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Amsco Century Series Routine Maintenance

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ROUTINE MAINTENANCE
®
Amsco
®
Century
Series
Sterilizers
(05/27/05)
P129367-410
Printed in U.S.A.
© 2005, STERIS Corporation, All rights reserved.
Table of Contents
Routine Maintenance
129367-410

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  • Page 1 ROUTINE MAINTENANCE ® Amsco ® Century Series Sterilizers (05/27/05) P129367-410 Printed in U.S.A. © 2005, STERIS Corporation, All rights reserved. Table of Contents Routine Maintenance 129367-410...

  • Page 2: A Word From Steris Corporation

    A WORD FROM STERIS CORPORATION This manual contains important information on proper maintenance of this sterilizer. All operators and department heads are urged to carefully review and become familiar with the warnings, cautions, and instructions contained herein. This sterilizer is specifically designed to process goods using only the cycles as specified in this manual.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS Section Title Page A WORD FROM STERIS CORPORATION ......i LISTING OF SAFETY PRECAUTIONS ......1-1 INSTALLATION VERIFICATION ........2-1 2.1 General ..................2-1 2.2 Installation Checklist ..............2-1 2.2.1 Service Clearance .............. 2-1 2.2.2 Plumbing Service ............... 2-1 2.2.3 Electrical Service ...............

  • Page 4: Listing Of Safety Precautions

    LISTING OF SAFETY PRECAUTIONS The following list of Safety Precautions must be observed when operating or servicing this unit. WARNINGS indicate the potential for danger to personnel, and CAUTIONS indicate the potential for damage to equipment. The precautions are repeated (in whole or in part) where applicable throughout the manual. Carefully read these Safety Precautions before proceeding to use or service the unit.
  • Page 5 WARNING — STERILITY ASSURANCE HAZARD: Load sterility may be compromised if the biological air removal or air leak test indicates a potential problem. If these indicators show a potential problem, refer the situation to a qualified service technician before using the sterilizer further. According to AAMI standards, a measured leak rate greater than 1.0 mm Hg/minute indicates a problem with the sterilizer.

  • Page 6: Installation Verification

    INSTALLATION VERIFICATION An Equipment Drawing showing all utility and space requirements was 2.1 General supplied with the sterilizer. Clearance space shown on the drawing is necessary for ease of installation and to assure proper operation and mainte- nance of equipment. Installation and Uncrating Instructions were also fur- nished with the sterilizer.

  • Page 7: Electrical Service

    2.2.3 Electrical Service All disconnects must be provided with lockout capability. 120 VAC, one phase service to the unit must be as specified on the Equipment Drawing. 120 VAC, one phase service requires a clearly marked disconnect located near the sterilizer 120 VAC, one phase service should be on a separate circuit, and not tied into circuits containing large reactive loads (e.g., motors).
  • Page 8 Door Open Supply Valve Foot Century Control Pedal Touch Screen Century Sterilizer Generator Water Supply Valve Sight Optional Electric Steam Glass Generator Generator Drain Valve ® ® Figure 2-1. Typical Amsco Century Series Sterilizer Installation Verification Routine Maintenance 129367-410...

  • Page 9: Preventive Maintenance

    PREVENTIVE MAINTENANCE Maintenance procedures described in Sections 3 and 4 should be performed 3.1 Periodic regularly at the intervals indicated, using the maintenance schedule in Table 3-1 as a guide. Local conditions (water quality, usage, etc.) may require Maintenance more frequent maintenance than indicated. Refer to ILLUSTRATED PARTS Schedule BREAKDOWN publication (P129367-409) for replacement parts list.
  • Page 10 Table 3–1. Periodic Maintenance for Century Sterilizer (Cont'd) SERVICE REQUIRED BI-MONTHLY INSPECTION 4.0 MANIFOLD PIPING 4.1 Steam supply manifold — rebuild all components. 4.2 Exhaust manifold — rebuild all components. 4.3 Double door steam supply valve — rebuild all components. 4.4 Double door exhaust manifold —...
  • Page 11 Table 3–1. Periodic Maintenance for Century Sterilizer (Cont'd) SERVICE REQUIRED BI-MONTHLY INSPECTION 7.0 ELECTRIC STEAM GENERATOR (IF APPLICABLE, Cont'd) 7.9 Replace check valves. 7.10 Inspect solenoid valves for proper operation (run a cycle). 7.11 Rebuild solenoid valves. 7.12 Verify operation of safety valve. 7.13 Clean strainers 7.14 Inspect gauge glass.

  • Page 12: Daily Maintenance

    If a building steam source is not available, the sterilizer may be equipped with 3.2 Daily an electric steam generator. The generator automatically converts water to steam using electric heat. The steam created is then used to power the Maintenance sterilizer.
  • Page 13 NOTE: If generator is not at 0.0 psig, the Flush can be bypassed by pressing CANCEL, however the flush should not be bypassed on a continuous basis or else damage to the generator will occur. To ensure generator is at 0.0 psig the sterilizer can be shut off at end of the day and by next morning the unit will be able to be flushed.

  • Page 14: Clean Chamber Drain Strainer

    3.2.2 Clean Chamber IMPORTANT: The chamber drain strainer must be cleaned at least once a day, Drain Strainer preferably in the morning before running the first cycle. 1. Remove the drain strainer from the drain in the bottom of the chamber as WARNING - BURN HAZ- shown in Figure 3-2.

  • Page 15: Weekly Maintenance

    2. Wash the inside of the chamber and shelf assembly (plus any other loading CAUTION - POSSIBLE equipment) with a mild detergent solution such as STERIS Liqui-Jet 2* EQUIPMENT DAMAGE: Instrument Detergent, Criti-Klenz ® Instrument Detergent, or current STERIS Never use a wire brush, equivalent.

  • Page 16: As Required

    3.4 As Required 3.4.1 Change Printer The printer paper roll should be changed whenever a colored stripe is visible Paper Roll on one or both edges of the printout paper. Finger Cavity 2. Remove take-up spool from drive by inserting fingers in cavity as shown and 1.
  • Page 17 5. Insert new paper roll. 6. Insert end of paper into printer slot just behind ink cartridge. Paper Advances Through Printer Pull Tape Gently 7. Press PAPER FEED touch screen pad 8. Continue pressing PAPER FEED (or pull on display until paper advances through tape gently ) until about 18"...

  • Page 18: Change Printer Ink Cartridge

    Magnetic Idler 9. Rotate spool in direction shown until paper is secure. 10. Reinstall take-up spool on magnetic idler. Manually roll up slack paper. The printer ink cartridge should be changed as soon as the type on printouts 3.4.2 Change Printer is light or faded, and before printouts become difficult to read.
  • Page 19 Ribbon 3. Slip cartridge off end of paper tape, slip new cartridge over tape in the same way as before, making sure paper tape slides between ink cartridge housing and ink ribbon. 4. Install left end of cartridge first, then push right end in as shown, snapping it into place.

  • Page 20: Replace Door Seal

    3.4.3 Replace Door If the door seal requires replacement, perform the following: Seal 1. Use a tongue depressor or similar non-metal tool to pry and twist one section of the seal from the groove. Refer to Figure 3-4a. 2. Grasp the raised section of the seal and pull the remainder from the end-ring groove.
  • Page 21 Location of Reference Twist with Indicators Tongue Depressor to Pry Out Door Seal Figure 3-4a. Remove Door Seal Reference Indicator, Enlarged Location of Reference Indica- tors Rear of Location of Seal Door Seal Date Information Figure 3-4b. Location of Seal Date Information and Reference Indicators 3-13 Preventive Maintenance...

  • Page 22: Service Procedures

    SERVICE PROCEDURES The material in this section of the manual is provided to allow for servicing WARNING - BURN HAZARD: components of the sterilizer most likely to need attention. These procedures Before performing any clean- are more advance than cleaning and replacing expendables (such as printer ing or maintenance proce- paper and door seals).
  • Page 23 Figure 4-1. Serviceable Components 129367-410 Routine Maintenance Service Procedures...

  • Page 24: Steam Trap Replacement

    • • • • • Reassembly 1. Insert the screen into the strainer body. Take care that no dirt or other particles remain in the strainer body. 2. Replace and tighten hex plug. Use a new gasket if necessary. 3. Ensure all pipe connections are tight after assembly. Refer to Figure 4-1 for location.

  • Page 25: Safety Valve Test

    4.4.4 Safety Valve Test The safety valve is to be tested periodically (refer to Section 3.1, Periodic Maintenance Schedule ). This procedure can also be used test the optional integral steam generator's safety valve (if applicable). WARNING - BURN HAZ- ARD: Proper testing of the •...

  • Page 26: Operator Troubleshooting

    OPERATOR TROUBLESHOOTING This section pictorially lists and describes all the possible alarm conditions 5.1 General which may occur when operating the Amsco ® Century ® Series sterilizer. If a problem occurs that is not described in this section, please call STERIS.

  • Page 27: Typical Alarm Printout

    STATUS.. ALARM! Alarm Name TOO LONG IN CHARGE Screen Reference Current Chamber Status CHAMBER: 000.0 C 00.0 psig Number For Healthcare STERILIZER WILL: Sterilizer Activity • AUTOMATICALLY TRY TO COMPLETE CYCLE Only OPERATOR INSTRUCTIONS: 1. SILENCE ALARM 2. CHECK STEAM SUPPLY VALVE Operator Instructions →...
  • Page 28 Alarm Description Screen with Operator Instructions Too Long In Charge, STATUS.. ALARM! For Healthcare TOO LONG IN CHARGE Continued Only CHAMBER: 000.0 C 00.0 psig STERILIZER WILL: • AUTOMATICALLY TRY TO COMPLETE CYCLE OPERATOR INSTRUCTIONS: 1. SILENCE ALARM 2. CHECK STEAM SUPPLY VALVE →...
  • Page 29 Alarm Description Screen with Operator Instructions Too Long In Exhaust Occurs if chamber does STATUS.. ALARM! not exhaust to 4.0 psig TOO LONG IN EXHAUST within the allotted time. CHAMBER: 000.0 C 00.0 psig STERILIZER WILL: • AUTOMATICALLY TRY TO COMPLETE CYCLE •...
  • Page 30 Alarm Description Screen with Operator Instructions Too Long In Evacuation Occurs if chamber does STATUS.. ALARM! not reach the set TOO LONG IN EVACUATION evacuation level within CHAMBER: 000.0 C 00.0 psig the allotted time. STERILIZER WILL: • AUTOMATICALLY TRY TO COMPLETE CYCLE For Life Sciences OPERATOR INSTRUCTIONS: Only...
  • Page 31 Alarm Description Screen with Service Instructions For Healthcare Too Long In Evacuation, STATUS.. SERVICE INFORMATION: Only Continued TOO LONG IN EVACUATION → CHAMBER DID NOT REACH REQUIRED VACUUM LEVEL WITHIN ALLOTTED TIME CAUSES AND CORRECTION: WATER PRESSURE LESS THAN 30 PSIG →...
  • Page 32 Alarm Description Screen with Operator Instructions Too Long In Air Break Occurs if chamber STATUS.. ALARM! does not air break the TOO LONG IN AIR BREAK vacuum to 2.0 inHg CHAMBER: 000.0 C 00.0 psig within the allotted time. STERILIZER WILL: •...
  • Page 33 Alarm Description Screen with Operator Instructions Under Sterilize Occurs if chamber STATUS.. ALARM! Temperature temperature drops UNDER STERILIZE TEMPERATURE below sterilize CHAMBER: 000.0 C 00.0 psig temperature. STERILIZER WILL: • AUTOMATICALLY RESTART STERILIZE TIME For Life Sciences AND CONTINUE CYCLE AFTER SET TEMP.
  • Page 34 Alarm Description Screen with Service Instructions Under Sterilize NOTE: If under- STATUS.. SERVICE INFORMATION: Temperature, UNDER STERILIZE TEMPERATURE temperature value is → Continued CHAMBER TEMPERATURE DROPPED BELOW set to "RESUME", the STERILIZE TEMPERATURE BY UNDERTEMP TEMPERATURE VALUE sterilizer will auto- CAUSES AND CORRECTION: STEAM PRESSURE LESS THAN 50 PSIG matically resume...
  • Page 35 Alarm Description Screen with Service Instructions Over Sterilize For Life Sciences STATUS.. SERVICE INFORMATION: Temperature Only OVER STERILIZE TEMPERATURE → Continued STERILIZE TEMPERATURE IS ABOVE SETPOINT BY MORE THAN PRESCRIBED AMOUNT CAUSES AND CORRECTION: STEAM PRESSURE MORE THAN 50 PSIG →...
  • Page 36 Alarm Description Screen with Service Instructions Too Long In Sterilize, STATUS.. SERVICE INFORMATION: Continued TOO LONG IN STERILIZE → THE TIME SPENT IN THE STERILIZE PHASE WAS TOO LONG CAUSES AND CORRECTION: SOLENOID VALVE MALFUNCTION → REPAIR S02 SOLENOID VALVE MALFUNCTION →...
  • Page 37 Alarm Description Screen with Operator Instructions Exhaust Rate Too Fast Occurs if chamber STATUS.. ALARM! pressure is 1.0 psig EXHAUST RATE TOO FAST above the fixed rate CHAMBER: 000.0 C 00.0 psig during slow exhaust STERILIZER WILL: phase. (Sterilizers with •...
  • Page 38 Alarm Description Screen with Service Instructions Door Unsealed, For Life Sciences STATUS.. SERVICE INFORMATION: Continued Only DOOR UNSEALED → STEAM PRESSURE IN DOOR SEAL BELOW 10 PSIG CAUSES AND CORRECTION: SEAL PRESSURE SWITCH MALFUNCTION → CHECK PS1(PS2) CONNECTIONS → READJUST PS1(PS2) →...
  • Page 39 Alarm Description Screen with Service Instructions Chamber Pressure/ For Life Sciences STATUS.. SERVICE INFO: CHAMBER Temperature Failure, Only PRESSURE/TEMPERATURE FAILURE → PRESSURE OR TEMPERATURE OUTSIDE Continued NORMAL STEAM RANGE CAUSES AND CORRECTION: CONTROL OUT OF CALIBRATION → RECALIBRATE (CONTACT QUALIFIED SERVICE PERSON) TRANSDUCER, CP, MALFUNCTION →...
  • Page 40 Alarm Description Screen with Operator Instructions Reference Drain Occurs if chamber STATUS.. ALARM! REFERENCE Deviation Alarm temperature varies DRAIN DEVIATION ALARM ±2°F (1°C) from the CHAMBER: 000.0 C 00.0 psig reference temperature. REFER: 000.0 C (Lab/Sci program option STERILIZER WILL: •...
  • Page 41 Alarm Description Screen with Service Instructions Waste Temperature Probe For Life Sciences STATUS.. SERVICE INFORMATION: Failure, Only WASTE TEMP PROBE FAILURE → RTD PROBE, WT, OUTPUT IS OUTSIDE Continued NORMAL RANGE CAUSES AND CORRECTION: LOOSE CONNECTION IN PROBE WIRING → REPAIR PROBE FAILED →...

  • Page 42: Out-Of-Cycle Alarms

    The following alarm screens will appear only when the sterilizer is not 5.3 Out-of-Cycle processing a cycle. Alarms Alarm Description Screen with Operator Instructions Too Long To Close Door Occurs if door switch STATUS.. ALARM! does not make contact TOO LONG TO CLOSE DOOR within allotted time.
  • Page 43 Alarm Description Screen with Operator Instructions Too Long To Open Door Occurs if door switch STATUS.. ALARM! does not open within the TOO LONG TO OPEN DOOR allotted time. CHAMBER: 000.0 C 00.0 psig STERILIZER WILL: • REMAIN IN ALARM CONDITION UNTIL DOOR IS OPENED OPERATOR INSTRUCTIONS: 1.
  • Page 44 Alarm Description Screen with Operator Instructions Pressure In Chamber Occurs if 2.0 psig STATUS.. ALARM! pressure is sensed in PRESSURE IN CHAMBER the chamber. CHAMBER: 000.0 C 00.0 psig STERILIZER WILL: • AUTOMATICALLY EXHAUST CHAMBER TO ATMOSPHERIC PRESSURE OPERATOR INSTRUCTIONS: 1.
  • Page 45 Alarm Description Screen with Operator Instructions Waste Temperature Occurs if waste line STATUS.. ALARM! WASTE Probe Failure temperature reading is TEMPERATURE PROBE FAILURE outside the normal CHAMBER: 000.0 C 00.0 psig range. WASTE: 000.0 C STERILIZER WILL: • PREVENT NEW CYCLE FROM BEING STARTED UNTIL ALARM IS CLEARED OPERATOR INSTRUCTIONS: 1.

  • Page 46: Sensor Alarms

    The following alarm screens will appear any time the sterilizer is energized. 5.4 Sensor Alarms The sensors are continually monitored whenever the sterilizer is in or out of cycle. Alarm Description Screen with Operator Instructions Water In Chamber Occurs if excess water STATUS..
  • Page 47 Alarm Description Screen with Operator Instructions Too Long In Jacket Occurs if jacket does not STATUS.. ALARM! Charge reach set temperature TOO LONG IN JACKET CHARGE within allotted time. CHAMBER: 000.0 C 00.0 psig JACKET: 000.0 C STERILIZER WILL: • REMAIN IN ALARM CONDITION UNTIL JACKET TEMP.
  • Page 48 Alarm Description Screen with Operator Instructions Too Long To Seal Door Occurs if door seal STATUS.. ALARM! does not reach 10 psig TOO LONG TO SEAL DOOR within allotted time. CHAMBER: 000.0 C 00.0 psig STERILIZER WILL: • AUTOMATICALLY ABORT CYCLE For Life Sciences Only OPERATOR INSTRUCTIONS:...
  • Page 49 Alarm Description Screen with Service Instructions Too Long To Seal Door, For Healthcare STATUS.. SERVICE INFORMATION: Continued Only TOO LONG TO SEAL DOOR → DOOR SEAL DID NOT REACH 10 PSIG WITHIN ALLOTTED TIME CAUSES AND CORRECTION: SEAL PRESSURE SWITCH MALFUNCTION →...
  • Page 50 Alarm Description Screen with Service Instructions Too Long To Unseal For Healthcare STATUS.. SERVICE INFORMATION: Door, Continued Only TOO LONG TO UNSEAL DOOR → DOOR SEAL PRESSURE NOT BELOW 10 PSIG WITHIN ALLOTTED TIME CAUSES AND CORRECTION: SEAL PRESSURE SWITCH MALFUNCTION →...
  • Page 51 Alarm Description Screen with Service Instructions Chamber Pressure For Life Sciences STATUS.. SERVICE INFO: CHAMBER Transducer Failure, Only PRESSURE TRANSDUCER FAILURE → TRANSDUCER, CP, OUTPUT VOLTAGE IS Continued OUTSIDE NORMAL RANGE CAUSES AND CORRECTION: LOOSE CONNECTION IN TRANSDUCER WIRING → REPAIR TRANSDUCER FAILED →...
  • Page 52 Alarm Description Screen with Service Instructions Chamber Transducer For Life Sciences STATUS.. SERVICE INFORMATION: Probe Failure, Only CHAMBER TEMP PROBE FAILURE → Continued RTD PROBE, CT, OUTPUT IS OUTSIDE NORMAL RANGE CAUSES AND CORRECTION: LOOSE CONNECTION IN PROBE WIRING → REPAIR PROBE FAILED →...
  • Page 53 Alarm Description Screen with Operator Instructions Jacket Temperature Occurs if jacket tem- STATUS.. ALARM! JACKET Probe Failure perature reading is TEMPERATURE PROBE FAILURE outside the normal CHAMBER: 000.0 C 00.0 psig range. JACKET: 000.0 C STERILIZER WILL: • AUTOMATICALLY ABORT CYCLE OPERATOR INSTRUCTIONS: 1.
  • Page 54 Alarm Description Screen with Operator Instructions Door Switch Failure Occurs if door seal STATUS.. ALARM! switch contact is made DOOR SWITCH FAILURE (LS1) but door switch is still CHAMBER: 000.0 C 00.0 psig open. STERILIZER WILL: • AUTOMATICALLY ABORT CYCLE •...
  • Page 55 Alarm Description Screen with Operator Instructions Load Temperature Occurs if load tempera- STATUS.. ALARM! LOAD Probe Failure ture reading is outside TEMPERATURE PROBE FAILURE the normal range. (Lab/ CHAMBER: 000.0 C 00.0 psig Sci program option LOAD: 000.0 C only.) STERILIZER WILL: •...
  • Page 56 Alarm Description Screen with Instructions The I/O board fails to Input/Output Board #1 STATUS.. ALARM! LOAD achieve communication INPUT/OUTPUT BOARD #1 Communication Failure with board #1, #2, or #3 CHAMBER: 251.1 F 11.1 psig LOAD: 000.0 C in the control box. STERILIZER WILL: •...
  • Page 57 Alarm Description Screen with Operator Instructions Occurs if read-only ROM Failure STATUS.. ALARM! LOAD memory on the main ROM FAILURE control board fails. CHAMBER: 300.0 F 0.0 psig STERILIZER WILL: • AUTOMATICALLY ABORT CYCLE OPERATOR INSTRUCTIONS: 1. SILENCE ALARM 2. CALL SERVICE SILENCE STATUS PAPER...
  • Page 58 Alarm Description Screen with Operator Instructions Occurs if temperature Board Over Temp Failure STATUS.. ALARM! LOAD of the main control BOARD OVER TEMP FAILURE board exceeds CHAMBER: 300.0 F 0.0 psig acceptable conditions. STERILIZER WILL: • AUTOMATICALLY ABORT CYCLE OPERATOR INSTRUCTIONS: 1.

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