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[. . . ] 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. [. . . ]
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