3M Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair Manual Health Care
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Steri-Vac 8XL Gas Sterilizer/Aerator Table of Contents 3M 1997 April i Safety Notices ........................................................................................................................... 1 Introduction Steri-Vac 8XL Sterilizer Modes of Operation ........................................................... 3 Methods of Selecting Modes and Options ................................................................. 3 Steri-Vac 8XL Sterilizer Modes Menu Structure ....................................................... 4 Printed Sterilization Reports ...................................................................................... 5 Normal Operating Mode ............................................................................................ 7 Setup Service Mode .............................................................................................................. 9 Site Setup ................................................................................................................... 11 Modifying Site Setup ............................................................................................ 12 Date Format, Time Format, Date, and Time ........................................................ 13 Daylight Savings Time (DST) .............................................................................. 15 Owner Name ........................................................................................................ 16 User Codes (Option) ............................................................................................. 17 Printer Type .......................................................................................................... 18 Remote ................................................................................................................. 19 Language ............................................................................................................... 20 Critical Options .................................................................................................... 21 Checkout Service ........................................................................................................................ 22 Calibration ............................................................................................................ 23 Temperature Calibration (Automatic) .................................................................. 24 Temperature Calibration (Individually Selected) ................................................. 25 Pressure Calibration ............................................................................................. 26 RH Calibration ..................................................................................................... 27 Vacuum Test .............................................................................................................. 28 Switch Test ................................................................................................................. 32 Video Test .................................................................................................................. 33 Print Sterilizer Setup and Trend Information ............................................................. 35 Demo Demo Mode ................................................................................................................ 39
Table of Contents Steri-Vac 8XL Gas Sterilizer/Aerator ii 3M 1997 April Troubleshooting and Repair Help Window ............................................................................................................. 41 Solenoid Test .............................................................................................................. 42 DIP Switch Selectable Service Mode Options ........................................................... 45 Final Vacuum ....................................................................................................... 45 Emergency Aeration ............................................................................................. 45 System Reset Mode Reset Cycle to Idle ................................................................................................ 46 Clear Silent Abort ................................................................................................. 47 Reset Site Setup .................................................................................................... 48 Error Code Flow Description ..................................................................................... 49 Error Code Listing ...................................................................................................... 50 Error Code Failure Analysis ....................................................................................... 54 Special Cycles Emergency Aeration (from Normal Mode) ................................................................ 83 Accelerate Cycle Time ............................................................................................... 84 Simulate Low Pressure ............................................................................................... 85 Define Cycles ............................................................................................................... 86 Temperature, Preheat Option ..................................................................................... 87 Vacuum, Humidity Option........................................................................................... 88 Exposure, Aeration Option ......................................................................................... 89 Parts Listing Parts Diagrams and Listings ....................................................................................... 91 Schematics 5 Volt Power Supply .................................................................................................. 129 24 Volt Power Supply ................................................................................................ 130 Overall Machine Schematic ....................................................................................... 131 Controller ................................................................................................................... 133 MCU Circuit ............................................................................................................... 135 Process Control Input Circuit ..................................................................................... 137 Process Control Output Circuit .................................................................................. 139 Video Circuit .............................................................................................................. 141 Peripheral Circuits ...................................................................................................... 143 Keypad Interface Display Board ................................................................................ 145 Sterilizer Operational Flow Diagram ......................................................................... 147
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SAFETY NOTICES 3M 1997 April 1 WARNING Hazardous Voltage Use care when setting the DIP switches with power applied to the Steri-Vac 8XL Sterilizer. This machine contains HIGH VOLTAGES. Failure to observe use care can result in electrical shock or injury to personnel, including death. CAUTION Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SAFETY NOTICES 2 3M 2004 October 3M Steri-Gas EO Cartridge 8-170 Label
Steri-Vac Gas Sterilizer/Aerator Model 8XL Service and Repair INTRODUCTION 3M 1997 April 3 Steri-Vac 8XL Sterilizer Modes of Operation The Steri-Vac 8XL Sterilizer provides four modes of operation. Normal Mode - The sterilizer is operated in Normal Mode when performing routine sterilization operations. The procedure on page 6 provides instructions on placing the sterilizer in Normal Mode. For detailed instructions on operating the sterilizer in Normal Mode see the Operator’s Manual. Service Mode - The Service Mode is used to: • Set up the sterilizer when it is initially installed, or when there is a change to the setup information. Critical options are set during setup. • Check out the sterilizer when it is initially installed or if a problem is encountered during operation. Checkout provides instructions for the Calibration of temperature, pressure, and RH sensors; vacuum test, switch test, and video test; and printing setup and trend information. • Troubleshoot various sterilizer problems by running selected stages of a sterilization cycle and printing trend reports for analyzing failures. Additionally, troubleshooting includes error analysis and error clearing procedures. Detailed Service procedures start on page 7. Demo Mode - The Sterilizer Demo Mode provides a graphic simulation of a sterilization cycle. This mode can be used for familiarization or training purposes. See page 37 for instructions on entering the demo mode. System Reset Mode - The System Reset Mode has three options and is only available for use by a qualified service technician. Refer to page 46 for a detailed description of the System Reset Mode options. Note: A service representative access code is encoded in the software to prevent unauthorized access to some options. The access code is provided to the service representative upon request. Methods of Selecting Modes and Options There are two methods of selecting Steri-Vac 8XL Sterilizer modes and options. The modes are selected by setting DIP switches, specifically SW1 switches 7 and 8. The options available in the modes are either selected with a softkey or by configuring SW1 switches 1-6. Softkey selections are evident when described in the procedures. DIP switch settings are described and a picture is provided to show the switch positions. Figure 1 shows the relationship between the positions of the configuration switches on SW1 or SW2 and the configuration tables used in the procedures. The arrows correspond to the following: ↑ Closed, ↓ Open. Figure 2 shows the Steri-Vac 8XL Sterilizer Controller Card configuration switch, test point, and connector locations. 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Service Mode Figure 1. Example of DIP Switch Positions and Configuration Table Listing. Figure 2. Steri-Vac 8XL Sterilizer Controller Card Configuration Switch, Test Point, and Connector Layout. SW1 SW2
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SAFETY NOTICES 4 3M 2004 October Steri-Vac 8XL Sterilizer Modes Menu Structure Modes (SW1 DIP switch selectable) Normal Service Demo System Reset See Operator’s Manual SETUP DATE/TIME DST EMERGENCY AERATION OWNERS NAME PRINT INFO (Setup and Trend) USER CODES SERVICE SET CYCLES PRINTER REMOTE LANGUAGE CALIBRATE SENSOR CAL. TEMPS PRESSURE RH VACUUM TEST DEADEND TEST PUMP TEST LEAK TEST (Low pressure) LEAK TEST (High Pressure) SWITCH TEST SOLENOID TEST Video test * Final Vacuum * Emergency Aeration * Clear EEPROM * * SW1 DIP Switch Selectable Steri-Vac performs a graphic simulation of a sterilization cycle. RESET CYCLE TO IDLE CLEAR SILENT ABORT RESET SITE SETUP
Steri-Vac Gas Sterilizer/Aerator Model 8XL Service and Repair INTRODUCTION 3M 1997 April 5 Printed Sterilization Reports The Steri-Vac 8XL Sterilizer can be configured with an installed printer, an external printer, or no printer. When a printer is connected to the sterilizer, the printer is used for printing a graphical representation of each sterilization cycle, for printing all of the errors encountered during the cycle, and for printing setup and trend information. An attached printer is initialized when the sterilizer is powered on. The sterilization cycle report is printed from the time the cycle begins, until the Locked Aeration stage begins (see Figure 3). If the error is discovered during the sterilization cycle, the error is printed at the place in the sterilization report where the error was encountered. If report printing is interrupted because of an out-of-paper condition, the printing will continue once new paper is loaded and the printer initializes. Note: An error or caution message is only printed once. Figure 3 is an example of a printed sterilization report with a cycle temperature of 55ºC. Figure 3 also indicates the stages of the sterilization cycle and labels the signals printed on a report. Figure 3. Sterilization Cycle Report with a Cycle Temperature of 55ºC.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator INTRODUCTION 6 3M 2004 October
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 7 Normal Operating Mode Normal sterilization cycles are performed when SW1 switches 7 and 8 are configured (open) for Normal Mode as shown in Figure 4. When the Steri-Vac 8XL Sterilizer is powered up with SW1 configured for Normal Mode (SW1 switches 7 and 8 open), switches 1-6 can be set in any of the following combinations to give the options listed below and shown in Figure 5. These options are selected when performing various service actions. Note: If SW1 switches 7 and 8 are not in Normal operating mode, the function of switches 1-6 change significantly. See Service Mode on page 9. Selectable options for Normal Mode are: Simulate Low Pressure Software ignores most pump downs (see page 85). Accelerate Time Accelerates some cycle times by 60 (see page 84). Note: Screen times are not accelerated. Help Window Displays a help window containing system information. This screen shows temperature sensor values, door status, handle status, timer, etc. Half Gas Expose Cycle Shortens gas expose cycle for testing. Air Injection During Precondition Forces air into chamber during humidification. This option is designed for specialized testing and not intended as a normal service tool. Full Strip Chart Plots heater sensors (end, middle, and heatsink), calibration temperature (47.5°), and RH (throughout precondition), in addition to normally plotted parameters. 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Normal Mode Figure 4. Normal Operating Mode. 1 2 3 4 5 6 7 8 SW1 DIP Switch #'s ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ NORMAL MODE ↑ ↓ ↓ Simulate Low Pressure ↑ ↓ ↓ Accelerate Time ↑ ↓ ↓ Help Window ↑ ↓ ↓ Half Gas Cycle ↑ ↓ ↓ Air Injection ↑ ↓ ↓ Full Strip Chart Figure 5. Normal Operating Mode Options.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 8 3M 2004 October To select the Normal Mode of Operation: 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Set SW1 configuration switches 7 and 8 to the open position. 3. Set SW1 configuration switches 1 - 6 for the desired options as shown in Figure 5 on page 7. 4. Set Critical Options (see page 21). 5. Power On the Steri-Vac 8XL Sterilizer. 6. On initial installation or when the sterilizer is powered On with User Access Codes enabled the display in Figure 6 is shown and a User Access Code has to be entered to operate the sterilizer. After entering the User Access Code the display in Figure 7 is shown. 7. Operate the sterilizer in Normal Mode as outlined in the Operator’s Manual. Note: On initial installation or after the system defaults the Supervisor’s Setup Code is 1234. Figure 6. Normal Operating Mode Display with User Access Codes Option Enabled. Figure 7. Normal Operating Mode Display after User Access Codes Entered.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 9 Service Mode Configuration and testing of the Steri-Vac 8XL Sterilizer can be performed when SW1 switches 7 and 8 are configured (closed) for Service Mode as shown in Figure 8. When the sterilizer is powered up with SW1 configured for Service Mode (SW1 switches 1-6 open and switches 7 and 8 closed), the following sterilizer Setup selections are available through displayed softkeys. Site Setup page 11 Vacuum Test page 29 Switch Test page 33 Solenoid Test page 42 Other Service Mode options are available by configuring SW1 switches 1-6 as show in Figure 9. Final Vacuum page 9 Emergency Aeration page 9 Note: Emergency Aeration is also selectable directly from Normal Mode by using the procedure on page 83. Trends page 37 Video Test page 34 To Select the Service Mode of Operation: 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Set SW1 configuration switches 7 and 8 to the closed position. 3. If one of the DIP switch selectable options is desired, set SW1 configuration switches 1-6 for the desired option as shown in Figure 9. 4. Set Critical Options (see page 21). 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Service Mode Figure 8. Service Mode. 1 2 3 4 5 6 7 8 SW1 DIP Switch #'s ↓ ↓ ↓ ↓ ↓ ↓ ↑ ↑ Service Mode ↓ ↓ ↓ ↓ ↓ ↑ ↑ ↑ Final Vacuum ↓ ↓ ↓ ↓ ↑ ↓ ↑ ↑ Unused ↓ ↓ ↓ ↑ ↓ ↓ ↑ ↑ Emergency Aeration ↓ ↑ ↓ ↓ ↓ ↓ ↑ ↑ Trends ↑ ↓ ↓ ↓ ↓ ↓ ↑ ↑ Video Test Figure 9. Service Mode Options. Figure 10. Service Menu Display.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 10 3M 2004 October DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 5. Power On the sterilizer. 6. If gas is in the chamber or the Gas Present LED on the Controller circuit board is On (see Figure 2), the Service mode is not entered and the message Press Stop to Clear Abort is displayed, do one of the following: a. If you want to finish the current sterilization cycle, power off the sterilizer, set SW1 switches for Normal Mode, then power up the sterilizer and it will complete the cycle. b. If you want to end the current sterilization cycle, press the Stop button. The sterilizer will sequence through final vacuum, purge, and mandatory aeration. DANGER Use care when setting the DIP switches with power applied to the Steri-Vac 8XL Sterilizer. This machine contains HIGH VOLTAGES. Failure to observe use care can result in electrical shock or injury to personnel, including death. 7. The Service Menu displays. If options were selected by setting SW1 configuration switches 1-6 in Step 3, after the selected option starts, set those switches to the open position as shown in Figure 8. 8. If no options were selected in Step 3, go to the appropriate Service Mode procedure to continue.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 11 Site Setup The Site Setup option is menu driven. Four softkeys on the right side of the display enable the service representative to choose options from a selection list. When the desired option in the selection list is highlighted, pressing Select softkey either selects the option (or de-selects items already selected) or displays a sub-menu of options corresponding to the selection. Following is the list of softkeys, which are used to perform Site Setup. Up Moves highlight up the selection list. Down Moves highlight down the selection list. Select Selects the current highlighted option on the selection list. In some cases this will display another sub-menu of options. Done Displays the previous menu. Note: A highlighted menu item is not selected unless the Select softkey is pressed. If the Done softkey is pressed before a highlighted menu item is selected, the display returns to the previous menu and the highlighted item is not selected. The Site Setup option allows the service representative to permanently setup the following options for the Steri-Vac 8XL Sterilizer: • Date Format, Time Format, Date, and Time • Daylight Savings Time (DST) • Aeration (Locked) • Emergency Aeration • Print Information • User Codes Option • Owner Name • Service Note: The modified options are permanently stored in the controller when the Done softkey is pressed in the Site Setup menu. If the sterilizer’s power is turned Off before the Done softkey is pressed, an E2 error will occur the next time the sterilizer’s power is turned On. All the Site Setup information will be lost and have to be re-entered. Figure 11. Site Setup Display. Site Setup Option Default Value Date Format MM/DD/YY Time Format 23:59 Date January 1, 1995 Time 00:00 Daylight Savings Time (DST) OFF User Codes OFF Owner <blank> Install Number 1 Aeration (Locked) Read from Critical Options Dip Switch, see Critical Options on page 20. Temp Cycles 37°C For 3 Hours 55°C For 1 Hour Printer Seiko Remote None Preheat None Punct. Press. 160 mBars
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 12 3M 2004 October Modifying Site Setup 1. Place the Steri-Vac 8XL Sterilizer in the Service Mode (see page 9). 2. Press Site Setup softkey. The Site Setup menu is displayed. 3. Perform the necessary operations from the following procedures to enter the site setup information into the sterilizer. Note: Make sure the following step is accomplished before exiting Site Setup, otherwise all setup information will be lost. 4. After all site information is entered, press the Done softkey to store the information in the sterilizer’s controller. Figure 12. Service Menu Display. Figure 13. Site Setup Display.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 13 Date Format, Time Format, Date, and Time 1. Using the Up and Down softkeys, highlight the DATE/TIME option on the Site Setup menu. 2. Press the Select softkey. 3. The Date Format menu is displayed. Using the Up and Down softkeys, highlight the desired Date format. 4. Press the Select softkey. 5. The Time Format menu is displayed. Using the Up and Down softkeys, highlight the desired Time format. 6. Press the Select softkey.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 14 3M 2004 October Date format, Time Format, Date, and Time - Cont. 7. Using the Month Up and Month Down softkeys, set the current date. Note: The day of the week is automatically updated each time the date changes. 8. Press the Save Date softkey when current date is set. 9. Using the Hours Up softkey, set the current hour. 10. Using the Minute Up and Minute Down softkeys, set the current minute. 11. Press the Save Time softkey when current time is set. 12. The display shows the Site Setup Menu. Note: The date and time are displayed to the right of DATE/TIME on the Main menu. When the sterilization cycle is started and a printer is available, the date and time (in their respective formats) are printed on the final printout.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 15 Daylight Savings Time (DST) This option adjusts the time for Daylight Savings Time (DST). When DST is toggled from Off to On, one hour is added to the sterilizer internal clock time. When DST is toggled from On to Off, one hour is subtracted from the sterilizer internal clock time. 1. Using the Up and Down softkeys, highlight the DST option on the Site Setup menu. 2. Press the Select softkey to toggle DST from ON to OFF or from OFF to ON.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 16 3M 2004 October Owner Name This option is for entering an owner (institutional, corporation, supervisor) name. 1. Using the Up and Down softkeys, highlight the OWNER NAME option on the Site Setup menu. 2. Press the Select softkey. Note: In the following step the last (highlighted) character is not included in the Name. Only the unhighlighted text is saved as the owner name. Up to two lines of text can be entered. 3. Using the Up and Down softkeys, select the first letter of the name to be entered, then press the Select softkey. Continue until the name is complete. Pressing the Stop button erases the last letter entered. 4. When the name is completely entered, press the Done softkey. 5. The display shows the OWNER name and STERIVAC NUMBER. The sterilizer number can now be selected. This number is used for multiple Steri-Vac 8XL Sterilizer installations using a remote display. All sterilizers connected to a single remote display must have unique sterilizer installation numbers. If this is a single installation without a remote display, select NONE. 6. Using the Up and Down softkeys, change the STERIVAC NUMBER. 7. Press the Select softkey.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 17 User Codes (Option) If the User Codes option was purchased with this sterilizer, the User Codes setup instructions are contained in SteriVac 8XL Gas Sterilizer/Aerator, User Access Codes Setup, Service Manual Supplement, a separate supplement to the Service Manual. If you have purchased this option and did not receive the Service Manual supplement, contact your 3M representative.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 18 3M 2004 October Printer Type The Steri-Vac 8XL Sterilizer can be set up with an internal or external printer, or no printer. 1. If the Misc. Service menu is not already displayed, use the Up and Down softkeys to highlight the SERVICE option on the Site Setup menu. 2. Press the Select softkey. 3. Using the Up and Down softkeys, highlight the PRINTER option on the Misc. Service menu. 4. Press the Select softkey. 5. Using the Up and Down softkeys, select the type of printer connected to the sterilizer. 6. Press the Select softkey. The Misc. Service display shows the selected printer.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 19 Remote The Steri-Vac 8XL Sterilizer can be operated at the display panel on the front of the unit or from a remote display panel. Remote is used when one or more sterilizers are connected to a remote control/display panel. 1. If the Misc. Service menu is not already displayed, use the Up and Down softkeys to highlight the SERVICE option on the Site Setup menu. 2. Press the Select softkey. 3. Using the Up and Down softkeys, highlight the REMOTE option on the Misc. Service menu. 4. Press the Select softkey. 5. Using the Up and Down softkeys, highlight the applicable remote display option. 6. Press the Select softkey. The Misc. Service display shows the selected option.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator SETUP 20 3M 2004 October Language 1. Press the Select softkey. The Language display shows the selected options.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair SETUP 3M 1997 April 21 Critical Options The AUX DIP switch (SW2) is a hardware setup for system configuration (see Figure 14). Note: The SW2 (Critical Options) switches must be set before entering Normal Mode. If software failures occur, this DIP switch corresponds to the system installation settings that were active before the failure. The following are read at power up: • Abator Type • Two Door System The following are continuously monitored: • Electric Pump • Access Codes • Nitrogen Injection The following are read at Reset Site Setup • Locked Aeration To set the AUX DIP switch SW2 switches: 1. Make sure the Steri-Vac 8XL Sterilizer is powered Off. 2. Set SW2 configuration switches 1-6 to correspond to the sterilizer configuration requirements (see Figure 15 for and example of switch settings). 3. Set SW2 configuration switches 7 and 8 to the desired locked aeration time. 4. Set SW1 configuration switches for the desired mode of operation or as directed in service or operational procedures. 5. Power On the Steri-Vac 8XL Sterilizer. 1 2 3 4 5 6 7 8 SW2 DIP Switch #'s ↑ Electric pump ↓ Access Codes Disabled ↓ ↓ No Abator Connected ↓ ↑ 50 CFM Abator ↑ ↓ 50 CFM Abator w/Aeration ↑ Two Door System ↑ Nitrogen Injection ↓ ↓ No locked aeration ↓ ↑ Locked Aeration 3 hours ↑ ↓ Leak test off Figure 14. Critical Options. 1 2 3 4 5 6 7 8 SW2 Dip Switch #s Switch settings Figure 15. Example of selected Critical Options set on SW2 DIP switch. Locked Aeration Leak test on Nitrogen Injection Single door system 50 CFM abator Access codes disabled Electric Pump
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Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 23 Service Selecting Service on the Site Setup menu displays the Misc. Service menu with the following options: Option When Selected Temperature Cycles and Gas Expose Duration Special cycle applications Printer Type Selected during Setup Remote Selected during Setup Preheat Option Special cycle applications Gas Cartridge Puncture Pressure Special cycle applications Calibration Performed during Checkout To display the Misc. Service menu, do the following: 1. Using the Up and Down softkeys, highlight the SERVICE option on the Site Setup menu. 2. Press the Select softkey. The Misc. Service menu displays.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 24 3M 2004 October Calibration The Calibration mode allows the permanent calibration of the following sensors: • Heatsink Temperature • Display Temperature • End Temperature • Middle Temperature • Chamber Pressure • Chamber Relative Humidity Note: The Master Access Code is required to gain access to the Calibration menus. 1. If the Misc. Service menu is not already displayed, see page 21 to display the Misc. Service menu. 2. Using the Up and Down softkeys, highlight the CALIBRATE option on the Misc Service menu. 3. Press the Select softkey. 4. Using the number softkeys, enter the Master Access Code. After entering the correct Master Access Code the Sensor Calibration menu appears with the following selection list: • Temps • Pressure • RH
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 25 Temperature Calibration (Automatic) Automatic Temperature Conditioning Circuit Calibration (Auto Cal) should be performed first, then, if necessary, the individual temperature sensors can be adjusted. The temperature conditioning circuit contains a precision resistor calibrated to 47.5°C. The software calibrates the conditioning circuit (not each individual sensor). The equations for determining the actual temperature are adjusted according to the value read from the calibration resistor. 1. Using the Up and Down softkeys, highlight TEMPS on the Sensor Calibration menu. 2. Press the Select softkey. 3. Using the Up and Down softkeys, highlight the AUTO CAL on the Temp Calibration menu. 4. Press the Select softkey. Auto calibration is performed. Notes: The Help window (page 41) can be viewed to check calibration. Calibration (CAL) should be 47.5º ±.5º. Each temperature sensor can be calibrated independently of the others. This is only required if temperature problems occur, such as the middle of the chamber is too hot or too cold as compared with the end temperatures. Normally individual calibration does not need to be performed. 5. If none of the temperature sensors require individual calibration, press the Done softkey and the Sensor Calibration menu is displayed. Otherwise continue with the next procedure.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 26 3M 2004 October Temperature Calibration (Individually Selected) Note: Make sure Automatic Temperature Calibration on page 25 is performed before performing this procedure. 1. Using the Up and Down softkeys, highlight one of the temperature sensors. • Heatsink • Display • End • Middle 2. Press the Select softkey. A highlighted box is shown at the top of the display with a message similar to: Operate 0.0°C Cooler=xx.xxºC. Note: In the following step, pressing the Up softkey will increase the C reading by about .5°C. The display will show Operate 0.5°C Warmer and the selected sensor will operate hotter by 0.5°C. Pressing the Down softkey will decrease the C reading by about .5°C. The display will show Operate 0.5°C Cooler and the selected sensor will operate cooler by 0.5°C. These changes are saved until an Auto Cal is performed. 3. Using the Up and Down softkeys, set the sensor calibration value as required. 4. Press the Select softkey to set the sensor calibration value and return to the Temp Calibration menu. 5. Repeat steps 1-4 for additional temperature sensors requiring individual calibration. 6. When temperature calibration is complete, press the Done softkey. The Sensor Calibration menu is displayed. Note: If C12 occurs at the start of a cycle and calibration is performed, only none-manually adjusted sensors are calibrated.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 27 Pressure Calibration This calibration procedure calibrates the sterilizer pressure sensor to ambient pressure with the sterilizer door open. 1. If the Sensor Calibration menu is not already displayed, see page 24 to display the menu. 2. Using the Up and Down softkeys, highlight PRESSURE on the Sensor Calibration menu. 3. Make sure the sterilizer door is open. Note: When performing pressure calibration the sterilizer door must be open. 4. Press the Select softkey. A highlighted box is shown at the top of the display with a message similar to: Operate 0.0 mBar Lower=xx.xx (xx.xx = the current reading). Note: In the following step, pressing the Up softkey will increase the mBar reading by about 5 mBars. The display will show Operate 5 mBar Higher and the selected sensor will operate 5 mBar higher than normal. Pressing the Down softkey will decrease the mBar reading by about 5 mBars. The display will show Operate 5 mBar Lower and the selected sensor will operate 5 mBar lower than normal. 5. Using the Up and Down softkeys, set the sensor pressure calibration value as required. 6. Press the Select softkey to set the pressure calibration value. The Sensor Calibration menu is displayed.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 28 3M 2004 October RH Calibration 1. If the Sensor Calibration menu is not already displayed, see page 24 to display the menu. 2. Using the Up and Down softkeys, highlight RH on the Sensor Calibration menu. 3. Press the Select softkey. The RH display allows the HyCal sensor set points to be adjusted. Note: The Steri-Vac 8XL Sterilizer should be supplied with the HyCal Engineering Data Sheet. Near the bottom of this supplied sheet two set points are given, 0% rh = some voltage and 75.3% rh = some voltage. These voltages are the set points which need to be entered for the RH sensor. The current set points are displayed on the screen. A small circle (o ) to the left of each set point indicates the set point has been changed. A dash (-) indicates the set point has not been changed. Humidity errors may occur during normal operating mode if the values are not set. 4. Using the Up and Down softkeys, change the set points to the required settings. 5. Press the Select softkey. After the last set point is entered and selected, the Sensor Calibration menu is displayed. 6. Press the Done softkey. The Misc. Service menu is displayed.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 29 Vacuum Test Vacuum Test is selected from the main Service Menu and tests the sterilizer vacuum system and chamber leakage. This test is nearly automatic. 1. Place the Steri-Vac 8XL Sterilizer in the Service Mode (see page 9). 2. On the Service menu press Vacuum Test softkey. The initial vacuum test display is shown. DANGER Use care when setting the DIP switches with power applied to the Steri-Vac 8XL Sterilizer. This machine contains HIGH VOLTAGES. Failure to observe use care can result in electrical shock or injury to personnel, including death. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 3. Open the sterilizer door. 4. Press the Start Vacuum softkey. 5. Install the Dead End Vacuum tester
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 30 3M 2004 October 6. When the pressure reading stabilizes at the lowest value, press the Stop Vacuum softkey. Note: A Dead End pressure greater than 120 mBars will cause a Vacuum Test failure. 7. Remove the Dead End Vacuum tester. Note: If the sterilizer door is already closed, the message Close Door will not be displayed. 8. Make sure the sterilizer door is closed and press the Start softkey.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 31 9. The pump and leak tests are automatic. The following operations are performed during these tests. Note: Pressing the Abort softkey will stop the current test. Pump Test When the vacuum level is reached, Vacuum Test automatically advances to Low Pressure Leak Test. Note: A pump down time of more than 18 minutes will cause a Vacuum Test failure. Low Pressure Leak Test (10 minutes) After 10 minutes the Vacuum Test automatically advances to High Pressure Leak Test. Notes: A Low Pressure Leak Test of more than 15 mBar positive pressure change causes a Vacuum Test failure. A negative reading indicates a decrease in chamber pressure. A negative reading will not cause causes a Vacuum Test failure.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 32 3M 2004 October High Pressure Leak Test (10 minutes) After 10 minutes the Vacuum Test displays the results of the test, either Passed or Failed. Note: More than 15 mBar positive pressure change will cause a Vacuum Test failure. 10. Press the Print softkey. If a printer is installed or connected and setup (See Site Setup on page 11), the Vacuum test final display (as shown to the right) will be printed. Note: The top right corner of the printout will show the test results. If a fault occurred, the clock time on the report for the test will be reversed (black with white numbers) and the test results will show Failed. Otherwise the test results will show Passed.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 33 Switch Test The Switch Test is used to verify selected Steri-Vac 8XL Sterilizer switches change their state of operation when actuated during this test. 1. Place the Steri-Vac 8XL Sterilizer in the Service Mode (see page 9). 2. On the Service menu press Switch Test softkey. A Switch Test menu is displayed listing all the sterilizer switches that are testable. DANGER Use care when setting the DIP switches with power applied to the Steri-Vac 8XL Sterilizer. This machine contains HIGH VOLTAGES. Failure to observe use care can result in electrical shock or injury to personnel, including death. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 3. To test the operation of a switch actuate the selected switch and observe the Switch Test display. If the switch is operating correctly, the switch name will be highlighted on the display when the state of the switch is changed. 4. To end the switch test, set SW1 configuration switches to the Normal Operating Mode (all switches Open, see page 7). This signals the software the Switch Test is complete. At the end of the test a printed copy of the Switch Test display is printed on the sterilizer’s printer and the Service Menu appears. Note: If other tests are to be performed, the SW1 configuration switches need to be set to the Service mode. Switch Key: LD Load Door UD Unload Door Comp Air Compressed Air Cartridge Gas cartridge position Switch Test TO QUIT, PLACE SW1 ALL OPEN LD Handle Air Flow LD Latch Water Low LD Open Nitro Low UD Handle Abator Rdy. UD Latch Abator Fail UD Open Stop Comp. Air Key 1 Cartridge Key 2 Printer On Key 3 Puncture Pin Key 4 External Signals Front Panel Softkeys } }
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 34 3M 2004 October Video Test The Video test is a Service Mode operation to test the ability of the Steri-Vac 8XL Sterilizer display to display all pixels On, to display vertical lines, and to display horizontal lines. 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Set SW1 configuration switches 7 and 8 to the closed position (see Figure 16). 3. Set SW1 configuration switch 1 closed and switches 2-6 open (see Figure 16). 4. Power On the Steri-Vac 8XL Sterilizer. 5. The first Video Test display shows with all pixels On. Press any key to advance to the next screen. 6. The second Video Test display shows vertical lines. Press any key to advance to the next screen. 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Video Test Figure 16. Video Test Switch Positions.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 35 7. The third Video Test display shows horizontal and vertical lines. Press any key to display the Service Mode menu. 8. If additional Service Mode operations are to be performed, make sure SW1 configuration switches are placed in the correct position for the procedure to be performed.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator CHECKOUT 36 3M 2004 October Print Sterilizer Setup and Trend Information This option prints critical options, setup/calibration information, and Trend Analysis information. The printout can be used to verify proper system configuration. Note: This procedure should only be used after all other Site Setup procedures are done. This will ensure all printed information is complete for the current Site Setup. 1. Make sure the printer is selected and printer power is On. 2. If the Steri-Vac 8XL Sterilizer is not in the Service Mode, go to page 9 and place the sterilizer in the Service Mode. 3. If the Site Setup menu is not displayed, press the Site Setup softkey on the Service menu. 4. Using the Up and Down softkeys, highlight the PRT INFO option on the Site Setup menu. 5. Press the Select softkey. The sterilizer printer prints the critical options, setup/calibration, and trend analysis information. See the following page for a sample printout.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair CHECKOUT 3M 1997 April 37 Figure 17. Sterilizer Setup and Trend Information Printout. Abbreviations used on the Setup and Trend Analysis printout. CY Cycle Number CT Cycle Temperature selected ST Temperature of chamber at start (C°) PT Pump down time (seconds) CL Chamber Leak (mBars) Note: A positive CL number indicates a leak into the chamber. NI Number of injections RH Final Humidity before puncture (%RH) PP Pressure at puncture (mBar) FV Final Vacuum pumpdown time (seconds) not displayed on screen.
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Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair DEMO 3M 1997 April 39 Demo Mode The Demo mode performs a graphic simulation of a sterilization cycle. The Stop button operates as a pause key during the Demo mode. The Demo takes about 3-4 minutes. To place the Steri-Vac 8XL Sterilizer in the Demo mode of operation: 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Open SW1 configuration switches 1 - 6 as shown in Figure 18. 3. Set SW1 configuration switches 7 and 8 to the positions shown in Figure 18. 4. Power On the Steri-Vac 8XL Sterilizer. Note: The only error code check during Demo mode is for E14, Load Door Open. 5. The sterilizer performs a graphic simulation of a sterilization cycle. Note: Pressing the Stop button pauses the Demo mode. To resume Demo mode press the Stop button again. 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Demo Mode Figure 18. Demo Mode. Figure 19. Normal Operating Mode Graphic Simulation during Demo Mode.
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Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair TROUBLESHOOTING AND REPAIR 3M 1997 April 41 Help Window The Help Window displays the current status of Steri-Vac 8XL Sterilizer switches and settings and can be accessed in any mode at any time. 1. Place SW1 switch 3 in the Closed position to display the Help Window. 2. Place SW1 switch 3 in the Open position to hide the Help Window. CHBR Chamber Temperature, measured in °C. Second parameter is digital value as read by A/D Converter. END End Temperature, measured in °C. MID Middle Temperature, measured in °C. AMB Ambient Temperature, measured in °C. CAL Calibration Resistor Temperature, measured in °C. HSK Heatsink Temperature, measured in °C. RHT Relative Humidity Chamber Temperature, measured in °C, Second character - or o indicateS if RH Solenoid is closed (-) or open (o). VAC Chamber Pressure, measured in mBar. AMB Ambient Pressure, measured in mBar. REF Voltage Reference, measured in Volts. RH Relative Humidity, measured in %RH. CNT Cycle Count. STG Stage of current cycle, IDLE, START, PRECON, GAS INJ, GAS EXP, FNL VAC, PURGE, LOCKAER, UNLOCK. MODE Displays current operating mode, NORMAL, RESET, SERVICE, or DEMO. PUMPTIME Electric Pump Time, Shows amount of time remaining before the electric pump turns off (OFF IN XXX SEC), or displays ON. Must be setup in Critical Options. RH L/RHH RH Voltage set points, Low and High, measured in Volts. If RH Set point not entered, “NA will be displayed. LAST SW * Shows numbers representing active switches, see below for explanation of each switch. CAUTIONS Displays last four caution numbers, latest caution is leftmost digit. ERRORS Displays last four error numbers, latest error is leftmost digit. TIMER Displays timers value in seconds (not always applicable). HEATERS Displays a E ON if the end heaters are on, otherwise E OFF. Displays a M ON if the middle heaters are on, otherwise M OFF. HEATSINK Displays ON if heatsink is being heated, otherwise OFF. STG START Display the time at which the current stage started. STG CURR Displays the current time of this stage (for comparison to STG START). ABATOR Abator Name Currently installed, NONE, 50CFM AER, 50CFM, HCU. See Critical Options (page 20). AR/AF 50CFM: Displays YES/NA if abator is ready, and NO/NA if abator is still warming. REMOTE DISP Remote Display Status Help Window Section. PACKET STAT Display packet status (OK, BAD)/RS232 Hardware serial Status (OK, ERR.) Relates to Remote Display Panel. * Each number displayed after LAST SW in the help screen represents the following switch SW Switch Name Active State 1 Softkey 1 Down 2 Softkey 2 Down 3 Softkey 3 Down 4 Softkey 4 Down 5 Stop Button Down 6 Load Door Closed Closed 7 Load Door Handle Down Closed 8 Load Door Latched Closed 9 Printer off Off Position 10 Puncture Pin Up Open 11 Air Flow Failure 12 Water Low 13 Low Compressed Air 14 Cartridge Not Present 15 Latching Relay GAS Closed 16 Unload Door Closed Closed 17 Unload Door Handle Down Closed 18 Unload Door Latched Closed Note: Switches 16-18 must be set up in System Configuration Dip Switch (SW2) Critical Options, Two Door System.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator TROUBLESHOOTING AND REPAIR 42 3M 2004 October Solenoid Test The Solenoid test allows the service representative to activate/deactivate certain solenoids and heaters by DIP switch control. Note: This test is available as a system troubleshooting tool only and is not intended as a substitute for other tests described in this manual. 1. Place the Steri-Vac 8XL Sterilizer in the Service Mode (see page 9). DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. When the Service menu appears, place all SW1 and SW2 configuration switches to the CLOSED positions (see Figure 20 and 21). Note: To hide the Help screen, place SW1 switch 3 in the Open position. 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Switch settings Figure 20. SW1 Configuration Switch Positions for the Solenoid Test. 1 2 3 4 5 6 7 8 SW2 Dip Switch #s Switch settings Figure 21. SW2 Configuration Switch Positions for the Solenoid Test. Heatsink heaters Vent solenoid Door interlock RH solenid Steam injection Help window Vacuum Chamber heaters Not used Report Nitrogen injection Printer test Electric pump
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair TROUBLESHOOTING AND REPAIR 3M 1997 April 43 3. On the Service menu press Sol. Test softkey. The Solenoid Test display is shown listing all the sterilizer solenoids that are testable. Note: Information shown on the left side of the display is for hardware troubleshooting. DANGER Use care when setting the DIP switches with power applied to the Steri-Vac 8XL Sterilizer. This machine contains HIGH VOLTAGES. Failure to observe use care can result in electrical shock or injury to personnel, including death. 4. Close or open SW1 and SW2 configuration DIP switches to test specific solenoids. The solenoids are tested as shown in the tables on the following page. Notes: The Printer Test option will automatically be performed (see Figure 24). Pressing the STOP button to exit this test. 5. At the end of the Solenoid Test place SW1 and SW2 configuration switches back to their original configuration (Service Mode and Critical Options). DIP SWITCHES SW1=C0 HEX SW2 = 03 HEX CTL OUTPUTS PC01 =0 HEX PC02 = 0 HEX PC03 = 0 HEX CTL INPUTS PCI1 = F7 HEX PCI2 = 3F HEX PCI3 = FF HEX SW1 TEST OPTIONS 1 – HEATER=55C OFF 2 – VACUUM OFF 3 – HELP SCREEN 4 – STEAM 1.0 SEC 0 5 – RH SENSOR OPEN 6 – DOORS UNLOCKED 7 – VENT SW2 TEST OPTIONS 1 – ELEC PUMP 2 – PRINTER 3 – NITROGEN OFF 4 – REPORT OFF
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator TROUBLESHOOTING AND REPAIR 44 3M 2004 October SW # Description Purpose 1 Chamber Heaters Turns heaters On and Off, controls to last set temperature on main menu (Normal Operating Mode) 2 Vacuum Turns vacuum solenoid On and Off 3 Help Window Displays Help Window 4 Steam Injection Opens and automatically closes water solenoid (1 second injection) 5 RH Solenoid Opens and closes RH solenoids 6 Door Interlock Locks and unlocks load door (and unload door if equipped, see Critical Options page 21) 7 Vent Solenoid Opens and closes the vent solenoid 8 Heatsink Heater Turns on heatsink heater controls to 95 °C Figure 22. SW1 Configuration Switch Functions During Solenoid Test. SW # Description Purpose 1 Electric Pump Indicates electric pump is installed, required for vacuum (see above) 2 Printer Test If printer is installed and was setup in Site Setup, a printer test is printed (see Figure 25) 3 Nitrogen Injection Opens and closes nitrogen solenoid (if equipped, see Critical Options page 21) 4 Report Allows strip chart recorder to start, records all sensors Figure 23. SW2 Configuration Switch Functions During Solenoid Test. Figure 24. Printer Test Printout.
Steri-Vac 8XL Gas Sterilizer/Aerator Service and Repair TROUBLESHOOTING AND REPAIR 3M 1997 April 45 DIP Switch Selectable Service Mode Options Final Vacuum The Final Vacuum option automatically forces the system into final vacuum, purge, locked and unlocked aeration. 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Set SW1 configuration switches 6, 7, and 8 to the closed position (see Figure 25). 3. Set SW1 configuration switches 1-5 open (see Figure 26). 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Final Vacuum (Service Mode) Figure 25. SW1 Configuration Switch Positions for Final Vacuum. 4. Power On the Steri-Vac 8XL Sterilizer. 5. The sterilizer automatically enters into final vacuum, purge, locked and unlocked aeration. 6. After Final Vacuum starts, place switches 6, 7, and 8 to the Open position. Emergency Aeration The DIP switch selectable Emergency Aeration option is used by the service representative to automatically force the system to the aeration stage. Emergency aeration runs for the locked aeration time selected in Site Setup. 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Set SW1 configuration switches 4, 7, and 8 to the closed position (see Figure 26). 3. Set SW1 configuration switches 1-3 and 5-6 open (see Figure 27). 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Emergency Aeration (Service Mode) Figure 26. SW1 Configuration Switch Positions for Emergency Aeration. 4. Power On the Steri-Vac 8XL Sterilizer. 5. The sterilizer automatically enters the aeration stage, for the locked aeration time setup in Site Setup. 6. After Aeration starts, place switches 4, 7, and 8 to the Open position.
Service and Repair Steri-Vac 8XL Gas Sterilizer/Aerator TROUBLESHOOTING AND REPAIR 46 3M 2004 October Reset Cycle to Idle DANGER Reset Cycle to Idle should only be used by a trained 3M Service Representative and only after all other attempts to clear errors have failed. It is possible during this procedure for the sterilizer door to unlock regardless of what is in the chamber. Refer to the Ethylene Oxide Safety information at the front of this manual for the effects of EO exposure. After power is cycled in this procedure, the software requests the Master access code. If the correct code is given, the Door will UNLOCK, and the chamber will equalize regardless of what is in the chamber. 1. Power Off the Steri-Vac 8XL Sterilizer. DANGER Make sure static discharge wrist ground straps are worn when setting configuration switches or when working with the Steri-Vac 8XL Sterilizer covers removed. Static discharge will cause damage to equipment. Failure to wear static discharge straps can result in damage to equipment or injury to personnel. 2. Set SW1 configuration switches 7 to the closed position (see Figure 27). 3. Set SW1 configuration switches 1-6, and 8 open (see Figure 27). 4. Power On the sterilizer. 5. Using the number softkeys, enter the Master Access Code. After entering the correct Master Access Code one of the Normal Mode displays will appear (see page 8). 6. Set SW1 configuration switches to the Normal Mode positions (see Figure 4). 1 2 3 4 5 6 7 8 SW1 Dip Switch #s Reset Cycle to Idle (System Reset Mode) Figure 27. SW1 Configuration Switch Positions to Reset Cycle to Idle.