization Mode.

Heat-Up Mode

During the Heat-Up Mode, the display panel will show:Cycle that hasbeen selected

ChamberPressure

ChamberTemperature

ALL

A-24




Sterilization Mode

Troubleshooting[Sterilization Mode]Problem: PageError Codes:

C104 ................................................ A-5C384 ................................................ A-7C534 ................................................ A-8C544 ................................................ A-8C564 ................................................ A-8C574 ................................................ A-8C664 ................................................ A-9C674 ................................................ A-9C984 ................................................ A-10

Biological test strips indicate itemsare not sterile (no Error Code) .......... A-13

Sterilization ModeThis illustration calls out the components that affect the Sterilization Mode.Refer to the following page for a detailed description of the Sterilization Mode.

[Refer to to Power-Up Mode for components that are continually monitored during all modes]


Air Valve - closed[no voltage]

Heating Element - ON-OFF[Line VAC is supplied intermittentlyto manitain sterilization parameters]



ALL

A-25




Sterilization Mode

During the Sterilization Mode, the display panel will show:

Sterilization ModeDuring the Sterilization Mode, the temperatureand pressure parameters for the selectedcycle are maintained for the required time.


Temperature Sensor & Pressure SensorThe temperature sensor (inside chamber) &pressure sensor (on Main PC Board)monitor the temperature & pressure conditionsinside the chamber throughout the Sterilization Mode.

Heating ElementBased on readings from the temperature sensor &pressure sensor, the heating element is cycledON / OFF to maintain the required temperature andpressure for the selected cycle.

Vent ValveThroughout the Sterilization Mode, line voltageis supplied to the (normally open) vent valve.When energized, the vent valve closes.[This prevents water from flowing back into thereservoir thru the vent valve].

Air ValveThe air valve is closed (no voltage) throughout theentire Sterilization Mode.[This prevents pressure from escaping the chamber].

Sterilization timecounts down

ChamberTemperature

ChamberPressure

ALL

A-26




Troubleshooting[Vent Mode]Error Codes Page

C105 ................................................ A-5C565 ................................................ A-8C575 ................................................ A-8C645 ................................................ A-9C665 ................................................ A-9C675 ................................................ A-9C985 ................................................ A-10

Vent ModeThis illustration calls out the components that affect the Vent Mode.Refer to the following page for a detailed description of the Vent Mode.

[Refer to to Power-Up Mode for components that are continually monitored during all modes]

Vent Valve - open[no voltage]

Condensing Coil

Vent Mode

Air Valve - closed[no voltage]


ALL

A-27




Vent ModeDuring the Vent Mode, pressure is releasedfrom the chamber. The steam cools as itpasses thru the condensing coil and the wateris returned to the reservoir.


Vent ValveDuring the Vent Mode, the PC Board stops thecurrent flow to the (normally open) vent valve.This allow the valve to open, and the pressure(steam) is released from the chamber.

Condensing CoilWhen the steam is released from the chamber,it passes thru the condensing coil. The coil coolsthe steam and returns the water back to thereservoir.

Air ValveThe air valve is closed (no voltage) throughoutthe entire Vent Mode.

Pressure SensorThe pressure sensor (on Main PC Board)monitors the chamber pressure as it is released.When the pressure reaches 0.7 psi (5kPa), youwill hear several "beeps". This indicates the doorwill open in approximately 5 seconds.

Vent Mode

During the Vent Mode, the display panel will show:

ChamberPressure

ChamberTemperature

ALL

A-28




Door Motor System

Door Motor SystemThis illustration shows only the components that affect the Door Motor System.Refer to the following page for a detailed description of the Door Motor System.

Door Motor - ON[Line VAC]

Door Switch[Closed - when door is closed]

[Open - when door is open]

High-Limit Thermostats - closed[Line VAC]

Door Motor Switch

Troubleshooting[Door Motor System]Error Codes PageC106 .................................................... A-5C326 .................................................... A-7

Cam

M9 (-020 thru -022)all

M11 (-020 thru -022)all

A-29




Door Motor System

When the Door Motor System is activated, the display panel will show:

Door Motor SystemTh Door Motor System automatically opens the sterilizerdoor when the Vent Mode is complete.


Door Motor / Door Motor SwitchFor the first 15 seconds, line voltage is supplied directlyto the door motor. This causes the motor to run, rotatingthe cam and linkage downward.

As the cam mechanism rotates, the motor switch closes.After 15 seconds, the current to the door motor flows thruthe closed door switch. The cam continues to rotate,causing the linkage to lift the door latch mechanism andopen the door.

When the cam reaches the bottom of its travel, the doormotor reverses direction. When the mechanism reachesits original position, the motor switch is opened. Thisstops current flow to the motor, and the motor stops.

Door SwitchThe status of the (normally open) door switch reflects theposition of the door. (ex. Door open= switch open)

M9 (-020 thru -022)all

M11 (-020 thru -022)all

A-30




Drying ModeThis illustration shows only the components that affect the Drying Mode.Refer to the following page for a detailed description of the Drying Mode.

Drying Mode

Heating Element - ON-OFF[Line VAC is supplied at pre-set intervals

for the duration of the Drying Mode]

High-Limit Thermostats - closed[Line VAC]

Troubleshooting[Drying Mode]Problem: PageError Codes:

C567 ................................................ A-8C577 ................................................ A-8C647 ................................................ A-9C667 ................................................ A-9C677 ................................................ A-9C987 ................................................ A-10

Instruments still wet after Dry Mode..... A-14Packs are burning during Dry Mode .... A-14

Sterilizer Door[Must be open]


ALL

A-31




Drying ModeDuring the Drying Mode, the heating element isenergized to dry the instruments in the chamber.


Heating ElementDuring the Drying Mode, line voltage is suppliedto the heating element at pre-set intervals to turnit ON / OFF. This continues for the duration of theDrying Mode.

When the drying time expires, voltage is removedfrom the high-limit thermostats and the heatingelement.

Temperature SensorThe temperature sensor (inside chamber) monitorsthe temperature throughout the Drying Mode. If thetemperature exceeds 240F (115C), the PC boardstops the current flow to the heating element untilthe temperature drops.

Sterilizer DoorThe sterilizer door must remain open throughoutthe Drying Mode. If the door is closed, pressuremay build up in the chamber resulting in an errorcode.

Drying Mode

During the Drying Mode, the display panel will show:

Drying timecounts down

ALL

A-32




Fan System

Fan SystemThis illustration shows only the components that affect the Fan System.Refer to the following page for a detailed description of the Fan System.

Fan [Line VAC][OFF when fan thermostat contacts are open][ON when fan thermostat contacts are closed]

Troubleshooting[Fan System]Problem PageFan does not run when temperature

exceeds 130 ................................... A-15Fan continues to run after temperature

drops below 100 .............................. A-15

Fan Thermostat [Line VAC][less than 130- contacts are open]

[more than 130 - contacts are closed]

Primary Fuses (2)

Temperature at Fan Thermostat

ALL

A-33




Fan System

Fan SystemThe Fan System reduces heat inside the enclosure bycirculating air between the chamber and the covers.

[The electrical current to the fan system does not passthru the high-limit thermostats (on bottom of chamber)].

Primary FusesWith the table's power cord properly connected, facilitysupply voltage is supplied to the Main PC Board thru thetwo primary fuses.

If either fuse is faulty, the sterilizer will have no power.

Fan ThermostatWhen power is supplied to the Main PC Board, currentcontinuously flows to the fan thermostat.

The fan thermostat controls the ON/OFF function of thefan. When the temperature (at the thermostat) is less than130, the fan thermostat contacts are open (no current tothe fan). When the temperature reaches 130, the fanthermostat contacts close (current flow to the fan).When the temperature drops to approx. 100, thecontacts of the fan thermostat open and the fan stopsrunning.

ATTENTIONThe fan may run continuouslywhen running consecutive cycles.

FanWhen the contacts of the fan thermostat are closed, linevoltage is applied to the fan causing the fan to run.When the contacts of the thermostat open, current isremoved, and the fan stops.

ALL

A-34




PC-Based Diagnostic ProgramThe PC-Based Diagnostic Program allows you to monitor chamber conditions,and the status of vital components through your PC.

This program requires the following:

PC / Laptop w/CD drive (Windows-compatible) Documark CD (Version 9.0 or later) Diagnostic Kit (refer to Section E for part number)

includes: Interface CableRS-232 CableInstruction Sheet

PC-Based Diagnostic Program

Refer to: PageExploded View / Part numbers ............ E-22

MA639101i

R

Step 1: Unplug power cord.Remove right side panel.

Step 3: Connect RS-232 cableto interface cable.

Step 2: Connect interface cable toJ10 on sterilizer PC board.

Step 4: Plug RS-232 cable into port on PC. Note: When connecting the RS-232 cable,

note the specific port used (A, B, etc.)

Interface Cable

RS-232 Cable

PC-BasedDiagnostic Program

ALL

Step 5: Click on Launch Diagnostic Program button.

(Step 5 must be performed from the CD version of Documark 9.0 or later.The button will not function from www.documark.com)

sting & Repair

B-1 Midmark Corporation 2004 SF-1854

/ Procedure Pager Pressure Leaks .............. B-2sure Gauge ...................... B-3.......................................... B-4nostics .............................. B-5.......................................... B-12lves................................... B-15lief Valve ........................... B-18ent ................................... B-20 Sensor ............................. B-23Sensor .............................. B-27ermostats ........................ B-31

.......................................... B-34Display Panel ................... B-37ystem .............................. B-39ermostat ........................... B-42rd ..................................... B-46nal) ................................... B-50 Drying Mode ................... B-53Component Te


Sect

ion

BComponentChecking FoUsing a PresFuses .....Service DiagAir Valve .....Fill / Vent VaPressure ReHeating ElemTemperatureWater Level High-Limit ThDoor SwitchTouch Pad / Door Motor SFan / Fan ThMain PC BoaPrinter (optioAdjusting the

Testing & Repair

Component Testing & Repair

B-2Models:

Serial Numbers: Midmark Corporation 2004 SF-1854

MA662800i

*

**

Components PageAir Valve ............................................... B-12Fill Valve ............................................... B-15Vent Valve ............................................ B-15Pressure Relief Valve ........................... B-18

Checking forPressure Leaks

Door GasketsIs there water leaking around door?

If YES, replace gasket(s).Fill ValveAre there bubbles coming from the bottom of the reservoir**?

If YES, clean / test the fill valve.

Pressure Relief ValveIs there water or steam leakage under back of sterilizer?

If YES, test the pressure relief valve.

Air ValveIs there steam exhausting from condensing coil* during the Sterilization Mode?

If YES, clean / test the air valve.

Pressure Sensor HoseIs there steam leaking from hose/PC board connection?

If YES, secure with hi-temp. cable tie.

Checking for Pressure LeaksThis illustration shows the areas to check for pressure leaks.

All FittingsTighten / replace fittings if necessary.

Vent ValveIs there water leaking from the condensing coil*?

If YES, clean / est the vent valve.

ALL

WARNINGDo not attempt to adjust,

modify, or alter in any manner, any partof the pressure vessel. Serious injuryand/or damage to the unit could result.

Rev 8/06


B-3Models:


Using a Pressure Gauge

MA617801i

DisconnectingStep 1: Disconnect pressure gauge harness.

ConnectingStep 1: Cut cable tie & disconnect

tubing from PC board.

DisconnectingStep 2: Connect tubing to PC board.

Secure tubing with high-temp cable tie.

ConnectingStep 2: Connect pressure gauge harness

to PC board and tubing.

Refer To: PageCover Removal ..................................... C-2Note

To test chamber pressure, a PressureGauge Harness is available (002-0372-00).

Using aPressure Gauge

ALL


B-4Models:


MA667700iF2

F1

Fuse Ratings:115 VAC models:

F1 ................ 0.250 amp, 250 V, Slo-Blo, 1/4" x 1-1/4"F2 ................ 15 amp, 250 V, Fast-Acting, 1/4" x 1-1/4"

230 VAC models:F1 ................ 0.125 amp, 250 V, Slo-Blo, 5mm x 20mmF2 ................ 8 amp, 250 V, Fast-Acting, 5mm x 20mm

Fuse TestStep 2: Place meter probes

on each end of fuse.

Fuses

LocationFuses PageLocation ............................................... B-2Fuse Test ............................................. B-2Wiring Diagrams ................................... D-1Fuse Rating ...............................6.3A, 250V

Type T, 5 x 20mmPart Number ............................ 015-0346-20

Fuse TestStep 1: Set meter to 200 .....

gnidaeRreteM sutatS noitcAderiuqeR

OL Replace both fuses.

Fuse - OKless than 5

Fuses PageLocation ............................................... B-4Fuse Test ............................................. B-4Cover Removal ..................................... C-2Wiring Diagrams ................................... D-1Part Numbers ....................................... E-16

Fuse Test

Fuses ALL


B-5Models:


Service Diagnostics PageActivating Service Diagnostics ............. B-5Test Selection Screen:

(I/O Test , Recall Errors, Keytest) ..... B-6

Service Diagnostics

Service DiagnosticsThe Service Diagnostics feature allows you to view recent error codes and test the sterilizer'smajor components without running a complete cycle. The Service Diagnostics tests should alwaysbe done before replacing any major component.

CAUTIONThis operation requires power to be connected to the unit with the panels removed.Use caution when performing this procedure.

Activating Service Diagnostics

Service DiagnosticsStep 2: Remove right side panel.

Service DiagnosticsStep 3: Move switch #1 on

the SW1 block to ON.

Service DiagnosticsStep 4: Reconnect power cord.Service Diagnostics

Step 1: Disconnect power cord.

AttentionTo return to normal operating mode...A. Disconnect power cord.B. Move #1 switch (SW1 block) to OFF.C. Reconnect power cord.

Service DiagnosticsStep 5: Press START button.

[Then, go to Test Selection Screen page].

ALL


B-6Models:


Service Diagnostics

Service Diagnostics

Test Selection ScreenService Diagnostics PageTest Selection:

I/O Test ............................................. B-7Recall Errors ..................................... B-10Keytest .............................................. B-11

Press the START button to initiate the I/O Test.This test allows you to energize the air valve,vent valve, fill valve, door motor, and heating elementindependently without running a cycle.

This test also displays the temperature & pressureinside the chamber, and the status of the high-limitthermostats, door switch, and the water level sensor

Press the STOP button to show thelast five error codes displayed on the unit

Press the HANDPIECES button to initiate the Keytest.This test allows you to check the functionality of thebuttons on the touch pad.

ALL


B-7Models:


Service Diagnostics

I/O Test

Service Diagnostics

I/O TestPress the START button.This energizes the Air Valve, causing it to open.Pressing the START button again, closes the valve.[You should hear a "click" when the valve opens / closes.This indicates the PC Board and valve are functioning properly].Press the STOP button for the next test.

I/O TestPress the START button.This energizes the Vent Valve, causing it to close.Pressing the START button again, opens the valve.[You should hear a "click" when the valve opens / closes.This indicates the PC Board and valve are functioning properly].Press the STOP button for the next test.

I/O TestPress the START button.This energizes the Fill Valve, causing it to open.Pressing the START button again, closes the valve.[Water will flow into the chamber when the valve opens.This indicates the PC Board and valve are functioning properly].Press the STOP button for the next test.

AttentionThe door switch must be tripped when testing the Fill Valve. Close the door or manually trip the switch.The water level sensor does not function during this test. The chamber will overflow if the valve is left open too long.

Air Valve

Refer to: PageAir Valve ............................................... B-12Vent Valve ............................................ B-15Fill Valve ............................................... B-15Main PC Board ..................................... B-46

Vent ValveFill Valve

ALL


B-8Models:


Service Diagnostics

I/O Test - continued

Service Diagnostics

AttentionThis test should be done with the door closed.

Door Motor System

I/O TestPress the START button.This energizes the Door Motor System.[The door should open after approx. 15 seconds. This indicatesthe PC Board and door motor are functioning properly].Press the STOP button for the next test.

AttentionDo not run this test more than twice without allowing the unit to cool.Doing so may cause the sterilizer to overheat.

I/O TestPress the START button.This energizes the Heating Element.[The heating element should heat up for approx. 15 seconds, then shut off.This indicates the PC Board and heating element are functioning properly].Press the STOP button for the next test. Heating Element

Refer to: PageDoor Motor System .............................. B-39Heating Element ................................... B-20Main PC Board ..................................... B-46

ALL


B-9Models:


Service Diagnostics

I/O Test - continued

High-Limit ThermostatsStatus should always be: CLOSED.OPEN, indicates malfunctioningthermostat(s), or that the unit hasoverheated.

Door SwitchStatus should correctlyreflect the position of the door.(OPEN or CLOSED) Water Level Sensor

Status should reflect the amount ofwater in the chamber. If water iscontacting the sensor, status shouldbe: FULL. If not: EMPTY

I/O TestThe display shows the status of the High-Limit Thermostats,the Door Switch, and the Water Level Sensor.[If the display reading shows a malfunction, test the corresponding component].Press the STOP button for the next test.

Service Diagnostics

Chamber Temperature[verify w/ thermometer]

Chamber PressureWith the door open, displayshould show: 0.0 PSI (0.0 kPa)

I/O TestThe display shows the chamber temperature & pressure.Press the STOP button to return to the Test Selection Screen.

Refer to: PageHigh-Limit Thermostats ........................ B-31Door Switch .......................................... B-34Water Level Sensor .............................. B-27

ALL


B-10Models:


Service Diagnostics

Service Diagnostics

Recall Errors

Recall ErrorsThe display shows the last five error codes displayed on the unit.[NOTE: 1: is the most recent error code, 5: is the oldest]

Recall ErrorsTo erase all five error codes from memory...Press the START button.

To retain the error codes...Press the STOP button.

Refer to: PageError Codes .......................................... A-2

ALL


B-11Models:


Service Diagnostics

Service Diagnostics

Keytest

KeytestPress the START button.[When the designated button is pressed, you will hear single"beep", and the test will advance to the next button. Thisindicates the button is functioning properly].

KeytestPress the STOP button.

KeytestPress the HANDPIECES button.[Continue for all remaining buttons].

Refer to: PageTouch Pad / Display Panel ................... B-37

ALL


B-12Models:


Air Valve

Air Valve

Location & Function

During the Fill Mode...Line voltage is supplied to the air valve. This causes thevalve to open so that water can flow into the chamber.

During the Heat-Up Mode...When the Heat-Up Mode begins, the PC board stops thecurrent flow to the air valve. This allows the valve to close.The PC board opens the air valve three times during theHeat-Up Mode to release air from the chamber (this preventsvacuum-effect).During the Sterilization, Vent, & Drying Modes...There is no current flow to the air valve - the valve is closed.

Air Valve PageLocation & Function .............................. B-12Electrical Testing .................................. B-13Replacement ........................................ B-14Wiring Diagrams ................................... D-1Exploded View / Part Numbers ............. E-9

ALL


B-13Models:


Air Valve

Air Valve

Electrical Testing

Air Valve TestStep 2: Place meter probes on terminals.

[Set meter to M ohms ()]

Anything other then OL

Acceptable Range:

Refer to: PagePC Board Relay Test ............................ B-48Cover Removal ..................................... C-2

Air Valve TestIf reading is out of acceptable range...Replace air valve.

If reading is within acceptable range...Perform PC Board Relay Test.

Air Valve TestStep 1: Disconnect wires from air valve.

ALL

(Rev. 2/05)

Note:For Solenoid coils marked with FWR (FullWave Rectified) use the M ohms Scale tocheck the coil. An OL or Open readingindicates a bad or open coil.Always use the Service Diagnosticfunction to check valve operation.


B-14Models:


Air Valve ALL

Air Valve

Replacement / Cleaning

MA663600i

InstallationStep 2: Position air valve as shown.

Tighten compression fittings.

RemovalStep 1: Loosen compression fittings.

Remove air valve.

InstallationStep 1: Apply hi-temp hydraulic sealant

(Loctite 565) to threads of elbow fittings.Do not use teflon tape!

Install fittings onto air valve.

Refer to: PageCover Removal ..................................... C-2

Rev. 8/04

Out

RemovalStep 2: Remove two elbow

fittings from air valve.

In

MA676701i

DisassemblyStep 1: Remove nut,coil retainer, and coil.

DisassemblyStep 2: Remove Valve

Stem and cleanports in valve body.

InstallationStep 3: Run test cycle.

Check for leaks.

AssemblyStep 1: If necessary, replace

O-ring in body and flatgasket on stem, thenassemble valve.


B-15Models:


Fill / Vent Valves

Location & FunctionFill / Vent Valves PageLocation & Function .............................. B-15Electrical Testing .................................. B-16Cleaning / Replacement ....................... B-17Wiring Diagrams ................................... D-1Exploded View / Part Numbers ............. E-10

Fill / Vent Valve

Fill ValveDuring the Fill Mode...Line voltage is supplied to the fill valve. This causesthe valve to open, allowing water to flow into the chamber.

When the water in the chamber reaches the water level sensor,the PC board stops the current flow to the fill valve. This allowsthe valve to close, stopping the flow of water into the chamber.

During the Heat-Up, Sterilization, Vent, & Drying Modes...There is no current flow to the fill valve.The valve is closed.

Vent ValveDuring the Fill, Heat-Up, & Sterilization Modes...Line voltage is supplied to the vent valve. This causes thevalve to close so that pressure can build in the chamber.

During the Vent Mode...The PC board stops the current flow to the vent valve. Thisallows the valve to open, releasing pressure from the chamber.

During the Drying Mode...There is no current flow to the vent valve.The valve is open.

ALL


B-16Models:


Fill / Vent Valves

Electrical Testing[The testing procedure is the same for the fill valve and the vent valve].

Fill / Vent Valve

Fill & Vent ValvesAnything other then OL

Acceptable Range (115 VAC Units):

Electrical TestIf reading is displayed OL...Replace faulty valve.


Electrical TestStep 1: Disconnect wires from valve terminals.

Acceptable Range (230 VAC Units):Fill Valve ...................... Any reading other then OLVent Valve ................... Any reading other then OL

Refer To: PagePC Board Relay Test ............................ B-48Cover Removal ..................................... C-2

Electrical TestStep 2: Place meter probes on terminals

of malfunctioning valve (vent shown).[Set meter to M ohms ()]

ALL

(Rev. 2/05)

Note:For Solenoid coils marked with FWR (FullWave Rectified) use the M ohms Scale tocheck the coil. An OL or Open readingindicates a bad or open coil.Always use the Service Diagnosticfunction to check valve operation.


B-17Models:


MA664000i

MA664101i

Fill / Vent Valves

Cleaning / Replacement

Fill / Vent Valve

Removal (Fill / Vent)Step 3: Disconnect wires from

terminals of faulty valve.

Removal (Vent only)Step 2: Disconnect compression

fitting from top of vent valve.

Refer to: PageDraining the Reservoir .......................... C-4Cover Removal ..................................... C-2

Installation (Vent only)Step 3: Connect compression fitting

to top of vent valve.

Installation (Fill / Vent)Step 2: Connect wires to valve terminals.

Installation (Fill / Vent)Step 4: Refill reservoir.

Run test cycle.Check for leaks.

Removal (Fill / Vent)Step 4: Disassemble valve

(Vent valve shown - Fill valve is similar)Remove any debris.

Use a 3/4" spanner wrenchto remove plunger housing

Installation (Fill / Vent)Step 1: Assemble valve.

(Vent valve shown - Fill valve is similar)

Removal (Fill / Vent)Step 1: Drain water from reservoir.

ALL

O-Ring Slot


B-18Models:


Pressure Relief Handle

Relief Valve Tubing

Pressure Relief Valve


Location & Function

The pressure relief valve opens if the pressure inside the chamberreaches 40 psi (275 kPa). When the valve opens, pressurized steamis released from the bottom of the sterilizer thru the relief valve tubing.

The valve can be opened manually by pulling the pressure relief handle.

Testing

Note: This test should be performed whenever the unit is serviced.

Pressure Relief Valve PageLocation & Function .............................. B-18Testing ............................................... B-18Replacement ........................................ B-19Exploded View / Part Numbers ............. E-9

Pressure Relief Valve TestStep 1: Start an Unwrapped cycle.

Pressure Relief Valve TestIf steam continues to discharge when handle is released...Pull handle, then quickly release until valve "snaps" closed.

If valve will not close, replace valve.

Pressure Relief Valve TestCautionTo prevent burns, place a towel aroundbottom of sterilizer.

Step 2: When chamber pressure reaches 25 psi,pull pressure relief handle briefly, then release.

[Steam should discharge when handle is pulled, andcompletely stop when handle is released].

ALL


B-19Models:


MA617601i


Replacement


RemovalStep 1: Pull pressure relief handle to

purge pressure from chamber.

RemovalStep 3: Remove pressure relief valve.

InstallationStep 1: Apply hi-temp hydraulic sealant (Loctite 565)

to pressure relief valve threads.Do not use teflon tape!

Install pressure relief valve.

RemovalStep 2: Disconnect relief valve tubing.

Remove elbow fitting.

InstallationStep 2: Install elbow fitting.

Connect relief valve tubing.

Refer to: PageCover Removal ..................................... C-2

ALL


B-20Models:


Heating Element

Location & FunctionHeating Element PageLocation & Function .............................. B-20Testing ............................................... B-21Replacement ........................................ B-22Wiring Diagrams ................................... D-1Exploded View / Part Numbers ............. E-12

Heating Element

During the Fill & Vent Modes...There is no current flow to the heating element.Heating element is OFF.

During the Heat-Up Mode...Line voltage is continually supplied to the heating element.The heating element heats the water in the chamber untilsterilzation temperature is achieved.

During the Sterilization Mode...Based on readings from the temperature and pressure sensors,the heating element is cycled ON and OFF to maintain the requiredparameters for the selected cycle.

During the Drying Mode...Line voltage is supplied to the heating element at pre-set intervalsto turn it ON / OFF. This continues for the duration of the DryingMode.

ALL


B-21Models:


Heating Element

Heating Element

Testing

Acceptable Range:

Heating Element TestIf reading is out of acceptable range...Replace heating element.


115 VAC ................ 9.0 to 11.0230 VAC ................ 34.0 to 42.0

Refer To: PageCover Removal ..................................... C-2PC Board Relay Test ............................ B-48

Heating Element TestStep 2: Place meter probes on heating

element terminals.[Set meter to 200 ohms ()]

Heating Element TestStep 1: Remove bottom cover.

Disconnect wires from heating element.

ALL


B-22Models:


MA664500i

Heating Element

Heating Element

Replacement

Heating Element

RemovalStep 3: Remove heating element and spacer.

SpacerGaskets

InstallationStep 1: Install gaskets onto heating element.

Install spacer and heating element.

RemovalStep 2: Disconnect wires from heating element.

Remove nuts, lockwashers, & brass washers.

InstallationEquipment AlertDo not overtighten nuts!Torque must not exceed 25 ft/lbs (34NM).

Step 2: Install brass washers, lockwashers, & nuts.Connect wires to heating element.

RemovalStep 1: Drain water from reservoir.


ALL


B-23Models:


Temperature Sensor

Temperature Sensor

Location & FunctionTemperature Sensor PageLocation & Function .............................. B-23Testing ............................................... B-24Replacement ........................................ B-26Exploded View / Part Numbers ............. E-9

During the Fill Mode...The temperature sensor is not monitored.

During the Heat-Up & Sterilization Modes...The temperature sensor continually monitors the chambertemperature and transmits this information to the PC board.

The PC board turns the heating element ON / OFF based on thereadings from the temperature sensor.

During the Vent Mode...The temperature sensor continually monitors the chambertemperature and transmits this information to the PC board.

During the Drying Mode...The temperature sensor continually monitors the chambertemperature and transmits this information to the PC board.

If the temperature exceeds 240F (115C), the PC board stopsthe current flow to the heating element until the temperature drops.

ALL


B-24Models:


Temperature Sensor

Temperature Sensor

Testing

Acceptable Range:

Temperature Sensor TestIf reading is out of acceptable range...Replace temperature sensor.

If reading is within acceptable range...Perform Supply Voltage Test.

Temperature Sensor TestStep 1: Disconnect sensor harness

from J12 on PC board.

Temperature Sensor TestStep 2: Place meter probes on red and white wires.

[Set meter to 2K ohms ()]

1.07 to 1.1

Refer To: PageSupply Voltage Test ............................. B-25Cover Removal ..................................... C-2

Service TipResidue can build up on the sensor probecausing inaccurate temperature readings.

Clean the probe with SpeedClean and anabrasive pad.

Probe

ALL

Rev 10/06


B-25Models:


SA110600

TP 1

TP 2 TP3 TP4

TP5

4.0 to 6.0 VDC

Multimeter1000 DC750 AC

200

20

2

200mV

M

200k

20k

2k

200

Temperature Sensor

Temperature Sensor

Supply Voltage Test

Acceptable Range:

Supply Voltage TestIf reading is out of acceptable range...Replace main PC board.

If reading is within acceptable range...Main PC board is functioning properly

Refer To: PageCover Removal ..................................... C-2

ALL

Supply Voltage TestStep 1: Place meter probes on test points:

Black probe: TP2 Red probe: TP4

[Set meter to 20 VDC]


B-26Models:


J12

MA664700i

RemovalStep 1: Disconnect sensor harness

from J12 on PC board.

RemovalStep 2: Remove temperature sensor.

Temperature Sensor

Replacement

InstallationStep 1: Apply hi-temp hydraulic sealant (Loctite 565)

to temperature sensor threads.Do not use teflon tape!

Install temperature sensor.

InstallationStep 2: Connect sensor harness

to J12 on PC board.


Temperature Sensor ALL


B-27Models:


Water Level Sensor

Water Level Sensor

Location & FunctionWater Level Sensor PageLocation & Function .............................. B-27Testing ............................................... B-28Replacement ........................................ B-30Wiring Diagrams ................................... D-1Exploded View / Part Numbers ............. E-9

During the Fill Mode...5 VDC is supplied to the water level sensor. When the water level inthe chamber reaches the sensor disk, a circuit is completed andcurrent flows back to the PC Board.

When the 5 VDC from the water level sensor is detected, the PCBoard stops the current flow to the fill valve.

During the Heat-Up, Sterilization, Vent, & Drying Modes...The water level sensor is not monitored.

Sensor Disk

ALL


B-28Models:


Water Level Sensor

Water Level Sensor

Testing

Acceptable Reading:

Water Level Sensor TestIf reading is anything other than OL...Replace water level sensor.

If reading is OL...Perform Supply VoltageTest.

Water Level Sensor TestStep 2: Place one meter probe on sensor terminal.

Place other probe on chamber wall.[Set meter to 2K ohms ()]

Water Level Sensor TestStep 1: Disconnect wire from sensor terminal.

OL

Refer To: PageSupply Voltage Test ............................. B-29Cover Removal ..................................... C-2

Service TipResidue can build up on the sensor diskcausing malfunctions during the Fill Mode.

Clean the disk with SpeedClean and anabrasive pad, then dry thoroughly.

ALL


B-29Models:


SA110500

TP 1

TP 2 TP3 TP4

TP5

4.0 to 6.0 VDC

Multimeter1000 DC750 AC

200

20

2

200mV

M

200k

20k

2k

200

Water Level Sensor

Water Level Sensor

Supply Voltage Test

Acceptable Range:

Supply Voltage TestIf reading is out of acceptable range...Replace main PC board.

If reading is within acceptable range...Main PC board is functioning properly

Supply Voltage TestStep 1: Place meter probes on test points:

Black probe: TP2 Red probe: TP3

[Set meter to 20 VDC]

ALL


B-30Models:


Water Level Sensor

Water Level Sensor

Replacement

MA665200i


RemovalStep 1: Disconnect wire from sensor.

RemovalStep 2: Remove nut, terminal, & compression nut.

RemovalStep 3: (From inside of chamber)

Remove sensor, spacer, & teflon tube.

InstallationStep 1: Install teflon tube & spacer onto sensor.

Insert sensor thru hole in chamber.

InstallationEquipment AlertDo not overtighten compression nut![Tighten 1-1/4 turns from finger-tight]

Step 2: Install compression nut.Install terminal & nut.

InstallationStep 3: Perform test on page B-26 to

assure sensor is not grounded.

InstallationStep 4: Connect sensor wire.

ALL


B-31Models:


High-Limit Thermostats

High Limit Thermostats

Location & FunctionHigh-Limit Thermostats PageLocation & Function .............................. B-31Testing ............................................... B-32Replacement ........................................ B-33Exploded View / Part Numbers ............. E-12

During all modes...Line voltage continually flows thru the normally closedcontacts of the two high-limit thermostats. This circuitpowers all of the line voltage components, except for theFan System.

If the temperature at either of the thermostats exceeds450F (+25) / 232C (+14), the thermostat contactsopen. This interrupts power, and terminates the cycle.[An error code will appear on the display].

The thermostat contacts reset to the closed position atapproximately 325F / 163C.

ALL


B-32Models:




Testing

High-Limit Thermostat TestStep 1: Disconnect wires from thermostat.

NoteHigh-limit thermostats must be tested at room temperature.

High-Limit Thermostat TestStep 2: Place meter probes on thermostat terminals.

[Set meter to 200 ohms ()]

0.00 (approximately)

Acceptable Range:

High-Limit Thermostat TestIf reading is (approximately) 0.00 ...High-limit thermostat is good.

If reading is OL...Replace high-limit thermostat.

ALL


B-33Models:




Replacement

MA6655000i


RemovalStep 1: Drain water from reservoir.

RemovalStep 3: Remove nuts, lockwashers ,

& brass washers from heating element.

RemovalStep 4: Remove bracket & thermostats.

InstallationStep 1: Place the thermostats &

bracket in position.

InstallationEquipment AlertInspect heating element gaskets & wire spacer(inside chamber) before tightening nuts.

Step 2: Install brass washers, lockwashers,& nuts onto heating element.

RemovalStep 2: Disconnect wires from both

thermostats & heating element.

Wire Connectionswhite jumper wire .......... between thermostatsyellow wire .................... thermostatred wire ..................... thermostatbrown wire .................... heating elementbrown/white wire ........... heating element

InstallationStep 3: Connect wires to both

thermostats & heating element.

ALL


B-34Models:


Door Switch

Door Switch

Location & FunctionDoor Switch PageLocation & Function .............................. B-34Testing ............................................... B-35Replacement ........................................ B-36Wiring Diagrams ................................... D-1Exploded View / Part Numbers ............. E-7

NoteWhen the door is open, the door switch is untripped / open.When the door is closed, the door switch is tripped / closed.

During the Fill, Heat-Up, & Sterilization Modes...When a cycle is initiated, the PC board monitors the status ofthe door switch.

If an open door is detected, the cycle will not start.If the door switch opens during a cycle, the cycle will beterminated and the corresponding error code will appear inthe display.

During the Vent, & Drying Modes...The door switch is not monitored.

ALL


B-35Models:


Door Switch

Door Switch

Testing

Acceptable Reading:

Door Switch TestIf reading is out of acceptable range...Replace door switch.

If reading is within acceptable range...Door Switch is functioning properly.

Door Switch TestStep 2: Place meter probes on door switch wires.

[Set meter to 200 ohms ()]Open and close the door.

NoteThe door switch must be tested with the door OPEN and CLOSED.

Door Switch TestStep 1: Disconnect two door switch wires

from J1 & J2 of main PC board

Door OPEN ............. OLDoor CLOSED ........ 0.05 to 0.2


ALL


B-36Models:



Door Switch

Door Switch

Replacement

MA665800i

NCC NO

RemovalStep 1: Disconnect door switch wires

from main PC board (J1 & J2).

RemovalStep 2: Remove scews, lockwashers,

nuts, & door switch

InstallationStep 1: Position door switch and secure

with screws, lockwashers, & nuts.InstallationStep 2: Connect door switch wires

to main PC board (J1 & J2).

ALL


B-37Models:


Touch Pad / Display Panel

Location & FunctionTouch Pad / Display Panel PageLocation & Function .............................. B-37Testing (Service Diagnotics: Keytest) ... B- 5Replacement ........................................ B-38Wiring Diagrams ................................... D-1Exploded View / Part Numbers ............. E-15

Touch Pad /Display Panel

NoteThe touch pad is attached to the outside of the top cover.The display panel is attached to the inside of the top cover.

During all Modes...When the buttons on the touch pad are depressed, theselection is transmitted to the main PC board through thedisplay panel.

As the main PC board initiates the selected function,informational messages (time & temp., error codes, etc.)appear on the display panel.

Touch Pad

Display Panel

ALL


B-38Models:


MA666000i

Touch Pad / Display Panel

Replacement

Touch Pad /Display Panel

RemovalStep 1: Remove top cover.

RemovalStep 3: Remove two screws.

Slide display panel out from under tab.RemovalStep 2: Disconnect ribbon harnesses

from display panel (J2 & J3).

RemovalStep 4: Peel touch pad off of top cover.

[Remove adhesive residue w/ a citrus-basedsolvent that is safe for use on plastics]

InstallationStep 1: Peel backing from touch pad.

Feed ribbon harness thru slot.Position touch pad on top cover.

InstallationEquipment AlertBe sure the arrow on the display panelpoints UP when installing panel.

Step 2: Slide display panel under tab.Install two screws

InstallationStep 3: Connect ribbon harnesses

to display panel (J2 & J3).

Tab


ALL


B-39Models:


Door Motor System

Door Motor System

Location & Function

At the end of the Sterilizing Mode...When the pressure in the chamber drops to 0.7 psi (5 kPa),the PC board bypasses the motor switch and supplies linevoltage to the door motor. The door motor rotates the camcausing the motor switch to close. Now, the current to the doormotor flows thru the motor switch. As the cam rotates, theconnector rod causes the latch lever to open the door.

When the cam reaches the bottom of its travel, the motorreverses direction. When the

Autoclave - Midmark - M11 - Manual de Servicio y Partes

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