User manual W&H LISA MB17

[. . . ] Service Manual Water Steam Sterilizer 500/300 Series LISA 500/300 SERIES 301 08 AEN REV. 4 INDEX 1 2 3 4 5 6 7 8 9 10 11 12 INTRODUCTION PRODUCT DESCRIPTION MAINTENANCE SPARE PARTS PRODUCT HISTORY TROUBLESHOOTING TESTING PRIOR TO REPAIR REPAIR FINAL CONTROL SERVICE TOOL LIST ACCESSORIES SHIPPING LISA 500/300 Service Manual - Rev. 4 THE COMPANY - W&H l STERILIZATION Premises in Brusaporto (BG) ­ Italy 99 Sterilizer assembly line Production LISA MB17/22 Series since spring of 1999 LISA 500/300 Series since March of 2006 MANUFACTURER W&H Sterilization S. r. l Italy, I-24060 Brusaporto (BG) Via Bolgara, 2 +39/035/66 63 000 +39/035/50 96 988 office@wnhster. it www. wh. com LISA 500/300 Service Manual - Rev. 4 iii SAFETY ADVICE This service manual provides information for repairing and servicing Lisa 500/300 Series sterilizers. Autoclave items are identified, and troubleshooting, replacement and adjustment are described in detail. Service should be performed only by qualified technicians. [. . . ] Even though there are a variety of alarm codes signaling vacuum related problems, troubleshooting procedures on how to address those issues are similar. Please follow the steps as outlined below in the vacuum alarm troubleshooting flow-chart and the tests on the following pages to solve any vacuum related alarms. Vacuum alarm troubleshooting flow-chart GENERAL CHECKS VACUUM TEST if A310 A320 A321 A330 if set point P1 (-0. 87bar) or is not reached within: 317 T<3min. 30sec. 522 T<2min. 30sec. P3-P2<5mbar END P3-P2>5mbar or A380 A390 TEST B checks for leaks on: o 1-way valve (ULKA valve) VACUUM CIRCUIT o o checks for: vacuum pump performance air / steam leakage TEST A STEAM CIRCUIT TEST D checks for leaks on: o steam generator o chamber interface o valves EVA/B/C external TEST C checks for leaks on: o water separation system o checks for leaks on: valves EVA/B/C internal TEST E 6-28 LISA 500/300 Service Manual - Rev. 4 Alarm Description Cause Action A190 A310 A320 A321 A330 A380 A390 Vacuum alarm troubleshooting VACUUM and STEAM CIRCUITS TEST AREAS A-E STEAM CIRCUIT VACUUM CIRCUIT C B D A D D E LISA 500/300 Service Manual - Rev. 4 6-29 Alarm Description Cause Action A190 A310 A320 A321 A330 A380 A390 Vacuum alarm troubleshooting GENERAL CHECKS 1. Pressure calibration Access the INFO menu (hidden icon) while the sterilizer is idling (open chamber door) and check the pressure readout at atmospheric conditions: At sea level, the pressure readout should be at 0. 00bar with a tolerance of +0. 02/-0. 04bar, thus the pressure should range from +0. 02 to -0. 04bar. Attention: deduct -0. 01bar for every 100m elevation gain!example 1: the ideal pressure at 500 meter elevation is -0. 05bar with a tolerance of +0. 02/-0. 04bar, thus the pressure should range from -0. 03 to -0. 09bar. example 2: the ideal pressure at 1000 meter elevation is -0. 10bar with a tolerance of +0. 02/0. 04bar, thus the pressure should range from -0. 08 to -0. 14bar. If pressure calibration is off, check or replace the pressure transducer - see alarm A140: "Pressure transducer failure" 2. Door gasket, chamber outlet filter, chamber face side o o o Replace the door gasket (moisten new gasket with water for easier placement) Clean the chamber face side Clean the chamber outlet filter 1 2 3 4 5 3. Condenser and condenser fan Remove the right side sterilizer cover and check if the condenser fan is spinning freely (blocked by a tube?). You can also power the condenser fan through the components test sub-menu. Clean the condenser if necessary. 6-30 LISA 500/300 Service Manual - Rev. 4 Alarm Description Cause Action A190 A310 A320 A321 A330 A380 A390 4. Initiate a vacuum test (ensure that the sterilizer chamber is cold and dry) Depending on the test result, perform tests A-E to find the root cause of the alarm. Test procedures are shown on the following pages. pressure Vacuum alarm troubleshooting VACUUM TEST VACUUM TEST PRESSURE PROFILE 5 minutes 10 minutes time P0 0 P3 VACUUM CIRCUIT Tank / water separation system P1 (-0, 87bar) P2 STEAM CIRCUIT B ULKA valve C Vacuum pump Steam generator if A380 A390 A A310 A320 A321 A330 If set point P1 (-0. 87bar) is not reached within: 317 T<3min. 30sec. 522 T<2min. 30sec. D if P3-P2 >5mbar Chamber interface E EVA/B/C LISA 500/300 Service Manual - Rev. 4 6-31 Alarm Description Cause Action A190 A310 A320 A321 A330 A380 A390 This test checks if the root cause of the vacuum alarm is related to the vacuum pump performance or a leakage in the pneumatic system. Vacuum alarm troubleshooting TEST A vacuum pump Initiate a vacuum test and disconnect the pump approximately 1. 5 minutes into the cycle (prior to P1). Once the pump is disconnected, access the info-menu and observe the pressure readout: if the pressure remains stable, check the vacuum pump: pump performance problem!if the pressure slowly rises, proceed with tests B ­ E: leakage! INITIATE A VACUUM TEST THE PRESSURE IS STABLE AFTER 1. 5 MINUTES DISCONNECT THE PUMP AND CHECK THE PRESSURE READOUT (INFO MENU) CHECK THE VACUUM PUMP ORINGS AND MEMBRANES; REPLACE THEM IF NECESSARY if THE PRESSURE RISES PROCEED WITH TESTS B - E 6-32 LISA 500/300 Service Manual - Rev. 4 Alarm Description Cause Action A190 A310 A320 A321 A330 A380 A390 This test checks if there is a leakage at the one-way valve placed between the water pump and the steam generator, also called ULKA valve. Vacuum alarm troubleshooting TEST B ULKA valve CRIMP THE TUBE THAT RUNS FROM THE ULKA VALVE TO THE STEAM GENERATOR INITIATE A VACUUM TEST IF THE VACUUM TEST IS OK, THERE IS PROBABLY A LEAK AT THE ULKA VALVE REPLACE THE VALVE ULKA valve LISA 500/300 Service Manual - Rev. [. . . ] Transport and store tools in protective containers (e. g. small tool suitcases) LISA 500/300 Service Manual - Rev. 4 10-1 SERVICE TOOL LIST - Available from any hardware store The tools in this list below can be purchased from the market and cannot be ordered from W&H Sterilization. Ref. # Description Figure 1 Straight circlip pliers 2 Torque wrench (torque range 2 - 24 Nm) 3 Short ratchet 1/4" 4 M5 male hexagon adapter (for chamber heater) 5 Female ½" to male ¼" adapter 6 ¼" male to female extension bar (l = 150mm) 7 3/8" universal joint 8 M8 female hexagon ¼" adapter 10-2 LISA 500/300 Service Manual - Rev. [. . . ]