TECHNICIAN MANUAL Electronic Table -Top Autoclaves Model ELARA

Transcription

1 TECHNICIAN MANUAL Electronic Table -Top Autoclaves Model ELARA Cat. No. MAN EN Rev. K Tuttnauer Europe b.v., Paardeweide 36, 4824 EH, Breda, P.O. Box 7191, 4800 GD Breda, Netherlands. +31/ , Fax: +31/

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3 TABLE OF CONTENTS PARAGRAPH PAGE NO. 1 INTRODUCTION SYMBOL DESCRIPTION INSTALLATION Placing Lifting and carrying TESTS Installation Tests Periodical Tests WATER QUALITY Water for Generating Steam CONTROL SYSTEM DESCRIPTION The main board includes: The high voltage board (AC Board) includes: CHECKING AND CHANGING PARAMETERS AND OTHER DATA Menu Parameters Digital Inputs Digital Outputs Analog Inputs Calibration Set Clock and Date Printer Test Language History RESSETTING THE AUTOCLAVE MAINTENANCE AND REPLACEMENT PROCEDURES Preliminary Operations for Each Technician Call Safety tests after repair Preventive maintenance Dismantling the Outer Covers of the Autoclave Replacing the Safety Valve Replacing chamber heater Replacing steam generator heater Replacing the cut-off thermostat Replacing and cleaning the generator s water level electrode Replacing the Drain Valve Replacing the Door Cover Replacing the Panel Replacing the Printer Door Page 1 of 87 Pages

4 9.14 Replacing the Door Handle Replacing the Plastic Handle Cover Replacing the Printer Replacing the Door Switch Replacing the fuse on the Electronic Board Replacing the fuse of the transformer Replacing the water pump Replacing the vacuum pump Replacing the Plunger or Coil of the 1/4" Solenoid Valve Replacing the Electronic Boards Replacing the switch Draining the generator Emergency Door Opening Cleaning and replacing the water reservoirs Cleaning and replacing the water reservoirs Replacing the cut-of thermostat Replacing the PT100 of the chamber's heating element Replacing the pressure transducer TROUBLESHOOTING Preliminary Check Troubleshooting procedure LIST OF SPARE PARTS PRESSURE VS TEMPERATURE FOR SATURATED STEAM Page 2 of 87 Pages

5 TABLE OF CONTENTS (Continue) PARAGRAPH PAGE NO. Front View...5 Rear View...6 Control System Block Diagram Plastic Elements on the Front Panel Nova4-A1 Board Nova4-D2N Board Exploded Drawing Electrical Diagram Piping Diagram Page 3 of 87 Pages

6 1 INTRODUCTION This manual, together with the operator s manual, forms the complete edition of the Operation and Maintenance instructions. This manual is intended for the use of the technician. It is forbidden for unqualified and unauthorized personnel to service the autoclave in accordance with the instructions in this manual. Any unauthorized service may result in the invalidation of the manufacturer s guarantee. The qualified technician shall be an authorized electrician with the right qualifications in electronics and shall be familiar with the local technical/electrical regulations. 2 SYMBOL DESCRIPTION Caution! Consult accompanying documents Caution! Hot surface Caution! Hot steam. Protective earth (Ground) Page 4 of 87 Pages

7 FRONT VIEW No. Description No. Description 1 Water reservoir funnel 10 Operating key board 2 Autoclave cover 11 Printer cover 3 Water level side gauge 12 Printer (option) 4 Mineral-free water reservoir cover 13 Legs 5 Chamber and steam generator safety valves 6 Waste water reservoir cover 15 7 Display 16 Door cover 8 Ventilation grill 17 Door switch 14 Waste water reservoir drain valve Mineral-free water reservoir drain valve 9 Main switch circuit breaker 18 Door closing device Page 5 of 87 Pages

8 REAR VIEW No. Description 1 Mineral-free water reservoir cover 2 Waste water reservoir cover 3 Ventilation grills 4 Air filter service cover 5 Opening for calibration 6 Main power electric cable socket Page 6 of 87 Pages

9 3 INSTALLATION 3.1 Placing CAUTION: The installation and all operations described in this chapter must be done only by an authorized technician Unpacking the autoclave Unpack the autoclave and inspect for mechanical damage upon receipt. Observe packing method and retain packing materials until the unit has been inspected. Mechanical inspection involves checking for signs of physical damage such as: scratched panel surfaces, broken knobs, etc. To avoid injuries, lifting and carrying of the autoclave should be done with at least two persons or by using a fork-lift or any other mechanical aid Installation preparations 1. Check and verify that the counter carrying the autoclave is a rigid and leveled surface and can carry a load of 80kg. 2. Check and verify that the counter dimensions are, at least, 55cmW x 65cmD (22 W x 25 D) 3. Keep the back and the sides of the autoclave approximately 5 cm (2 ) and away from the wall to allow ventilation and facilitate the device disconnection. 4. If placed in a cabinet, verify that the rear of the cabinet is open to allow ventilation. Insufficient space for ventilation may result in an increase of the autoclave's temperature that may damage the instrument. 5. It is recommended that enough space be left around the autoclave to give a technician access for servicing the machine. 6. Check and verify that the room ventilation is 10 cycles per hour Minimum. 7. Check and verify that the ambient temperature range is 5ºC-40ºC (it is preferable not to exceed 30ºC). 8. Check and verify that the ambient relative humidity does not exceed 85% Connections to Utility Supplies 1. Check and verify that the power supply is a 1 phase, 200/208/230Vac ±10%, 50/60Hz (as appropriate), 10A supply. 2. Check and verify grounding of the autoclave. 3. Check and verify that the electrical net is protected with a current leakage safety relay Final adjustments Once the autoclave is installed, the following operations have to be performed before operating any cycle: Page 7 of 87 Pages

10 1. Setting clock and date (See instruction in the user manual clause 6.2). 2. Adjust parameter ATMPressure according to the altitude of the autoclave (See instruction for adjusting parameters ATMPressure clause 7.2.6) Operating the autoclave 1 Plug the power cord into the power socket. 2 Turn on the main switch circuit breaker (see front view). 3 Fill the mineral water reservoir with water (see "Filling the Mineral-Free Water Reservoir") as follows: 3.1 Fill 4 liter by pouring water in the upper filling opening. 3.2 Fill the remaining quantity by pouring water gently, into the front funnel until it reaches the required level on the side gauge. It is preferable to use a carafe 4 Select "Vacuum Test" cycle to avoid operating the steam generator and the heating elements. 5 Open the door of the autoclave and remove the trays and the packaging material. 6 Insert a paper roll in the printer (see printer handling). 7 Close the door and perform a Vacuum Test. If the test fails perform another test since the fail may be a result of moister in the air. If the second test fails too, refer to the troubleshooting. 8 Select the B&D Test cycle. At this stage the chamber is heating up and the generator builds up pressure. Wait approximately 20 minutes (from selecting the B&D Test). 9 Explain and instruct the operator as follows (use the operation manual as reference): 9.1 Operation principals of the autoclave. 9.2 Preparation for sterilizing instruction including loading instructions. 9.3 Intended use of each cycle. 9.4 Selecting a cycle. 9.5 Water filling method. 9.6 Displayed error and operational messages. 9.7 Monitoring and changing parameters. 9.8 Printer handling. 9.9 Maintenance instructions 10 Perform a B&D test with a chemical indicator. 11 The operator shall perform a cycle under supervision of the technician. 3.2 Lifting and carrying CAUTION: Page 8 of 87 Pages

11 Before moving the autoclave, Make sure that the electric cord is disconnected from the power, and there is no pressure in the chamber and in the generator. Attention! The pressure of the generator does not decrease immediately when the equipment is turned off. Wait approx. ½ an hour to verify that the pressure decreased to atmospheric pressure. 1. Disconnect the power supply cord. 2. Drain the water from both reservoirs. To avoid injuries, lifting and carrying should be done with at least two persons or by using a fork-lift or any other mechanical aid. Do not drop the device! Page 9 of 87 Pages

12 4 TESTS 4.1 Installation Tests The service technician shall perform the following preliminary checks before operating the autoclave: a. Integrity Check Perform a visual check to verify that there are no dents, scratches, broken gauges, etc. b Leveling Check Check (visual check) that the surface carrying the autoclave is leveled. c. Leakage current test Check the precise operation of the earth leakage relay. d. Continuity Check Check the continuity of the grounding connection. At this stage operate the autoclave and continue with the tests: e. Safety Check Check the safety elements; safety valve and the door locking mechanisms. f. Programs Check Run basic programs of the autoclave and check the operation sequences, the sterilization parameters etc. g. Validation Validate the sterilization cycles, taking in consideration the interface of packaging/goods/autoclave. After the above steps are performed, the autoclave is ready for operation. 4.2 Periodical Tests PERIOD TEST 1 month Test the safety valve by operating it. Remove the autoclave s cover, tighten the heaters screws and 6 months electrical connections, valves and connectors in the control box. Check the continuity of the grounding connections. Check the temperature and pressure calibration. Perform validation of the autoclave. Check the precise operation of the earth leakage relay. Check that the autoclave is leveled. Check the safety elements; safety valve, safety and cut-off thermostats door locking mechanisms. Year Run basic programs of the autoclave and check the operation sequences, the sterilization parameters etc. Check the water reservoir, piping, plastic parts and electric wires. Check and tighten the piping joints to avoid leakage. Check and tighten all screw connections in the control box, heaters and valves and instrumentation. Calibrate the temperature and pressure once a year or in reference to local rules or regulations (refer to the section on Calibration). 5 years Observe the closing device for excessive wear Safety tests (pressure vessel, efficiency, electrical) shall be performed in accordance with local rules or regulations, by an authorized inspector. Only an authorized technician shall perform the 6-months and yearly tests! Page 10 of 87 Pages

13 5 WATER QUALITY 5.1 Water for Generating Steam The distilled or mineral free water supplied to the sterilizer shall be according to the table below: Physical Characteristics and Maximum acceptable contaminants levels in steam for sterlizers (According to EN 13060:2004). Element Condensate allowable content Silicium oxide. SiO mg/kg Iron Cadmium Lead Rest of metals except iron, cadmium, lead Chloride (Cl) Phosphate (P 2 O 5 ) Conductivity (at 20 C) 0.1 mg/kg mg/kg 0.05 mg/kg 0.1 mg/kg 0.1 mg/kg 0.1 mg/kg 3 µs/cm ph value (degree of acidity) 5 to 7 Appearance Hardness (Σ Ions of alkaline earth) Colourless clean without sediment 0.02 mmol/l Compliance with the above data should be tested in accordance with acknowledged analytical methods, by an authorized laboratory. Attention: We recommend testing the water quality once a month. The use of water that does not comply with the table above may have severe impact on the working life of the sterilizer and can invalidate the manufacturer s guarantee. Page 11 of 87 Pages

14 6 CONTROL SYSTEM DESCRIPTION The control system is based on 2 electronic boards, see the diagram below. Control system block diagram PC Main Board Keypad DPU30 Printer Digital input Press. Sensors electrodes DISPLAY AC Board Jack. temp Chamb. Temp Door Lock Water Pump Power Circuit Breaker Solenoid valves Power Transformer Heaters Vacuum Pump L N GND Power Inlet The control system contains the parts listed below: Main board AC high voltage power board Transformer (230V /24VAC) Electrical wires 6.1 The main board includes: Stabilized power supply 24VAC-5VAC Analog inputs for reading the analog sensors (temperature sensors, pressure sensor, water level electrodes) Digital inputs for reading the digital indicators (door switch, float reservoir if available) Digital outputs to control the solenoid valves and the door lock. Digital outputs to send signal to high voltage board or power element drivers to control power elements. Display A memory logging the previous cycles Drivers for printer Real time clock to serve as clock to the system Connection to the printer. It is connected directly to this board through a flat cable 24 pins. Page 12 of 87 Pages

15 6.2 The high voltage board (AC Board) includes: High power outputs to control the heaters and the pumps. Circuit breaker The board provides four outputs for four high AC devices as follows: 1. Steam generator heater (2200 Watt). 2. Chamber wall heater (500 Watt). 3. Vacuum pump. 4. Water pump. Connection between the 2 cards Page 13 of 87 Pages

16 7 CHECKING AND CHANGING PARAMETERS AND OTHER DATA For special application it may be required to change parameters. Note! The autoclave is sent from the manufacturer with validated parameters. Any change of the parameters requires a validation of the autoclave. The device is identified by its software and parameter versions. Any change of the parameters will increase the parameter version number. In order to change parameters and check various components, you can enter a few sub-directories and check or change the required data. These sub-directories include the following: No. Sub-directory Operation 1. Parameters Changing parameters 2. Digital Inputs Checking digital inputs 3. Digital Outputs Checking digital outputs 4. Analog Inputs Checking analog inputs 5. Calibration Calibration temperature and pressure 6. Set Clock Setting the clock (time and date) 7. Printer Test Testing the printer 8. History Printing the last cycles Page 14 of 87 Pages

17 7.1 Menu Entering the sub-directories and performing the operation shall be done as described ahead. 1. Main screen 134 C C 100kPaG 08:03:06 Turn on the autoclave with the main power switch located on the right side of the autoclave (see FRONT VIEW). The main screen is displayed. To enter the menu press simultaneously the UP and DOWN keys. 2. Enter Code ENTER CODE SET Menu MENU Parameters Digital Inputs Digital Outputs Analog Inputs Calibration Set Clock Printer Test History EXIT EXIT ENTER CODE will be displayed. Enter the technician code (0022) as follows: The cursor is under the right digit. To change the right digit, press the UP or DOWN pushbuttons. Each press on the UP pushbutton will increase the digit by 1 and each press on the DOWN pushbutton will decrease it by 1. Change this digit as required and press the START/STOP pushbutton to move the cursor to the second digit from the right. Repeat this until the curser is under SET (SET is blinking), and then press the UP pushbutton to enter the MENU. The MENU contains 8 sub-directories (see display on the left). Move to the required sub-directory using the UP and DOWN pushbutton. The pointed subdirectory is blinking. Pressing START/STOP pushbutton will select the blinking directory and the required directory will be displayed. To return to the previous display press the UP and DOWN keys until reaching EXIT. When EXIT is blinking, press the START/STOP key and the main screen will be displayed. Page 15 of 87 Pages

18 7.2 Parameters This section describes the parameters, how they affect the process and the way to change them. Listed bellow are all the available parameters. Each section describes the parameter, the minimum and maximum allowed values and the changing resolution. Also included are the preset values of the parameters for each cycle (default value). NOTE: If a parameter is modified, the only way to return to the original value is to manually reenter it. A global parameter is a parameter that by changing its value in one program, it is changed in all the other programs to receive the same value. To change a non-global value, i.e. specific parameter for each program, choose first the required sterilization program in the main screen of the autoclave and then enter the MENU and the sub-directory PARAMETERS Ster Temp This parameter will set the desired temperature for sterilization Resolution: 0.1 C Minimum value: Default value Maximum value: 136 C Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry 121 Delicate B&D Test Fixed value Vacuum Test Fixed value Ster Time This parameter will set the time desired for sterilization. Resolution: 0.1 min Minimum value: Default value Maximum value: 99.9 min Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry 121 Delicate B&D Test Fixed value Vacuum Test Fixed value Page 16 of 87 Pages

19 7.2.3 Dry Time This parameter will set the time desired for drying. Resolution: 0.1 min Minimum value: Default value Maximum value: 99.9 min Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry 121 Delicate B&D Test Vacuum Test Fixed Fixed value value SterPressAdd This defines the required addition to the sterilization pressure in kpa in order to increase the sterilization temperature. For example, for a sterilization temperature of 121 C the required pressure is 205 kpa. Since the system controls the sterilization process according to pressure, if SterPressAdd equals 0, the system will maintain the pressure at 205 kpa. If the value is at 5 kpa, the system will be maintained at 210 kpa and the temperature will be C, and so on. Resolution: 0.1 kpa Minimum value: 0 kpa Maximum value: 40 kpa Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry 121 Delicate B&D Test Fixed value Vacuum Test Fixed value End Temp This parameter will determine the temperature in the chamber at the end of the cycle. Resolution: 0.1 C Minimum value: 50 C Maximum value:136 C Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry 121 Delicate B&D Test Fixed value Vacuum Test Fixed value Page 17 of 87 Pages

20 7.2.6 ATMPressure This parameter tells the unit the atmospheric pressure of the location in which the autoclave is installed. The pressure entered must be with an accuracy of 5% of the actual atmospheric pressure for that location. It is a global parameter that means that you only need to enter this parameter once in anyone cycle and all cycles will be updated. This value can easily be calculated by knowing the altitude of your location. The atmospheric pressure at Sea Level is 100 kpa For every 100 meter above sea level, the atmospheric pressure drops 1 kpa. For every 100 meter below sea level, the atmospheric pressure increases 1 kpa. Changes in pressure do to weather will not affect the accuracy of this unit. Resolution: 0.1 kpa Minimum value: 70 kpa Maximum value: 110 kpa Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry kpa (global parameter) Delicate B&D Test Vacuum Test Ster PrintT This parameter will set the interval between printings during the sterilization stage. Resolution: 1 sec Minimum value: 10 sec Maximum value: 360 sec Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry sec (global parameter) Delicate B&D Test Vacuum Test Print Rate This parameter will set the interval between printings during the other stages. Resolution: 1 sec Minimum value: 10 sec Maximum value: 360 sec Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry sec (global parameter) Delicate B&D Test Vacuum Test Page 18 of 87 Pages

21 7.2.9 TempInF This parameter enables the technician to set the displayed temperature in ºC or in ºF. Changing this parameter in one of the cycles will change this parameter in all the other cycles to the value. Access Code available upon request Resolution 1 Value 0 or 1 If TemInf = 1 the temperature is expressed in ºF. If TemInf = 0 the temperature is expressed in ºC. Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry (global parameter) Delicate B&D Test Vacuum Test PressInPSI This parameter enables the technician to set the displayed pressure in kpa or in psig. Changing this parameter in one of the cycles will change this parameter in all the other cycles to the value. Access Code available upon request Resolution 1 Value 0, 1 or 2 If PresInPSI = 0 the temperature is expressed in kpa. If PresInPSI = 1 the temperature is expressed in psia. If PresInPSI = 2 the temperature is expressed in psig. Cycle Default Value Flash 134 P134 Wdry 134 No Dry 121 Wdry (global parameter) Delicate B&D Test Vacuum Test Page 19 of 87 Pages

22 7.3 Digital Inputs This directory enables monitoring the status of the digital inputs. It is possible to view the digital inputs during cycle. 1. To move from one item to another item use the UP and DOWN pushbuttons. 2. To exit to the menu go to EXIT and when it is blinking press the START/STOP pushbuttons. Displayed Displayed item symbol Thermostat (not applicable on this model) Float RESERV (not applicable on this model) Door Switch Float Res (not applicable on this model) Operation Thermostat disconnects the heaters. Senses water in the clean water reservoir. Senses if the door is open or closed. Senses water in the waste water reservoir. Status The temperature is above the acceptable temperature. The temperature is below the acceptable temperature. The float doesn t sense water in the clean water reservoir. The float senses water in the clean water reservoir. The sensor senses the door is closed. The sensor senses the door is open. The float doesn t sense water in the waste water reservoir. The float senses water in the waste water reservoir. Page 20 of 87 Pages

23 7.4 Digital Outputs This directory enables monitoring the status of the digital Outputs. It is possible to view the digital outputs during cycle. 1. To move from one item to another item use the UP and DOWN pushbuttons. 2. To exit to the menu go to EXIT and when it is blinking press the START/STOP pushbuttons. Displayed item Air Vac valve Displayed Operation symbol Not operating Operating Not operating Operating Not operating Chamb Steam Operating Not operating Fast exh Operating Option 1 Not operating Operating Not operating Wtr to Res Operating Air Not operating VacPump Operating Water Not operating Valve Operating Not operating Option 2 Operating Locked position Door lock Unlocked position Not operating Heater 1 Operating Not operating Heater 2 Operating Vacuum Not operating pump Operating Water Not operating pump Operating Off Buzzer Buzzing On Backlight Off Remarks Air valve (valve 43) Vacuum valve (valve 52) Steam inlet valve to the chamber (valve 93) Fast exhaust valve to the reservoir (valve 71) Optional Mineral free water to reservoir (valve 21) Air inlet valve to the vacuum pump (valve 44) Optional Optional Door locking pin Steam generator heating element Chamber heating element Vacuum pump Water pump Buzzer Screen Page 21 of 87 Pages

24 7.5 Analog Inputs This directory enables to check the analog Inputs. It is possible to enter this directory while the autoclave is performing a cycle in order to check the devices sending these inputs. 1. To move from one item to another item use the UP and DOWN pushbuttons. 2. To exit to the menu go to EXIT and when it is blinking press the START/STOP key. Displayed item Chambpress Chambtemp Coil Temp Gen Press Electr Gen ElectrLow ElectrLow2 Description Pressure inside the chamber Temperature in the chamber Temperature in jacket of the chamber Pressure in the steam generator Level of water in the steam generator This analog input measures the level of water in the clean water reservoir. This analog input measures the level of water in the waste water reservoir. Page 22 of 87 Pages

25 7.6 Calibration Calibration components This directory describes the calibration of 4 sensors in the Sensor name Sensor function 1. ChambPress Reads the pressure in the chamber. 2. ChambTemp Reads the temperature in the chamber. 3. CoilTemp Reads the temperature in the jacket. 4. GenPress Reads the pressure in the steam generator Required equipment for calibration PT Simulator (for temperature calibration). Reference temperature sensor. Reference pressure tool: pressure gauge Calibrating the sensors ANALOG INPUTS ChambPress Chamb Temp CoilTemp GenPress CALIBRATION Change GainOffset Calc. GainOffset Restore Last Restore Default EXIT Choose the sensor required to calibrate among the 4 sensors available with the UP and DOWN keys. When it is blinking select it by pressing the START/STOP key. Move to Calc. GainOffset with the UP and DOWN keys, and then when it is blinking select it with the START/STOP key. Calibrating the pressure in the chamber ChambPress Calibrate the low pressure of the chamber To perform the low pressure calibration, insert your reference pressure tool in the autoclave and operate a vacuum test. Open the autoclave s door and read the value displayed on your tool. AL (actual pressure low value): change the AL with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RL (read pressure low value): change the RL with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Page 23 of 87 Pages

26 Calibrate the high pressure of the chamber To perform the calibration of the high pressure, insert your reference pressure tool in the autoclave and operate a program of 134 C. Perform the calibration when the autoclave reaches the sterilization stage. AH (actual pressure high value): change the AH with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RH (read pressure high value): change the RH with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Calibrating the temperature in the chamber ChambTemp Calibrate the low temperature of the chamber To perform the calibration of the low temperature, insert your reference temperature tool in the autoclave, near of the Pt100 of the chamber when the autoclave is cold. AL (actual temperature low value): change the AL with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RL (read temperature low value): change the RL with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Calibrate the high temperature of the chamber To perform the calibration of the high temperature, insert your reference pressure tool in the autoclave, near of the PT100 and operate a program of 134 C. Perform the calibration when the autoclave reaches the sterilization stage. AH (actual temperature high value): change the AH with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). Page 24 of 87 Pages

27 RH (read temperature high value): change the RH with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Calibrating the temperature in the jacket CoilTemp Calibrate the low temperature of the jacket To perform the calibration of the low temperature, insert the reference temperature tool into the autoclave, near the PT100 of the jacket (under the insulation blanket) when the autoclave is cold. AL (actual temperature low value): change the AL with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RL (read temperature low value): change the RL with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Calibrate the high temperature of the chamber wall To perform the calibration of the high temperature, insert your reference pressure tool in the autoclave, near of the PT100 of the chamber wall (under the insulation blanket), and operate a program of 134 C. Perform the calibration when the autoclave reaches the sterilization stage. AH (actual temperature high value): change the AH with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RH (read temperature high value): change the RH with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Page 25 of 87 Pages

28 Calibrating the pressure in the steam generator GenPress Calibrate the low pressure of the steam generator To perform the calibration of the low pressure, insert your reference pressure tool in the steam generator when the autoclave is cold. AL (actual pressure low value): change the AL with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RL (read pressure low value): change the RL with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Calibrate the high pressure of the steam generator To perform the calibration of the high pressure, insert your reference pressure tool in the steam generator when the autoclave is ready to operate. AH (actual pressure high value): change the AH with the value read by your reference tool (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). RH (read pressure high value): change the RH with this same value (use UP and DOWN keys to increase and decrease the value and the START/STOP key to move ahead from digit to digit). To save the data move to SET by pressing the START/STOP key and when it is blinking press the UP key. Pressure gauge Page 26 of 87 Pages

29 7.7 Set Clock and Date This directory allows setting the time and the date. When entering the SET CLOCK directory, the time and the date are displayed. The cursor is on the hour that is blinking. Time: the time is displayed in the upper row in the form hh: mm: ss. The hour range is 24 hour. Date: the date is displayed in the lower row in the form DD: MM: YYYY. To increase or decrease the value of the digit use the UP and DOWN keys. To move the cursor from one digit to another press the START/STOP keys. After completing setting the time and the date go to SAVE by pressing the START/STOP key and when it is blinking select it by pressing UP key. To leave the directory move to EXIT by pressing the START/STOP key and when it is blinking select it by pressing UP key. Page 27 of 87 Pages

30 7.8 Printer Test This option checks the good functioning of the printer. 1. Select "Printer Test" as described in section 7.1 "Menu". 2. Press the START/STOP key to perform the Printer Test. 3. Check that the message Printer Test is written on the paper. After the printer test is completed, the display returns automatically to MENU. Page 28 of 87 Pages

31 7.9 Language THIS OPTION IS NOT AVAILABLE YET Page 29 of 87 Pages

32 7.10 History This directory enables the operator to print printouts of the last 40 cycles. When entering the directory, the list of the last cycles is displayed. Use UP and DOWN keys to browse through the last 40 cycles (according to the load number of the cycle). When the required cycle is blinking select it with the START/STOP key and it will be printed. To leave the directory move to EXIT using the UP and DOWN keys and when it is blinking select it by pressing the START/STOP key. Page 30 of 87 Pages

33 8 RESSETTING THE AUTOCLAVE Whenever it becomes necessary to restore the system to normal operation, the system must be reset. This will remove corrupted data from memory and restore a healthy program. On occasion other situations require that a reset be performed, they are as follows: When the machine is operated for the first time. If the machine has been sitting unused for a long period of time. To reset the system proceed as follows: Turn-off the main power switch on the right side of the autoclave. Turn-on the main switch while pressing and holding the DOWN key until the message RESET DONE!!! is displayed. Page 31 of 87 Pages

34 9 MAINTENANCE AND REPLACEMENT PROCEDURES 9.1 Preliminary Operations for Each Technician Call 1. In order to maintain efficient service, the technician must perform the following: 1. Cleaning the following, if requires cleaning: Chamber, trays and trays holder. Filters. Bottom parts and plungers of the solenoid valves. Water level electrodes in the generator. Water reservoir. Steam generator (including descaling). 2. Visual inspection for leaks or corrosion in the piping elements 3. Fastening loose screws and piping joints. 4. Visual inspection of the wiring. 5. Calibration and logging the calibration of the temperature and pressure. 2. After completing the work, the technician must perform the following cycles: 1. Vacuum test 2. B & d test 3. A 134ºC (273ºF) cycle with full load. Page 32 of 87 Pages

35 9.2 Safety tests after repair ATTENTION! After every repair or dismantling the enclosure, the autoclave should pass two safety electrical test by the Service Engineer. The following shall be performed: 1. Enclosure Leakage Current Test. Every autoclave should pass this test as follows: 1. Connect the electrical cord to the autoclave. 2. Turn on the main switch on the right side of the autoclave. 3. Short-circuit the L and N pins on the cord's plug. 4. Connect the Short-circuit pins to the L pole on the Megger. 5. Connect the earth pins to the earth pole on the Megger. 6. Impose an electrical potential of V on the tested autoclave. The insulation resistance should be at least 2 MΩ. The test is successful if there was no leakage. 2. Protective Earth Impedance Test 1. Connect the grounding pin of the power cord plug to one pole of an Ohmmeter. 2. Connect any other metallic part (preferable the metallic part of the locking screw) to the second pole of the Ohmmeter. 3. The resistance should not exceed 0.3 Ω. After performing these tests, the Service Engineer should complete and sign the Work Order. Page 33 of 87 Pages

36 9.3 Preventive maintenance The following preventive maintenance operations shall be carried out by the technician once a year or every 1000 cycles (the shorter period). 1. Check the interior of the autoclave. If the autoclave is dirty it requires cleaning as follows: Take out the tray holder and trays. Clean the tray holder, trays and chamber's interior (especially its bottom part) with a cleaning agent & water. Wipe off the sediments from the chamber bottom with a sponge. You may use diluted Chamber Brite solution as cleaning agent. To prepare this solution, pour one bag of Chamber Brite into 3/4 1 liter of warm mineral-free water. Immediately after cleaning, rinse the tray holder, trays and chamber's interior with water to avoid stains on the metal. 2. Clean and descale the chamber and the reservoir using a cleaning agent as described above. CAUTION: Do not use steel wool or steel brush as this can damage the chamber! 3. Clean the outer parts of the autoclave with a soft cloth. 4. Replace mineral free water in the reservoir. If the autoclave was not used, drain the water from the mineral free water reservoir once a week, and refill with fresh mineral-free water or distilled. 5. Drain the water from the waste water reservoir. 6. Disassemble all the solenoid valve and clean the plunger and the plunger's seat. Check for wear and replace worn parts. 7. Disassemble the generator, remove the heating element, clean the heating element and the interior of the generator and replace the water level electrode. Page 34 of 87 Pages

37 9.4 Dismantling the Outer Covers of the Autoclave Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Allow the autoclave to cool before removing outer covers. 1. Unscrew the screws (2) holding the upper cover (1). 2. Remove the upper cover. 3. Unscrew the screws (4) holding the side covers (3). 4. Remove the side covers (3). 5. Disconnect the air filter (6) from the air filter cover (7). 6. Unscrew the screws (5) holding the rear covers (8). 7. Remove the rear cover (8). 8. Remove the grounding wires from the rear cover Page 35 of 87 Pages

38 9.5 Replacing the Safety Valve Caution! Before starting, be sure that the electric cord is disconnected and that there is no pressure in the chamber, coil or generator. Allow the autoclave to cool before removing outer covers. The safety valve is installed to protect the system from over pressurizing should all the electrical controls fail. 1. Take off the autoclave cover (see para. 9.3 Removing the Autoclave s Outer Covers ). 2. Remove the water reservoir gasket. 3. Unscrew the safety valve (2) and remove it from the safety valve base (1). 4. Replace the valve with a new safety valve (install only an original equipment replacement!). Use Teflon on the thread to seal it. Tighten the safety valve to prevent leaking. 5. To check the new safety valve, perform the following: 6. Turn the pressure relief nut (3) two turns counter clockwise. 7. Turn on the autoclave and perform one cycle and verify that the valve operates correctly. 8. Turn off the autoclave, wait until the generator cools down and the pressure decreases to atmospheric pressure. 9. Turn the pressure relief nut two turns clockwise to re-adjust the relief pressure. No. Description 1 Safety valve base 2 Safety valve 3 Pressure relief nut Page 36 of 87 Pages

39 9.6 Replacing chamber heater Caution: Before starting, be sure that the electric cord is disconnected from the power source and that there is no pressure in the autoclave chamber. Allow the autoclave and the steam generator to cool before removing outer covers. 7. Take off the autoclave covers (see para. 9.3 Removing the autoclave s covers ). 8. Remove the insulation blanket. 9. Remove the heating element tightening bolts. 10. Disconnect the heating element wires from the porcelain connector. 11. Replace the heating element 12. Insert the PT100 and the cut-off sensors. 13. Re-assemble the autoclave insulation and cover. 14. Tighten the fastening bolts. 15. Run a cycle and verify that it operates as required. Page 37 of 87 Pages

40 9.7 Replacing steam generator heater Caution: Before starting, be sure that the electric cord is disconnected from the power source and that there is no pressure in the autoclave chamber. Allow the autoclave and the steam generator to cool before removing outer covers. 1. Remove the autoclave cover (see para. 9.3 Removing the autoclave s outer covers ). 2. Drain the water from the generator by opening the drain plug. Wait until all the water has drained from the generator. 3. Disconnect the heating element wires from the porcelain connector. 4. Remove the heating element from the generator. 5. Replace the thermostat. 6. Reassemble the heating element. 7. Reassemble the autoclave s cover. 8. Test the autoclave by performing a full cycle. Page 38 of 87 Pages

41 9.8 Replacing the cut-off thermostat The autoclave is equipped with a temperature thermostat, which protects the heaters and the autoclave against overheating, during the dry cycle. This device reconnects automatically when the chamber cools down. Caution Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Allow the autoclave to cool before removing outer covers. The two temperature safety thermostats are located on the socket panel on the rear of the autoclave. 1. Remove the rear cover (see para. 9.3 Removing the autoclave s outer covers ). 2. Loosen the heating band (see para. 9.5 Replacing chamber heater ). 3. Unscrew the thermostat and replace it with a new one. 4. Perform any dry cycle to verify that the temperature safety thermostat disconnects the heating units. 1 2 No. Description 1 Chamber heater cut-off thermostat 2 Steam generator heater cut-off thermostat Page 39 of 87 Pages

42 9.9 Replacing and cleaning the generator s water level electrode The electrode that controls the water level of the generator is located in the rear of the generator. The Electrode performs the following: a. It protects the heating element by switching it off when there is not enough water in the generator. b. It maintains the water level in the generator by switching the water pump on and off as required. To clean or replace the electrode proceed as follows (refer to the picture and the drawings on the next page): Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber or the generator. Allow the autoclave to cool before removing outer covers. 1. Take off the autoclave cover (see para. 9.3 Removing the Autoclave s Outer Covers ). 2. Remove the electrical connection from the terminal of the electrode. 3. Unscrew the locking nut and remove the electrode from the top of the housing. 4. Replace the electrode with a new one or reinstall the same electrode after cleaning. 4.1 To clean the electrode, use a damp cloth or sponge. A mild soapy solution may be used, rinse thoroughly. DO NOT use any harsh chemicals 4.2 When installing a new electrode, make sure that the electrode is positioned exactly as described in drawing "water level electrode (see drawing ahead). 5. Tighten the locking nut to prevent any steam or water leakage. 6. Reconnect the electrical wire to the electrode terminal. 7. Turn the autoclave on. The generator will automatically fill with water. Observe that the unit is heating. Wait for the unit to reach 308 kpa, and then check for leaks around the locking nuts. 8. Reassemble the cover. Page 40 of 87 Pages

43 Page 41 of 87 Pages Water Sensing Electrodes

44 9.10 Replacing the Drain Valve There are two drain valves on the front of the autoclave. One drains the mineral free water from the clean reservoir and the other drains the water from the waste water reservoir. Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Allow the autoclave to cool before removing outer covers. 1. Drain the reservoir. 2. Remove the autoclave cover (see para. 9.3 Removing the Autoclave s Outer Covers ). 3. Disconnect the drain tube from the valve (1). 4. Unscrew nut (6) using a 21mm socket wrench. 5. Remove the drain valve (1) from the panel (7). 6. Install a new valve and reassemble the drain tube to the drain valve. 7. Verify that there is no leakage VLV VLV VLV Page 42 of 87 Pages

45 PLASTIC ELEMENTS ON THE FRONT PANEL The autoclave cover is composed with these components. For replacing them, see the following sections. Page 43 of 87 Pages

46 9.11 Replacing the Door Cover Caution! Before starting, open the door first, then disconnect the instrument from the power source and ensure that there is no pressure in the chamber, coil or generator. Allow the autoclave to cool before removing outer covers. 1. Unscrew the 6 screws (1) attaching the Door Cover to the lower (3) and upper (2) cover-holders. 2. Remove the Door Cover. 3. Position the new Door Cover and screw in the 6 screws (1). 4. Turn the main power back on. 5. Close the door, select a cycle and run the autoclave. Check that there is no steam or pressure leak around the door. If there is a leak tighten the door slightly No. description 1 Fastening screws 2 Upper cover-holder 3 Lower cover-holder Page 44 of 87 Pages

47 9.12 Replacing the Panel Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Allow the autoclave to cool before replacing the Panel. 1. Open the printer's door (4). 2. Unscrew the three bottom fastening screws (5). 3. Unscrew the top fastening screw (1). 4. Pull the panel approx. 30 centimeters. 5. Remove the digital card (located on the rear side of the panel). 6. Remove the printer (3) (see sec "Replacing the Printer"). 7. Assemble the digital card on the new panel. 8. Assemble the printer on the new panel. 9. Assemble the panel and fasten it to the autoclave with the 4 fastening screws (1 & 5) Page 45 of 87 Pages

48 9.13 Replacing the Printer Door Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Allow the autoclave to cool before replacing the Printer Door. 1. Open the printer's door (3). 2. Unscrew and remove the 3 screws (2) holding the Printer Door to the Integral Hinge (1). 3. Remove the Printer Door. 4. Assemble the new Printer Door to the Integral Hinge with the 3 screws (2) Page 46 of 87 Pages

49 9.14 Replacing the Door Handle Caution! Before starting, ensure that there is no pressure in the autoclave. Allow the autoclave to cool before replacing the Door Handle. Do not disconnect the electric power, since disconnecting the power will lock the handle and prevent replacement of the handle. 1. Open the autoclave's door. 2. Unscrew the 3 screws (3) fastening the door cover to the door's upper holder (5). 3. Unscrew the 3 screws (7) fastening the door cover to the door's lower holder (8). 4. Unscrew the bolt (4) tightening the door and remove the screw with the spring. 5. Remove the door (6). 6. Pull back the door's handle (as in opening the door) and unscrew the 2 screws (9) fastening the handle cover. 7. Remove the handle cover (1). 8. Remove the handle (6) from its slots (9) by pulling it in the arrow direction. 9. Insert a new handle. 10. Reassemble the handle cover and fasten it with the screws. 11. Reassemble the door with the screw and spring. 12. Reassemble the door cover with its 6 screws Page 47 of 87 Pages

50 9.15 Replacing the Plastic Handle Cover Caution! Before starting, ensure that there is no pressure in the autoclave. Allow the autoclave to cool before replacing the Door Handle. Do not disconnect the electric power, since disconnecting the power will lock the handle and prevent replacement of the handle. 1. Open the autoclave's door. 2. Unscrew the 3 screws (3) fastening the door cover to the door's upper holder (5). 3. Unscrew the 3 screws (7) fastening the door cover to the door's lower holder (8). 4. Unscrew the bolt (4) tightening the door and remove the screw with the spring. 5. Remove the door (6). 6. Pull back the door's handle (as in opening the door) and unscrew the 2 screws (9) fastening the handle cover. 7. Remove the handle cover (8). 8. Assemble the new handle cover and fasten it with the screws. 9. Reassemble the door with the screw and spring. 10. Reassemble the door cover with its 6 screws Page 48 of 87 Pages 9 10

51 9.16 Replacing the Printer Caution! Before starting, disconnect the instrument from the power source and unsure that there is no pressure in the chamber or the generator. Allow the autoclave to cool before removing outer covers. 1. Remove the autoclave cover (see sec. 9.3 Dismantling the Outer Covers of the Autoclave ). 2. Disconnect the connector of the cable (1) connecting the electronic box to the printer (2). 3. Unscrew the two screws (3) attaching the fastening bracket (4) to the printer. 4. Remove the printer. 5. Set the dip switches on the new printer, located on the back side of the printer, as follows: 1, 2, 3, 4, up 5, 6, 7, 8 down 6. Insert the new printer into its frame. 7. Assemble the fastening bracket to the printer with the two screws (2) and verify that it is placed firmly. 8. Connect the (1) cable to the printer. 9. Verify connection of power by performing a self-test. 10. Run a cycle and verify that the printer operates correctly. 9 up 10 down No. Cat. No. Description 1 CTP Cable, Printer, DPU-30, 30cm, 34p 2 THE Printer, DPU-30, Seiko 3 BOL Screw, printer tightening 4 Supplied with the printer Fastening bracket Page 49 of 87 Pages

52 9.17 Replacing the Door Switch Caution! Before starting, disconnect the instrument from the power source and verify that there is no pressure in the chamber or the generator. Allow the autoclave to cool before removing outer covers. 1. Remove the autoclave top and left covers (see para. 9.3 Dismantling the Outer Covers of the Autoclave ). 2. Open the door 3. Unscrew the 2 screws (1) holding the door switch adapter (4) on the front panel of the autoclave. 4. Disconnect the 2 wires (3) from the door switch (2). 5. Remove the door switch from the autoclave. 6. Unscrew the door switch (2) from the door switch adapter (4). 7. Assemble the new door switch to the adapter. 8. Reconnect the 2 wires (3) to the door switch. Verify that the green wire is connected to screw no. 1 (marked on the switch) and the red wire is connected to screw no. 3 (marked on the switch). 9. Reassemble the door switch with its adapter to the front panel. Make sure that the door switch is installed correctly! Check that the operational message Door is Open" is displayed when the door is opened and that the message disappears when the door is closed Page 50 of 87 Pages

53 9.18 Replacing the fuse on the Electronic Board Caution! Before starting, disconnect the instrument from the power source. There are 3 fuses on the AC card: 1. fuse 3.15 A FAST to the chamber heater 2. fuse 2A FAST to the vacuum pump 3. fuse 2A FAST to the water pump To replace the fuses operate as following: 6. Disconnect the keyboard panel from the autoclave (see sec " Replacing the Panel"). 7. Pull it outwards as far as possible. 8. With a small screwdriver disconnect the fuse holder (2) from the board (1). 9. Remove the faulty fuse (6) from the holder and replace it with a new one. 10. Return the fuse holder with the new fuse to the board. 11. Reassemble the panel Page 51 of 87 Pages

54 9.19 Replacing the fuse of the transformer Caution! Before starting, disconnect the instrument from the power source. Allow the autoclave to cool before removing outer covers. 1. Remove the rear cover (see sec. 9.3 Dismantling the Outer Covers of the Autoclave ). 2. If necessary, cut one plastic cable holder to release the fuse capsule (4). 2. Unscrew the two halves of the fuse capsule apart (1) and (3). 3. Take out the burnt fuse and replace it with a new 5A fuse (3) 4. Reassemble the fuse holder. 5. Replace the cut cable holder. 5. Re-assemble the covers Page 52 of 87 Pages

55 9.20 Replacing the water pump 1. Empty the water reservoir. 2. Remove the autoclave rear cover (see sec. 9.3 Dismantling the Outer Covers of the Autoclave ). 3. Disassemble the electrical socket bracket. 4. Disconnect the wires from the pump. 5. Disconnect the piping from the pump. 6. Remove the pump from the rubber shock absorbers. If the rubber shock absorbers are damaged, replace them. 7. Replace the damaged pump with a new pump. 8. Reconnect wiring and piping Reassemble the electrical socket bracket. 10. Reassemble the rear cover. 11. Turn on the autoclave and verify it operates correctly. 6 No. Description Cat. No. 1 Rubber shock absorber SKR Fitting 5/16 x1/8 (straight) 3 Screw BOL Nut NUT washer NUT Spring washer NUT ULKA water pump PUM Page 53 of 87 Pages

56 9.21 Replacing the vacuum pump Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber, coil or steam generator. Allow the autoclave to cool before removing outer covers. 1. Take off the autoclave cover (see para. 9.3 Dismantling the Outer Covers of the Autoclave ). 2. Disconnect the electrical wires (blue and brown wires) (3). 3. Disconnect the inlet tube (1) and outlet tube (4). 4. Unscrew the 4 pump-legs screws (2). 5. Remove the vacuum pump. 6. Install a new pump and assemble the leg screws (2). 7. Install tubes (1) & (4). Use Teflon tape to prevent leakage. 8. Connect the electrical wires. Verify that the wires are connected in the right way. 9. Reassemble the covers. 10. Connect the autoclave to the power supply and turn on the autoclave. Perform a leakage test and verify that the vacuum pump operates O.K Page 54 of 87 Pages

57 9.22 Replacing the Plunger or Coil of the 1/4" Solenoid Valve The solenoid valves may be out of order due to faulty plunger or coil. To repair the solenoid valve replace the faulty plunger or solenoid Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber. Allow the autoclave to cool before removing outer covers. 1. Take off the autoclave top cover (see para. 9.3 Removing the Autoclave s Outer Covers ). 2. Remove nut (1). 3. Remove the coil (2). 4. Unscrew the plunger + spring (3) with the plunger housing (4) and replace it with a new one. The plunger and the spring are replaced as a kit. 5. Reassemble the coil (2) and the nut (1). 6. Re-install the autoclave s cover Page 55 of 87 Pages

58 9.23 Replacing the Electronic Boards Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber. Allow the autoclave to cool before removing outer covers. See drawings of "Nova4-D2N" and "Nova4-A1 to assist in locating connectors marked by JP 1. Take off the autoclave top cover (see para. 9.3 Removing the Autoclave s Outer Covers ). 2. Disconnect the control panel (see para "Replacing the Panel"). 3. Disconnect all the wires from the control boards (2 & 5). Verify that the wires arte numbered according to the connector's numbers. 4. Disconnect the flat cable (7) from flat cable socket on the big board (2). 5. Remove the panel from the autoclave and place it on a table with the keyboard downwards Replacing the "Nova4-A1" (small) board 1. Disconnect wires from JP2, JP3, JP4, JP5 (6). 2. Disconnect connector JP10 (4). 3. Unscrew the 4 screws (3) attaching the small board (5) to the big board (2). 4. Remove the small board. 5. Check the isolation sheet that is placed under the board. Replace if damaged. 6. Place the new board and fasten it with the 4 screws (3). 7. Connect the wires to JP10, JP2-JP5. 8. Return the control unit to the autoclave and reconnect the wires. Be aware to the wires numbering, they fit the JP numbers on the board. 9. Re-assemble the control panel to the autoclave Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber. Allow the autoclave to cool before removing outer covers. Page 56 of 87 Pages

59 Page 57 of 87 Pages

60 Nova4-A1 Board JP10 JP2 JP3 JP4 JP5 JP11 JP9 JP7 JP8 JP6 Page 58 of 87 Pages

61 Nova4-D2N Board JP8 JP4 JP6 JP9 JP11 JP2 JP3 JP5 JP1 JP12 JP13 JP15 Page 59 of 87 Pages

62 Replacing the "Nova4-D2N" (big) board 1. Disconnect wires from JP2, JP3, JP4, JP5 (6). 2. Disconnect connector JP14 (8). 3. Unscrew the 4 screws (3) attaching the small board (5) to the big board (2). 4. Remove the small board. 5. Check the isolation sheet that is placed under the board. Replace if damaged. 6. Unscrew the 4 long spacers (9) connecting the small board to the big board. 7. Unscrew the 2 screws (12) connecting the big board to the plastic panel (11). Beware not to loose the grounding terminal (10) fastened by one of the screws. 8. Lift slightly the board and disconnect the push-buttons' flat cable (14) from its connector (13) on the rear side of the board. 9. Replace the big board with a new board. 10. Reassemble the small board and continue according to para Page 60 of 87 Pages

63 9.24 Replacing the switch Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber. Allow the autoclave to cool before removing outer covers. 1. Remove the control electronic boards (see para "Replacing the Electronic Boards"). 2. Disconnect the wires (1) from the switch (3). Log which wire is connected to each leg (2) of the switch. 3. Press the switch's fasteners (5) and push the switch inwards to release it from its seat on the panel (4). 4. Remove the switch and replace it with a new one. Pay attention to the switch's position. The "0" on the switch must be opposite the "0" in the plastic panel and the " " on the switch must be opposite the " " on the panel. 5. Connect the wires to the switch. Verify that the number on the wires match those on the switch. 6. Place the big board on the panel ad reconnect the pushbutton's flat cable to the board. 7. Reassemble the electronic boards according to para Page 61 of 87 Pages

64 9.25 Draining the generator Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the generator. Allow the autoclave to cool before draining the generator. 1. Move the autoclave aside and reveal the generator's drain plug (1). It is placed on the left bottom side of the autoclave. 2. Place a vessel under the autoclave to collect the drain water. 3. Unscrew the drain plug, using a 3/17 allen spanner. 4. After draining the water, reassemble the drain plug. 5. Move the autoclave back to its leveled position, reconnect it to the power source and turn the autoclave on. 6. Check and verify that the generator is filled with water and that the plug does not leak. 1 Page 62 of 87 Pages

65 9.26 Emergency Door Opening Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave Decreasing the pressure Since the autoclave is not equipped with an analogue pressure gauge, and the display is off (no electrical power), it is recommended to wait approximately one hour to verify that the pressure and temperature have decreased to ambient conditions. If it is required to open the door urgently, decrease the pressure by opening both, the chamber's and generator's safety valves as follows. The safety valves are located in the mineral-free water reservoir. 1 A. ASME-approved type safety valve 1. Remove water reservoir cover (1). 2. Pull the ring (4) of the safety valve using a tool, i.e. screwdriver, hook etc. (3). Pull the safety valve ring until steam ceases to escape from the safety valve. Be careful not to burn your hands No. Description 1 water reservoir cover 2 Safety valve 3 Pulling device 4 Pressure relief ring Page 63 of 87 Pages

66 B. PED-approved type safety valve 1. Remove the water reservoir cover. 2. Turn the pressure relief nut clockwise until steam ceases to escape from the safety valve. Attention: Use protective gloves in order not to burn your hands with the hot steam. 5 6 No. Description 1 Water reservoir cover 5 Safety valve 6 Pressure relief nut Opening the door 1. Insert a 2 mm (0.08") pin (1) into the hole (2) located above the door opening handle (3). 2. Press the pin downwards and, simultaneously open the door by pulling the door handle (3) in the arrow (4) direction Page 64 of 87 Pages

67 9.27 Cleaning and replacing the water reservoirs Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Note: The following instructions refer to both, the mineral-free water reservoir and to the waste-water reservoir. B 1 A Page 65 of 87 Pages

68 1. Drain the water reservoir. 2. Remove the right, rear and top covers of the autoclave (see para. 9.4 "Dismantling the Outer Covers of the Autoclave"). 3. Unscrew screws (3) and remove the right top frame (6). 4. Unscrew screws (1) and loosen the rear top frame (2). 5. Disconnect the cable terminals (4) from the water level electrodes. 6. Cut the tie wraps fastening the flexible tubs (5) to the water reservoir. 7. Disconnect the tubes from the water reservoir. 8. To replace or clean the mineral-free water reservoir, Pull the rear top frame slightly backward (A). 9. Pull the reservoir upward (B), out of the autoclave. 10. Clean or replace the reservoir as required. 11. Insert the new or clean reservoir into the autoclave. 12. Assemble the water tubes (do not forget to fasten the required tubes with tie wraps (5). 13. Connect the cable terminals (4) to the water level electrodes. 14. Re-assemble the right and rear frames. 15. Re-assemble the right rear and top covers. Page 66 of 87 Pages

69 9.28 Cleaning and replacing the water reservoirs Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave. Note: The following instructions refer to both, the mineral-free water reservoir and to the waste-water reservoir. 1. Drain the water reservoir. 2. Remove the right and rear covers of the autoclave (see para. 9.4 "Dismantling the Outer Covers of the Autoclave"). 3. Clean the water level electrodes (1) (inside the reservoir) with a soft cloth. 4. Verify that the electrodes terminals (2) are connected firmly to the electrodes. 5. Re-assemble the right and top covers. 1 2 Page 67 of 87 Pages

70 9.29 Replacing the cut-of thermostat Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber. Allow the autoclave to cool before removing outer covers. 1. Remove the autoclave's top, left and rear covers (see para. 9.3 Removing the Autoclave s Outer Covers ). 2. Open the isolation cover (7) and reveal the heating element (6). 3. Loosen the tightening bolts (5) of the heating element. 4. Pull out the cut-off sensor (bulb) (8). 5. Unscrew the screws (4) fastening the electrical bracket (3) to the frame. 6. Disconnect the electrical wires from the cut-off unit (2). 7. Unscrew the nut (1) fastening the cut-off unit to the bracket. 8. Remove the cut-off thermostat from the autoclave. 9. Insert the sensor (8) of the new cut-off thermostat into its groove. 10. Fasten the screws of the heating element. 11. Close the isolation cover. 12. Assemble the cut-off unit to the bracket and fasten the nut (1). 13. Connect the electrical wires to the cut-off. 14. Assemble the electrical bracket to the frame. 15. Close the autoclave's covers. 16. Connect the autoclave to the utilities and perform a cycle to verify that the autoclave operates as required Page 68 of 87 Pages

71 9.30 Replacing the PT100 of the chamber's heating element Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the chamber. Allow the autoclave to cool before removing outer covers. 1. Remove the autoclave's top and right covers (see para. 9.3 Removing the Autoclave s Outer Covers ). 2. Open the isolation cover (5) and reveal the heating element (2). 3. Loosen the tightening bolts (1) of the heating element. 4. Pull out the PT100 sensor (3). 5. Disconnect the PT100 wire (4) from the board. 6. Remove the temperature sensor from the autoclave. 7. Insert the sensor of the PT100 into its groove. 8. Fasten the screws of the heating element. 9. Close the isolation cover. 10. Connect the PT100 wire to the board. 11. Close the autoclave's covers Page 69 of 87 Pages

72 9.31 Replacing the pressure transducer Caution! Before starting, disconnect the instrument from the power source and ensure that there is no pressure in the autoclave and in the generator. Note: The following instructions refer to both, the chamber and the generator pressure transducer. 1. Remove the top cover (see para. 9.3 Removing the Autoclave s Outer Covers ). Picture 1 Picture 2 Picture Lift slightly the pressure transducer (1) as in picture Unscrew screw (2). 4. Remove the connector (3) as in picture Unscrew the pressure transducer. Use two open spanners (5) as shown in picture Remove the pressure transducer and replace it with a new one. 7. Fasten the new pressure transducer. Use two spanners as in picture Assemble the connector (3) and fasten it with the screw (2).push down the pressure transducer to its place, below the front panel top (4). Page 70 of 87 Pages