FONA Hygenius Service Manual

FONA HYGENIUS 17/22
Service Manual
01/2015
EN
SERVICE MANUAL
HYGENIUS SERIES
Code Rev Date
00 14.12
1. FUNCTIONING .......................................................................................................3
1.1. STANDBY..........................................................................................................3
1.2. WARM-UP .........................................................................................................4
1.3. 1st VACUUM PHASE ........................................................................................6
1.4. 1st PRESSURE RISE........................................................................................8
1.5. 2nd VACUUM PHASE .....................................................................................10
1.6. 2nd PRESSURE RISE ....................................................................................12
1.7. 3rd VACUUM PHASE ......................................................................................14
1.8. 3rd PRESSURE RISE / STERILISATION PROCESS ....................................16
1.9. DISCHARGE ...................................................................................................19
1.10. DRYING ......................................................................................................21
1.11. VENTILATION .............................................................................................23
1.12. PRESSURE LEVELLING ............................................................................24
2. ALARMS ...............................................................................................................25
2.1. LCD INDICATIONS - CODE “E” .....................................................................25
2.2. LCD INDICATIONS “FAULT” - CODE “A” ......................................................37
2.3. LCD INDICATIONS “HAZARD” - CODE “H”...................................................56
2.4. LCD INDICATIONS “ACCESSORY”- CODE “S”.............................................63
3. SYSTEM RESET ..................................................................................................67
4. SERVICE MENU ..................................................................................................68
TECHNICAL DATASHEET ...................................................................................93
4.1. TECHNICAL DATASHEET ST01 - STEAM GENERATOR ............................93
4.2. TECHNICAL DATASHEET ST02 - MANIFOLD ..............................................99
4.3. TECHNICAL DATASHEET ST03 - DOOR GEARMOTOR ASSEMBLY .......102
4.4. TECHNICAL DATASHEET ST04 - PRESSURE TRANSDUCER - SAFETY
PRESSURE SWITCH ....................................................................................105
4.5. TECHNICAL DATASHEET ST05 - PT1 SENSOR - CHAMBER
TEMPERATURE SENSOR ...........................................................................108
4.6. FIRMWARE UPDATE ...................................................................................111
SERVICE MANUAL
1. FUNCTIONING
1.1. STANDBY
Upon power-on, the autoclave goes into STANDBY mode. User-selectable standby
options are as follows:
- STANDBY OFF
- STANDBY ON
In the STAND-BY OFF mode, the following components are not powered:
- Chamber band heater;
- Generator heating element.
In the STAND-BY ON mode the chamber heater is powered on in order to keep:

- chamber temperature at 50°C with the door open
- chamber temperature at 100°C with the door closed
On STAND BY ON mode and door closed solenoid valve EV5 is activated.
STAND BY - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Off Off Off Off

OFF Off (0) OFF OFF OFF OFF OFF
open closed closed closed
ON Off Off Off Off
door Off (0) OFF OFF OFF ON OFF
open open closed closed closed
ON Off Off Off On
door Off (0) OFF OFF OFF ON OFF
closed open closed closed open
FUNCTIONING 3
1.2. WARM-UP
When the door is closed, if one of the 6 available sterilization cycles is selected and
activated, the door is locked and the WARM-UP phase starts.
During this phase are warmed up:
- Chamber heating element;
- Steam generator heating element;
until reaching the following temperature levels.
- Chamber heating element > PT3 temperature reading - 110°C;
- Generator heating element > PT2 temperature reading - 140°C;
- Chamber internal > PT1 temperature reading - 60°C.
Reaching the above values, the next phase begins. This is the 1st VACUUM PHASE.
The 1st VACUUM PHASE start after 10 minutes even though the temperature
readings are below the values listed above.
The WARM-UP phase includes 2 sections:
- section 1 continues until PT2 temperature reading = 110°C
- section 2 continues until PT2 temperature reading = 140°C
During WARM-UP phase- section 2, the following components are turned on:
- vacuum pump
- solenoid valve EV2 (air suction)
- solenoid valve EV4 (vacuum pump bypass)
to allow the pump reaching its regular operating conditions and removing any
condensate from the piping.
WARM-UP - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4 HTNG ELMT
CHAMBER
EV2 Air inlet

VACUUM
WATER
STATE
Drain Drain Drain

PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Section On Off Off On

Off (0) OFF OFF OFF ON ON
1 closed closed closed open
Section Off On Off Off

On (1) ON OFF ON ON OFF
2 open open closed closed
FUNCTIONING 4
Pressure (bar) PROGRAM
PROCES 134°C B CYCLE
2.10
200 S
100
000
-O.BO
VACUUM DRYING
FUNCTIONING 5
1.3. 1st VACUUM PHASE
This phase marks the beginning of the proper sterilization cycle. As the vacuum
pump is activated, the maximum vacuum level in the chamber, namely – 0.80 bar,
can be reached.
The chamber heating element and the generator heating element remain activated
throughout this phase so the steam generation can be managed properly.
The 1st VACUUM PHASE must ensure that as much air as possible is removed from
the chamber. In order to achieve this, repeated steam shots are injected as pressure
drops to aid removal of any remaining air.
These steam shots are operated automatically according to pressure value in the
chamber as follows:
- steam shot starts > chamber pressure reading – 0.70
- steam shot ends > chamber pressure reading – 0.60
This sequence is repeated 3 times, and pressure drops until reaching the preset
vacuum level of – 0.80 bar. This value triggers the next phase, namely the 1st
PRESSURE RISE.
The control system operates the solenoid valve EV2 (air inlet) when it is needed to
improve vacuum pump performance, which may be the case during the last pressure
drop phase.
1st VACUUM PHASE - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet VACUUM
WATER
STATE
Drain Drain Drain

PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Drop On Off On Off

to On (1) ON OFF ON ON ON
vacuum closed closed open closed
Steam Off Off Off Off

On (1) ON ON ON ON ON
shot open closed closed closed
FUNCTIONING
6
A preset minimum pressure value can be reached during the vacuum pulses; this
value is the same for both vacuum pump types installed on the autoclaves.
VACUUM PUMP PMIN [bar]
Type H5P3 -0.80
Type EVO10 -0.80
FUNCTIONING 7
1.4. 1st PRESSURE RISE
During this phase, steam injection into the chamber is activated to raise pressure
back up to 1.00 bar from the negative value reached during the vacuum pulse.
Pressure is raised in two steps; firstly, from – 0.80 bar to 0.00 bar, and then from
0.00 bar to 1.00 bar.
During the first pressure rise step, solenoid valve EV2 is activated to compensate for
any air pockets which may have developed in the hydraulic circuit outside the
chamber.
The chamber heating element and the generator heating element remain activated
throughout the pressure rise phase to ensure that the proper temperature is
maintained in the chamber and enable fast steam generation.
1st PRESSURE RISE - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Step 1
from Off On Off Off
On (1) ON ON OFF ON ON
- 0.80 open open closed closed
to 0.00
Step 2
from Off Off Off Off
Off (2) ON ON OFF ON ON
0.00 to open closed closed closed
1.00
After the 1st PRESSURE RISE is completed properly, the sterilization cycle
continues as pressure is lowered again to the same negative value as during the 1st
VACUUM PHASE during two additional VACUUM PHASES, which are separated by
a second PRESSURE RISE up to 1.00 bar.
FUNCTIONING 8
PROCESS 134°C B CYCLE
2.10
2.00
134°C - 4'00"
1.00
Time (min)
000
·0.80
VACUUM DRYING
FUNCTIONING 9
1.5. 2nd VACUUM PHASE
During this phase of the cycle, the pressure in the chamber, which had reached 1.00
bar during the 1st PRESSURE RISE is lowered by releasing steam through solenoid
valve EV1 and the condensate fraction through solenoid valve EV3, which is
connected to the chamber filter.
Upon reaching 0.10 bar, solenoid valve EV4 is activated and has the vacuum pump
– which had been activated at the beginning of the 2nd VACUUM PHASE – lower
pressure further to approach – 0.80 bar.
No steam shots occur during this phase.
2nd VACUUM PHASE - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Direct
steam Off Off Off Off
Off (2) ON OFF ON ON ON
dis- open closed closed closed
charge
Direct
con- On Off On Off
densate Off (2) ON ON OFF ON ON
dis- closed closed open closed
charge
Pressure
drops
from On Off On Off
0.10 to closed closed open closed
-0.80
bar
FUNCTIONING 10
2.10
2.00
1.00
0.00
-0.80
VACUUM DRYING
FUNCTIONING 11
1.6. 2nd PRESSURE RISE
This phase is similar to the 1st PRESSURE RISE, in that pressure rises back up to
1.00 bar from the negative value reached during the vacuum pulse.
The sequence of vacuum pulses and pressure rise phases eliminates nearly all air
left inside the sterilization chamber, as well as any air contained in any hollow bodies
or porous materials included in the load.
Eliminating air ensures optimal steam diffusion and equal temperature at all points of
the load.
2nd PRESSURE RISE - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Step 1
from Off On Off Off
- 0.80 open open closed closed
to 0.00
Step 2
1.00
FUNCTIONING 12
After this phase, the 3rd VACUUM PHASE is carried out in the same mode used for
the 2nd VACUUM PHASE.
FUNCTIONING
13
1.7. 3rd VACUUM PHASE
This phase, which takes place right before the PROCESS phase, includes both
direct steam and condensate discharge and a forced pressure drop to – 0.80 bar
achieved by the vacuum pump.
3rd VACUUM PHASE - components on state
EV5
GENERATOR
BUNDLE HTR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Direct Off Off Off Off

steam Off (2) ON OFF ON ON ON
discharge open closed closed closed
Direct
conden- On Off On Off
sate closed closed open closed
discharge
Pressure
drops
from On Off On Off
0.10 to closed closed open closed
- 0.80
bar
FUNCTIONING 14
2.10
2.00
1.00
0.00
-0.80
VACUUM DRYING
FUNCTIONING 15
1.8. 3rd PRESSURE RISE / STERILISATION PROCESS
Alternating pressure drops to a vacuum value of – 0.80 bar with two pressure rise
phases up to 1.00 bar ensures that a residual amount of air of 0.06% of total initial
air is retained.
After the phases outlined above, a 3rd PRESSURE RISE begins that introduces the
STERILIZATION PROCESS proper, which occurs at 134°C/2.15 bar or 121°C/1.10
bar, depending on which type of cycle has been selected.
During this pressure rise phase, the different components are in the same (on/off)
states as during the previous phases.
3rd PRESSURE RISE - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Step 1
from Off On Off Off
- 0.80 to open open closed closed
0.00
Step 2
1.00
FUNCTIONING 16
Reaching the pressure and temperature values set for the selected sterilization
cycle, a BALANCING phase of nearly 15” is activated to stabilize temperature
inside the chamber before the proper PROCESS phase begins.
Maximum, normal and minimum pressure values to be observed during the
BALANCING and PROCESS phases are set for each cycle.
Cycle type Pmax Pmed Pmin
121°C 1.14 1.11 1.08
134°C 2.17 2.14 2.12
During the BALANCING and PROCESS phases, the control system takes the
following actions as required:
- it powers on the chamber heating element to raise value T in the chamber
- it powers on EV1 to discharge steam from the chamber when pressure rises
above the allowed Pmax value
- it powers on the water injection pump/EV6 to inject steam into the chamber when
pressure drops below the allowed Pmin value
FUNCTIONING 17
2.10
2.00
134°C - 4'00"
100
Time (min)
0.00
-0.80
VACUUM DRYING
FUNCTIONING 18
1.9. DISCHARGE
When the PROCESS phase is completed start the DISCHARGE phase. During
this phase, all steam is discharged from the chamber up to reaching a vacuum
value of - 0.80 bar.
Just like the previous PRESSURE DROPS TO VACUUM phases, the DISCHARGE
phase begins with a natural depressurization phase that uses the pressure
generated by steam, during which only activate the drain solenoid valves EV1 and
EV3.
To achieve complete DISCHARGE, until achieving – 0.80 bar, the system keeps
lowering pressure by means of the vacuum pump and operating the solenoid valve
EV4.
Again, the solenoid valve EV2 is activated to balance pressure inside the hydraulic
circuit and aid the operation of the vacuum pump.
DISCHARGE - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Direct Off Off Off Off

steam Off (2) ON OFF ON ON ON
discharge open closed closed closed
Direct On Off On Off
condensate Off (2) ON OFF ON ON ON
discharge closed closed open closed
Pressure
drops On Off On Off
from 0.10 On (1) ON OFF ON ON ON
to -0.80 closed closed open closed
bar
FUNCTIONING 19
After the DISCHARGE phase, the DRYING phase begins. This phase is an integral
part of the sterilization cycle.
FUNCTIONING 20
1.10. DRYING
This phase of the sterilization cycle eliminates any moisture left inside the chamber
and fully dries the load.
Drying is achieved by maintaining a negative pressure level inside the chamber, so
that condensate can evaporate even at temperatures below 100°C.
The drying phase has a different duration for each sterilization cycle (e.g. 12’ for
134°C universal cycle). During the drying phase, a series of pressure pulses take
place in the chamber, approximately between - 0.80 bar and - 0.40 bar, to aid total
removal of any residual steam; the number of pulses may vary depending on the
moisture content in the load.
During the pressure rise phases that take place during these pulses, solenoid valve
EV5 is activated to let air flow into the chamber through the bacteriological filter; this
air flow aids steam removal.
DRYING - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
STATE
WATER
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Pressure On Off On Off
On (1) ON OFF ON ON ON
drop closed closed open closed
Pressure On Off On On
rise closed closed open open
FUNCTIONING 21
When the standard drying time – plus any additional drying time set by user –have
elapsed, the VENTILATION phase begins.
FUNCTIONING 22
1.11. VENTILATION
During this phase, pressure starts rising again gradually to achieve a balance with
ambient pressure.
Pressure is raised by keeping suction in the chamber active through the vacuum
pump, while air is admitted to the chamber through the bacteriological filter/EV5;
VENTILATION ends upon reaching a pressure of > -0.30 bar in the chamber.
VENTILATION - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Pressure On Off On On
rise closed closed open open
Next, the PRESSURE LEVELLING phase and finally the CYCLE END phase begin.
FUNCTIONING 23
1.12. PRESSURE LEVELLING
The PRESSURE LEVELLING phase restores ambient pressure, which a condition
necessary to achieve cycle end and enable door opening.
Chamber pressure is brought to ambient pressure levels by letting air flow into the
chamber through the bacteriological filter/EV5, without suction.
LEVELLING - components on state
EV5
BUNDLE HTR
GENERATOR
EV1 EV3 EV4
HTNG ELMT
CHAMBER
EV2 Air inlet
VACUUM
WATER
STATE
Drain Drain Drain
PUMP
PUMP
FAN
Air inlet to
High Low bypass
(NC) chamber
(NO) (NC) (3V)
(NC)
Pressure Off Off Off On

Off (2) ON OFF OFF ON ON
rise open closed closed open
After chamber pressure has reached – 0.02 bar, the CYCLE END begins and a
corresponding indication appears on the display.
It only at this time that the door release control is enabled and user may open the
door, bringing the autoclave back into STANDBY mode.
FUNCTIONING
24
2.1 LCD E INDICATIONS
LCD E 000 Indication Alarm description Effect / Symptom

BLACKOUT Blackout. 24Vdc < 15V in cycle.
Possible causes / Checks Solution
Power supply voltage failed When power supply is back, observe the indications
suddenly. that appear on the LCD to open the door. Reset the
alarm to repeat the sterilization cycle.
The autoclave was switched Power on the autoclave and observe the indications
off accidentally from the that appear on the LCD to open the door. Reset the
main switch. alarm to repeat the sterilization cycle.
The autoclave switched off Reconnect the power cord and observe the
when the power plug was indications that appear on the LCD to open the door.
pulled from the socket. Reset the alarm to repeat the sterilization cycle.
The alarm appears at each Ensure that the operator has reset the alarm
power-on. properly and provide advice as to proper operation
There is a problem with the Test the 16-a mains fuses for continuity using a
fuse holders. tester Replace blown fuse with an equally rated
fuse. Power on the autoclave and observe the
indications that appear on the LCD to open the door.
Check the fuse holder plug. Check to ensure that plug is not over tight.
Loosen plug a bit to achieve proper tightening.
Problem with power cord – If damage is found, replace the complete power
check power cord. cord.
OVERVOLTAGE Overvoltage. 24Vdc < 34V in cycle.
Power supply voltage
Disconnect the power cord and check mains
outside limits – check power
voltage. Value must be within nominal voltage limits
supply voltage. +/- 10%.
If outside limits, do not connect the autoclave and
check the power mains.
Transformer output voltage Disconnect transformer output cable and check
too high – check output voltage. Value should not exceed 34V.
voltage. Change transformer.
ALARMS 25
WATER QUALITY Threshold 1 exceeded Conductivity reading
INSUFFICIENT - water conductivity between 20 and 60 μS.
between 20 and 60 μS.
Demineralized water used is Drain feed tank and fill with demineralized water
poor quality – check label conforming to 15 μS specification.
information.
For connection to Drain feed tank, replace the 2 resin cartridges for
demineralizer PURE 100 - PURE 100.
check device. Refill the tank.
For connection to Drain feed tank, replace filter elements kit for PURE
demineralizer PURE 500 – 500.
check device. Refill the tank.
For connection to central Drain feed tank, select manual filling, and fill tank
demineralizer system – with demineralized water conforming to 15 μS
check quality of water specification.
supplied by the system. Once the proper conductivity of the water supplied
by the central system has been restored and
confirmed, select automatic filling and refill tank.
ALARMS 26
WATER QUALITY Threshold 2 exceeded Conductivity reading above
INSUFFICIENT - water conductivity 60 μS.
above 60 μS.
Quality of water used is Drain feed tank and fill with demineralized water
inadequate. conforming to 15 μS specification.
Cycles-to-shutdown counter Activate sterilization cycle to reset autoclave cycles-
is active – a maximum of 5 to-shutdown counter.
cycles can be performed.
For connection to Drain feed tank, replace the 2 resin cartridges for
demineralizer PURE 100 – PURE 100.
check device. Refill the tank, activate sterilization cycle to reset
autoclave cycles-to-shutdown counter.
For connection to Drain feed tank, replace filter elements kit for PURE
demineralizer PURE 500 - 500.
check device. Refill the tank, activate sterilization cycle to reset
autoclave cycles-to-shutdown counter.
For connection to central Drain feed tank, select manual filling, and fill tank
demineralizer system – with demineralized water conforming to 15 μS
check quality of water specification.
supplied by the system. Once the proper conductivity of the water supplied
by the central system has been restored and
confirmed, select automatic filling, refill tank and
activate sterilization cycle to reset autoclave cycles-
to-shutdown counter.

DOOR OPEN Door open. Cycle was activated with
the door open.
Instruct operator on proper procedures to close and
Door is not closed properly.
open door.
Door closed position not Check microswitch for proper operation from menu
sensed – check door ajar SERVICE/COMPONENT TESTS/DOOR – SQ20.
microswitch. Change microswitch - see technical datasheet ST03
- DOOR GEARMOTOR ASSEMBLY.
ALARMS 27
LCD E 020 Indication Alarm description Effect / Symp tom
DOOR LOCK TIMEOUT Door lock (CLOSING) When program started, the
operation TIMEOUT closing mechanism did not
time elapsed.lock the door within 3” (both
switches open - I
motor < 3A).
Door closed microswitch Check microswitch for proper operation from menu
faulty – check microswitch. SERVICE/COMPONENT TESTS/DOOR – SQ20.
Change microswitch - see technical datasheet ST03
Safety pressure switch of Check to ensure pressure switch contact closes
closing system faulty – properly, testing for continuity across connection
check pressure switch. points of white wires.
Change pressure switch – see technical datasheet
ST04 - PRESSURE TRANSDUCER - SAFETY
PRESSURE SWITCH.
Door closing servomotor Check servomotor for proper operation from menu .
faulty – check servomotor SERVICE/COMPONENT TESTS/DOOR – SQ20.
for proper operation.
Change gearmotor - see technical datasheet ST03 -
DOOR GEARMOTOR ASSEMBLY.
Problem with servomotor Check lubrication of both components.
worm screw/cross member Check condition of threads of both components.
threaded bushing screwing Check door gasket for proper position.
– check for proper screwing. Change motor endless screw- see technical
datasheet ST03 - DOOR GEARMOTOR
ASSEMBLY.
Change cross member threaded.
28
ALARMS
DOOR LOCK TIMEOUT Door servomotor The door opening system
operation TIMEOUT does not release the 2
time elapsed door microswitches within
(OPENING). 3” at cycle end
TIMEOUT time elapsed
(both switches are in
closed position).
Door microswitches faulty – Check microswitches for proper operation from
check microswitches. menu SERVICE/COMPONENT TESTS/DOOR –
SQ.
Change microswitch.
Door closing servomotor Check servomotor for proper operation from menu .
faulty – check servomotor SERVICE/COMPONENT TESTS/DOOR – SQ20.
for proper operation.
Change gearmotor - see technical datasheet ST03 -
DOOR GEARMOTOR ASSEMBLY.
Problem with door swing Check for proper swing motion when door is
motion during opening - opening, it is operated by door-ajar microswitch pin.
check hinge. Check cross member hinge and lubricate as
required.
ALARMS 29
DOOR LOCK TIMEOUT Door lock Microswitch state not
microswitches failure. consistent with door locked
condition during cycle.
Problem with microswitch Check to ensure wiring of door approaching
wiring – check wiring. microswitch and door closing microswitch is
connected properly
Check microswitches for proper operation from
menu SERVICE/COMPONENT TESTS/DOOR –
SQ20.
Problem with door Check microswitches for proper operation from
microswitches – check menu SERVICE/COMPONENT TESTS/DOOR –
microswitches. SQ20.
MIN WATER LEVEL The water in the feed A program was started
tank is at minimum with minimum water level.
level (MIN).
Minimum water level in feed Top up with water until maximum level icon appears.
tank was sensed when
cycle was activated – check
level.
Minimum level sensor Check position of level sensor. .
misreading – check sensor. Check wiring of minimum level sensor.
Check sensor for proper operation from menu
SERVICE/WATER FILLING TIMES – S Q34.
Change minimum level sensor.
ALARMS 30
MAX DRAIN LEVEL Maximum water level Maximum level in used
in drain tank (MAX). water tank when cycle was
activated.
Maximum water level in Drain tank completely.
drain tank was sensed when
cycle was activated – check
level.
Maximum level sensor Check position of drain maximum level sensor. .
misreading – check sensor. Check wiring of drain maximum level sensor.
Check sensor for proper operation from menu
SERVICE/WATER FILLING TIMES – SQ34.
Change level sensor.
TOP-UP PROBLEM Tank filling occurs too Automatic filling activated
frequently only with twice during 2 consecutive
automatic filling.
For connection to external Check pump for correct position, check condition of
filling pump – check pump. suction filter, check water level in external tank.
For connection to Check demineralizer connection to water mains. .
demineralizer PURE 100 / Check supplied “water block” system.
PURE 500 – check device. Check inspection filter on demineralizer-to-autoclave
connection.
Check to ensure that demineralizer EV opens from
menu SERVICE/WATER FILLING TIMES – SQ35.
Check position of cutoff valves in demineralizer.
For connection to central Check water supply from central system.
demineralizer system – Check to ensure that EV AUX opens from menu
check device. SERVICE/WATER FILLING TIMES – SQ35.
Check inspection filter on central system-to-EV AUX
connection.

MAX FILLING LEVEL WARNING: Maximum Maximum level was
level detected in feed reached during manual
tank. filling.
Excessive manual filling – Reset message and activate c ycle. .
check level.
31
TEST FAILED Vacuum test failed Pressure rise in chamber
during TEST PHASE – too fast (p2 - p3) / 10 >
5min. 0.13 kPa/min (1.3
mbar/min).
Problem with door gasket Clean gasket and steel ledge thoroughly, reset
sealing – check gasket. alarm and repeat one test cycle.
Clean gasket seating surface in cap.
Check for residue on inside face of gasket lip.
Check cap adjustment and re-adjust as required.
Check door cap.

Problem with reinforced For all reinforced tubes connected to chamber, .
tube sealing – check tubes steam generator, manifold unit, check:
and connections. - Condition of reinforced tubes at connection
point, checking for correct tube position on
fitting.
- Stainless steel clamp is in place and
tightened properly.
To check for proper sealing, you may start a test
cycle from menu SERVICE/TEST CYCLES/NO
VACUUM SQ22, that will pressurize the system
omitting the pre-vacuum phases.
Problem with Teflon tube For Teflon tubes connected to pressure transducer
sealing - check tubes and and safety pressure switch, check:
connections. - Proper fastening of tubes to fittings at
chamber rear end and to the 2 components.
- Condition of Teflon tube on fitting, under
locking ring nut.
Tighten properly, if needed, after cutting off the end
of the Teflon tube that was locked under the ring
nut.
ALARMS 32
Problem with Manifold For solenoid valves EV1 – EV3 – EV5, check:
solenoid valve sealing - - cursor and seat for proper closing, condition
check for proper sealing. and cleanliness.
To check for proper sealing, it might be a good idea to
test the individual solenoid valves from menu
SERVICE/COMPONENT TEST/SOLENOID VALVES
– OTHER COMPONENTS SQ 12/SQ 13, that lets you
actuate the individual solenoid valves to confirm that
they close properly.
Problem with steam Check the condition of the reinforced tubes
generator sealing – check connected to the generator and their stainless steel
for proper sealing. clamps.
Check for proper sealing at the coupling between
outer body/inner core of generator.
ALARMS 33
TEST FAILED Vacuum test failed Excessive pressure rise in
during TEST PHASE – chamber
10min. (P2-P1) < 0.10 bar.
Problem with door gasket Clean gasket and steel ledge thoroughly, reset
sealing – check gasket. alarm and repeat one test cycle.
Clean gasket seating surface in cap.
Check for residue on inside face of gasket lip.
Check cap adjustment and re-adjust as required.
Check door cap.
Problem with reinforced For all reinforced tubes connected to chamber, .
tube sealing – check tubes steam generator, manifold unit, check:
and connections. - Condition of reinforced tubes at connection
point, checking for correct tube position on
fitting.
- Stainless steel clamp is in place and
tightened properly.
Problem with Teflon tube For Teflon tubes connected to pressure transducer
sealing - check tubes and and safety pressure switch, check:
connections. - Proper fastening of tubes to fittings at
chamber rear end and to the 2 components.
- Condition of Teflon tube on fitting, under
locking ring nut.
Tighten properly, if needed, after cutting off the end
of the Teflon tube that was locked under the ring
nut.
VACUUM SQ, that will pressurize the system
ALARMS 34
Problem with Manifold For solenoid valves EV1 – EV3 – EV5, check:
solenoid valve sealing - - cursor and seat for proper closing, condition
check for proper sealing. and cleanliness.
To check for proper sealing, it might be a good idea
to test the individual solenoid valves from menu
SERVICE/COMPONENT TEST/SOLENOID
VALVES – OTHER COMPONENTS SQ 12/SQ 13,
that lets you actuate the individual solenoid valves to
confirm that they close properly.
Problem with steam Check the condition of the reinforced tubes
generator sealing – check connected to the generator and their stainless steel
for proper sealing. clamps.
Check for proper sealing at the coupling between
outer body/inner core of generator.
ALARMS 35
TEST FAILED VACUUM PULSE Negative pressure value of
FAILED: Vacuum test – 0.80 bar not reached
failed, vacuum pulse before set TIMEOUT.
TIMEOUT exceeded.
Problem with vacuum pump Confirm pump start-up when test cycle is activated.
start-up – check pump. To perform this check, it might be a good idea to
activate the vacuum pump from menu
SERVICE/COMPONENT TEST/OTHER
COMPONENTS – SOLENOID VALVES SQ 14, that
lets you detect air suction from the chamber.
Check/Change the vacuum pump.
Problem with vacuum pump Check chamber drain filter. .
efficiency – check pump. Check vacuum pump diaphragms.
Check vacuum pump shutters.
Vacuum pump maintenance.
Problem with solenoid valve Check for proper activation and opening of EV3 –
activation – check solenoid EV4.
valves. To perform this check, it might be a good idea to
check for EV3 –EV4 opening activate from menu
COMPONENTS – SOLENOID VALVES SQ 15, that
lets you detect air suction from the chamber.
Problem with tubes – check Check condition and proper connection of:
tubes. - Reinforced tubes of chamber
- TEFLON tubes
- Braided tubes of heat exchanger
Problem with heat Disconnect inlet and outlet tubes of exchanger,
exchanger sealing - check connect tubes together so as to bypass exchanger.
heat exchanger. Activate test cycle.
Change heat exchanger.
MANUAL INTERRUPTION Manually interrupting STOP control is kept
the cycle. depressed for at least 3”
and cycle is stopped.
User pressed the The manual STOP control must only be used when .
START/STOP key. necessary.
Do not use it to add load to the chamber.
ALARMS 36
2.2 LCD A INDICATIONS
LCD A 032 Indication Alarm description Effect / Symptom

H2O LEVEL PROBLEM Inconsistent readings The MIN and MAX level
of feed tank water level signals are activated at the
sensors. same time (MIN OFF /
MAX ON).
Problem with sensor Check that wiring is properly connected to level
connections – check sensors.
connections. Check that sensor wiring is properly connected to
electronic card.
Check sensors for proper operation from menu
Problem with level reading – Check sensors for proper operation from menu
check sensors. SERVICE/WATER FILLING TIMES – SQ33.
Change damaged level sensor.
Problem with electronic card Change card.
for sensor readings – check
reading.
ALARMS 37
TOP-UP PROBLEM Tank filling failed During automatic filling,
(automatic filling). minimum level sensor is
not reached within the set
TIMEOUT time XX”.
For external filling pump Check for proper connection of pump power supply
connection – check for cord to jack at autoclave rear end.
proper operation. Check for proper connection of pump outlet tube to
automatic filling fitting at autoclave rear end.
Check pump suction filter.
Check to ensure that external filling pump is
activated from menu SERVICE/WATER FILLING
TIMES – SQ33.
For connection to Check for proper connection of solenoid valve power
demineralizer PURE 100 / supply cord to jack at autoclave rear end.
PURE 500. Check for proper connection of demineralizer outlet
tube to automatic filling fitting at autoclave rear end.
Check water supply from water mains.
Check inspection filter on demineralizer-to-autoclave
connection.
Check to ensure that demineralizer solenoid valve
opens from menu SERVICE/WATER FILLING
TIMES – SQ33.
Problem with level sensor – Check wiring of minimum level sensor.
check sensor. Check sensors for proper operation from menu
Change level sensor.
ALARMS 38
PT1 INTERRUPTED Sterilization chamber Control system detects
temperature sensor interruption in PT1 and its
PT1 interrupted. wiring.
Problem with PT1 wiring – Check condition of PT1 to electronic card wiring
check wiring. connection.
Problem with PT1 Look at cycle report to determine alarm intervention
interruption – check sensor. point.
Disconnect PT1 sensor from electronic card.
Check for continuity and measure resistance, which
should be between 1000 and 1500 ohm.
Change sensor PT1 - see technical datasheet ST05
- PT1 SENSOR - CHAMBER TEMPERATURE
SENSOR.
Problem with electronic Change electronic card.
card.
PT2 INTERRUPTED Steam generator Control system detects
temperature sensor interruption in PT2 and its
PT2 interrupted. wiring.
Change PT2 - see technical datasheet ST01 -
STEAM GENERATOR.
card.
ALARMS 39
PT3 INTERRUPTED Temperature sensor Control system detects
PT3 of chamber tube interruption in PT3 and its
bundle heating element wiring.
interrupted.
Change PT3.
card.
PT5 INTERRUPTED Temperature sensor Control system detects
PT5 for conductivity interruption in PT5 and its
sensor measurement wiring.
compensation
interrupted.
Problem with PT5 wiring – Check condition of wiring connecting conductivity
check wiring. sensor to electronic card.
Problem with PT5 Disconnect conductivity sensor from electronic card.
interruption – check sensor. Check for continuity.
Change conductivity sensor.
card.
ALARMS 40
PT1 SHORT-CIRCUITED Sterilization chamber Control system detects a
temperature sensor short circuit in PT1 and its
PT1 short-circuited. wiring.
Problem with PT1 wiring – Check condition of PT1 wiring paying special
check wiring. attention to electronic card connector.
Problem with PT1 sensor – Check PT1 resistance.
check sensor. Change sensor PT1 - see technical datasheet ST05
- PT1 SENSOR - CHAMBER TEMPERATURE
SENSOR..

PT2 SHORT-CIRCUITED Steam generator Control system detects a
temperature sensor short circuit in PT2 and its
PT2 short-circuited. wiring.
check sensor. Change sensor PT2 - see technical datasheet ST01
- STEAM GENERATOR.
PT3 SHORT-CIRCUITED Temperature sensor Control system detects a
PT3 of chamber tube short circuit in PT3 and its
bundle heating wiring.
element short-
circuited.
check sensor.
Change sensor PT3.
ALARMS
41
PT5 SHORT-CIRCUITED Temperature sensor Control system detects a
PT5 for conductivity short circuit in PT5 and its
sensor measurement wiring.
compensation short-
circuited.
Problem with PT5 wiring – Check condition of conductivity sensor wiring paying
check wiring. special attention to electronic card connector.
Problem with PT5 sensor – Measure resistance.
check sensor.
Change conductivity sensor.
ADC ERROR ADC error - ADC ADC timeout with N
timeout exceeded. conversion attempts
greater than 5.
ADC failed Change electronic card.
REFERENCE HEATING Reference heating Control system detects a
ELEMENT FAULT element acquisition problem with reference
chain fault. heating elements for
automatic sensor
calibration.
Check R143 resistance on Change electronic card.
electronic card.
REFERENCE HEATING Reference heating Autocalibration reference
ELEMENT FAULT element acquisition heating element does not
chain fault. complete sequence.
Short R143 reference Change electronic card.
heating element to check it.
ALARMS
42
Check R142 resistance on Change electronic card.
electronic card.
GENERATOR WARM-UP Standby - door open. During STANDBY, the
PROBLEM Steam generator pre- control system detects that
heating not performed generator heating element
during timeout. failed to activate to achieve
PT2=50°C.
Problem with generator Check safety thermostat by performing a manual
safety thermostat-check reset (“click”).
device.
Change safety thermostat - see technical datasheet
ST01 - STEAM GENERATOR.
Problem with generator Check for continuity and measure resistance of
heating element – check heating element.
component.
See technical datasheet ST01 - STEAM
GENERATOR..
The electronic card is Change electronic card.
damaged.
ALARMS
43
HEATING ELEMENT Standby - door open. During STANDBY, the
WARM-UP Pre-heating of chamber control system detects that
PROBLEM tube bundle heating tube bundle heating
element not performed element failed to activate
during timeout. to achieve PT3=50°C.
device.
Change safety thermostat.
damaged.
GENERATOR WARM-UP Standby - door closed. During STANDBY, the con-
PROBLEM Steam generator pre- trol system detects that
heating not performed generator heating element
during timeout. failed to activate to achieve
PT2=100°C.
device.
Change safety thermostat - see technical datasheet
ST01 - STEAM GENERATOR.
Problem with generator Check for continuity and measure resistance of
heating element – check heating element.
component.
See technical datasheet ST01 - STEAM
GENERATOR.
damaged.
HEATING ELEMENT Standby - door closed. During STANDBY, the
WARM-UP Pre-heating of chamber control system detects that
PROBLEM tube bundle heating tube bundle heating
element not performed element failed to activate
during timeout. to achieve PT3=100°C.
Problem with safety Check safety thermostat by performing a manual
thermostat of tube bundle reset (“click”).
heating element-check device.
Change safety thermostat.
damaged.
ALARMS
44
PV1 TIMEOUT 1st vacuum pulse not During the 1st vacuum
reached within timeout. pulse, the 0.80 bar value is
not reached within timeout
time
Problem with autoclave Check quantity and arrangement of load inside
loading – check load. chamber.
Observe the indications provided in the User
Manual.
Problem with chamber drain Check and clean chamber filter.
filter – check component. Observe the indications provided in the User
Manual.
Problem with vacuum pump Confirm vacuum pump start-up.
activation – check pump. To perform this check, it might be a good idea to
activate the vacuum pump from menu
SERVICE/COMPONENT TEST/OTHER COMPO-
NENTS – SOLENOID VALVES SQ 14, that lets you
detect air suction from the chamber.
Measure pump power supply voltage.
Change vacuum pump.
Problem with vacuum pump Check vacuum pump tube connections.
performance – check Check vacuum pump diaphragms.
device. Check vacuum pump shutters.
Vacuum pump maintenance.

Problem with solenoid valve Check for proper activation and opening of EV3 –
activation – check solenoid EV4.
valves. To perform this check, it might be a good idea to
check for EV3 –EV4 opening activate from menu
NENTS – SOLENOID VALVES – SQ 15, that lets
you detect air suction from the chamber.
Problem with tubes – check Check condition and proper connection of:
tubes. - Reinforced tubes of chamber
- TEFLON tubes
- Braided tubes of heat exchanger
ALARMS
45
PP1 TIMEOUT First pressure pulse First pressure rise from
did not reach 0.00 bar 0.80 to 0.00 bar not
within timeout. completed within timeout
time.
Observe the indications provided in the User
Manual.
Problem with water injection Check feed tank filter and water injection pump inlet
pump of steam generator – filter.
check device. Check for proper activation of water pump and
check that EV6 opens.
Problem with steam
To perform this check, it might be a good idea to
generator clogging – check
activate vacuum pump and EV6 from menu
device.
NENTS – SQ 17, that lets you detect water flowing
through the generator and into the chamber.
Identify leaks on tubes connecting water pump and
generator.
Change vibration pump.
Steam generator maintenance – see datasheet
ST01.
Problem with generator Check and reset safety thermostat if needed.
warm-up – check device. Check steam generator heating element.
See ST01 – steam generator datasheet. -
Problem with manifold Check EV1 for proper power supply and sealing .
solenoid valve sealing – Check EV3 for proper sealing.
check components.
MANIFOLD - see datasheet ST02.
ALARMS
46
PP1 TIMEOUT First pressure pulse First press ure pulse from
time.
Problem with water injection
Check feed tank filter and water injection pump inlet
Problem with steam
device.
generator.
ST01.
check components.
DISCHARGE TIMEOUT First pressure drop First pressure discharge
from 1.00 to 0.10 bar from 1.00 to 0.10 bar not
not completed within completed within timeout
timeout. time.
Manual.
Problem with discharge Check that EV1 opens properly, not powered on.
solenoid valves EV1 – EV3 Check that EV3 receives proper power supply and
– check components. opens properly.
Check solenoid valve seat and cursor of EV1 and
EV3.
ALARMS
47
PV2 TIMEOUT Second vacuum pulse Second pre-vacuum not
from 0.00 to – 0.80 bar completed within timeout
not achieved within time.
timeout.
activation – check To perform this check, it might be a good idea to
component. activate the vacuum pump from menu
Change vacuum pump.

Problem with changeover
EV3.
solenoid valve EV4-check
Check for proper power supply to EV4, with direct
components.
discharge/vacuum pump connection changeover.
Problem with heat exchanger Check that exchanger grid and fins are clean.
– check device. Confirm activation of cooling fans.
Problem with autoclave Check free space at rear end to let hot air out.
position. Check that air suction filter under autoclave is clean.
Check autoclave position on supporting surface, it
must ensure that chamber is at proper angle
towards bottom.
ALARMS 48
PP2 TIMEOUT Second pressure pulse Second pressure rise from
did not reach 0.00 bar – 0.80 to 0.00 bar not
time.
Problem with steam
device.
generator.
ST01.
check components.
ALARMS 49
PP2 TIMEOUT Second pressure pulse Second pressure pulse
did not reach 1.00 bar from 0.00 to 1.00 bar not
within timeout. completed within timeout.
Problem with steam
device.
generator.
ST01.
check components.
DISCHARGE TIMEOUT Second pressure drop Second pressure
from 1.00 to 0.10 bar discharge from 1.00 to
not completed within 0.10 bar not completed
timeout. within timeout.
Manual.
EV3.
ALARMS 50
PV3 TIMEOUT Third vacuum pulse Third pre-vacuum not
from 0.00 to –0.80 bar completed within timeout.
not achieved within
timeout.
activation – check To perform this check, it might be a good idea to
component. activate the vacuum pump from menu
Change vacuum pump.

Problem with changeover
EV3.
solenoid valve EV4-check
Check for proper power supply to EV4, with direct
components.
discharge/vacuum pump connection changeover.
Problem with heat Check that exchanger grid and fins are clean.
exchanger – check device. Confirm activation of cooling fans.
Check free space at rear end to let hot air out.
Problem with autoclave
Check that air suction filter under autoclave is clean.
position.
Check autoclave position on supporting surface, it
must ensure that chamber is at proper angle
towards bottom.
ALARMS 51
PP3 TIMEOUT Third pressure pulse Third pressure rise from –
time.
Problem with steam
device.
generator.
ST01.
check components.
ALARMS 52
PPP TIMEOUT Third pressure pulse Third pressure rise from
from 0.00 to process 0.00 to specific pressure
start not completed value for selected cycle
within timeout. (1.10 bar / 2.15 bar) not
completed within timeout.
Observe the indications provided in the User Manual.
Problem with steam
device.
generator.
ST01.
Problem with steam Check and reset safety thermostat if needed. .
generator warm-up – check Check steam generator heating ele ment.
device.
See ST01 – steam generator datas heet.
Problem with manifold Check EV1 for proper power supply and sealing.
check components.
Steam seepage through Clean door gasket and steel ledge thoroughly.
door gasket.
Change door gasket.
Problem with door sealing – Check for steam leaks through door.
check closing system. Check condition and position of door gasket.
Check for proper operation of door closing and
locking system.
activate the closing system from menu
SERVICE/COMPONENT TEST/DOOR – SQ 20,
measuring the current demand from the locking
servomotor.
ALARMS 53
PPD TIMEOUT Chamber Problem with solenoid
depressurization not valves opening
completed within changeover during steam
timeout. discharge.
EV3 shaft will not slide. Clean and/or replace cursor and cursor holder of
EV3 dirty. EV3 – see technical datasheet ST02 - MANIFOLD. .
EV3 not powered on. Check EV3 wiring.
Check EV3 supply.
To perform this check, activate the EV3 from menu
SERVICE - SQ 15.
Check position of autoclave If any feet have been removed, refit them.
feet. Instruct operators.
Adjust feet to achieve proper autoclave inclination.
Check chamber filter Clean chamber filter.
Change chamber filter.
CD A 360 Indication Alarm description Effect / Symptom
PPD TIMEOUT Chamber Problem with solenoid
depressurization not valves opening
completed within changeover during steam
timeout. discharge.
EV3 interrupted. Change cursor and cursor holder of EV3.
EV3 shaft will not slide. Clean and/or replace cursor and cursor holder of
EV3 dirty. EV3. .
EV3 not powered on. Change manifold wiring.
Change fuse.
Change card.
ALARMS 54
LEVELLING TIMEOUT Chamber levelling not Problem with solenoid
completed within valves opening
timeout. changeover during steam
discharge.
EV5 shaft will not slide. Clean or change EV5 shaft.
EV5 dirty. .
EV5 not powered on. Change Ev5 wiring.
Change fuse.
Change card.
Check for air seepage from Check for valve overheating
one of MANIFOLD solenoid Loosen fastening ring nut of coil.
valves.
Change corresponding coil.
Change cursor.
Check that office line voltage is stable.
Install a voltage stabilizer.
Remove any other components connected to the
dedicated autoclave line.
Check inside of solenoid valves.
Clean dirty valve (Loctite, chips, lint,...).
Change cursor holder and cursor.
Change MANIFOLD.
ALARMS 55
2.3 LCD H INDICATIONS
LCD H 150 Indication Alarm description Effect / Symptom
MPX OPEN The MPX pressure Pressuring reading of
sensor is broken. minimum pressure smaller
transducer (=-0.95 bar).
Transducer wiring is
disconnected/damaged. Check wiring and its connections
Transducer connection pipe Check transducer connection pipe
is disconnected/damaged. Change pressure transducer – see ST4 -
Transducer is not operating MPX_PRESSURE SWITCH datasheet.
properly.
MPX SHORT CIRCUIT MPX pressure sensor Pressuring reading of
short-circuited. transducer higher than
maximum pressure (=2.60
bar).
Pressure transducer wiring
is damaged. Check wiring and its connections
Pressure transducer short- Check transducer connection pipe
circuited.
Change pressure transducer – see ST4 -
Pressure transducer is MPX_PRESSURE SWITCH datasheet.
damaged.
56
ALARMS
P/T PROBLEM Pconv/T ratio not Difference between Pconv
balanced (Pconv and
greater than T) during T is greater than 2°C.
sterilization phase.
Drain solenoid valve EV1 Check cursor/cursor holder EV1 – see ST2 -
does not open correctly. MANIFOLD datasheet.
Firmware version not Check/update autoclave FW version – see ST7-FW
updated. update.
Pressure transducer is Change pressure transducer - see ST4-
broken. MPX_PRESSURE SWITCH datasheet.
PT1 – chamber temperature Check proper storage of PT1.
detection fault.
Check by following SERVICE menu /PT1
CALIBRATION - SQ 26.
Change sensor PT1 – see ST5-PT1 datasheet.
Check for steam seepage Clean door gasket and steel ledge thoroughly.
through door gasket.
Reset the alarm to repeat one sterilization cycle.
Change door seal.
Card is damaged. Change the electronic card.

T/P PROBLEM T/Pconv ratio not Difference between T and
balanced (T greater Pconv is greater than 2°C.
than Pconv) during
sterilization phase.
Drain solenoid valve EV1 Check cursor/cursor holder EV1 – see ST2 -
does not open correctly. MANIFOLD datasheet.
updated. update.
broken. MPX_PRESSURE SWITCH datasheet.
Card is damaged. Change the electronic card.
Check for steam seepage Clean door gasket and steel ledge thoroughly.
Reset the alarm to repeat one sterilization cycle.
Change door seal.
ALARMS
57
T ABOVE MAX LIMIT Temperature above Temperature reading of
the MAX limit during temperature sensor PT1 is
the sterilization phase. higher than Tnom + 4°C.
Problem with steam Steam generator maintenance - See ST1-Steam
generator clogging. generator datasheet.
Poor water feed to steam Check/clean feed tank filter.
generator.
Check/change vibration pump water filter.
The vibration pump of the
Check vibration pump.
steam generator is not
operating properly. Check EV6.
Solenoid valve EV6 does To perform this check, it might be a good idea to
not open properly. activate vacuum pump and EV6 from menu
COMPONENTS – SQ 17, that lets you detect water
flowing through the generator and into the chamber.
Temperature sensor PT1 is Change PT1 – see ST5-PT1 datasheet.
damaged.
Card is damaged. Change card.
updated. update.
Check for air seepage Clean door gasket and steel ledge thoroughly.
Change door seal.
ALARMS 58
T BELOW MAX LIMIT Temperature below the Temperature reading
MIN limit during the during sterilization phase is
sterilization phase. lower than T nom (PT1
below 121/134°c).
Steam generator is not Check generator safety thermostat.
working properly.
See ST01-Steam generator datasheet.
There is steam seepage Check pipes connected to chamber rear/lower side
through one of the pipes and their fittings.
connected to the chamber.
Check for air seepage Clean door gasket and steel ledge thoroughly.
through door gasket. Change door seal.
Check quality and quantity Duly instruct the user (refer to user Manual).
of material inside
sterilization chamber.
Temperature sensor PT1 is Change PT1 – see ST5-PT1 datasheet.
damaged.
updated. update.
ALARMS 59
T FLUCTUATING OVER Temperature Difference between max
LIMIT fluctuating beyond the and min temperature
limit (process stage). readings is greater than
5°C.
Steam generator is not Check steam generator.
working properly.
Check generator resistor wiring.
Solenoid valve EV6 does
Check EV6 activation.
not open properly.
Vibration pump is not
working properly. To perform this check, it might be a good idea to
There is air seepage Clean door gasket and steel ledge thoroughly.
Change door seal.
There is air seepage Check solenoid valves EV1/EV3.
through the solenoid valves
See ST2- MANIFOLD datasheet.
EV1/EV3.
PRESSURE ABOVE Pressure above the Pressure is higher than
MAXIMUM LIMIT MAX limit during the 1.24 and 2.31 bar
sterilization phase. (for cycles at 121 and
134°C).
The electronic card is Change card.
damaged.
damaged/not working. MPX_PRESSURE SWITCH datasheet.
ALARMS 60
PRESSURE BELOW Pressure below the Pressure is lower than
MINIMUM LIMIT MIN limit during the 1.03 and 2.02 bar (for
sterilization phase. cycles at 121 and 134°C).
Steam generator is not Check steam generator.
working properly.
Check generator resistor wiring.
Steam generator is
Check EV6 activation.
becoming clogged.
Solenoid valve EV6 does
not open properly. To perform this check, it might be a good idea to
Vibration pump is not
working properly.
There is air seepage Clean door gasket and steel ledge thoroughly.
Change door seal.
updated. update.
There is steam seepage Check pipes connected to chamber rear/lower side
through the pipes connected and their fittings.
to the chamber.
TIMER PROBLEM Wrong retention time Difference between
during sterilization Processor Time and Real
phase. Time Clock is greater than
2 seconds.
damaged. MPX_PRESSURE SWITCH datasheet.
The electronic card is Change the electronic card.
damaged.
ALARMS 61
EXCESSIVE PRESSURE Excessive inside Pressure is higher than
sterilization chamber. 2.38 bar.
damaged. MPX_PRESSURE SWITCH datasheet.
damaged.
PT1 OVERHEATING PT1 overheating Temperature inside
(sterilization chamber). chamber exceeds 138°C.
Chamber temperature Change sensor PT1 – see ST5-PT1 datasheet.
sensor PT1 is damaged.
Vibration pump is not Check EV6 activation.
working properly.
Solenoid valve EV6 does To perform this check, it might be a good idea to
not open properly. activate vacuum pump and EV6 from menu
damaged.
PT2 OVERHEATING PT2 overheating Temperature inside
(steam generator). chamber exceeds 230°C.
Steam generator temperature Change sensor PT2 - see ST1-Steam generator
sensor PT2 is damaged. datasheet.
damaged.
PT3 OVERHEATING PT3 overheating (tube Temperature inside
bundle heating element). chamber exceeds 200°C.
Tube bundle heating Change sensor.
element temperature sensor
PT3 is damaged.
damaged.
ALARMS 62
2.4 LCD S INDICATORS
S 001
LCD Indication Alarm description Effect / Symptom
FLASH MEMORY NOT Flash memory not Failure to access flash
ACCESSIBLE accessible. memory.
Flash memory is damaged. Change the electronic card.
damaged.
S 002
FLASH MEMORY FULL Flash memory full. Flash memory full.
Flash memory is damaged. Change the electronic card.
Flash memory is full. Change the electronic card.
damaged.
S 003
SD CARD NOT SD Card not Failed SD Card reading.
ACCESSIBLE accessible (missing).
Incorrect SD Card Check SD Card proper installation.
positioning/locking.
Check SD Card proper locking.
Change the electronic card.
SD Card is damaged. Change the electronic card.
damaged.
S 004
SD CARD FULL SD card full.
SD memory card is Change the electronic card.
damaged.
SD memory card full. Free SD Card memory space using SERVICE
menu/COUNTER RESET-SQ24.
The electronic card is Change electronic card – see relevant datasheet.
damaged.
ALARMS 63
S 005
USB STICK error USB stick not inserted
during the writing
process.
USB stick is not detected. Refit USB stick.
Check USB stick proper formatting (up to 4G >
FAT/16 Kbit/s – over 4G > FAT32/16 Kbit/s).
Change USB stick.
USB card is damaged. Change the USB card.
damaged.
S 006
USB STICK NOT USB stick not Failure to access USB
ACCESSIBLE accessible (missing). stick.
USB stick is not detected. Refit USB stick.
Check USB stick proper formatting (up to 4G >
FAT/16 Kbit/s – over 4G > FAT32/16 Kbit/s).
Change USB stick.
USB card is damaged. Change the USB card.
damaged.
S 007
USB STICK FULL USB stick full.
USB memory full. Clear USB stick.
64
ALARMS
S 008
SD CARD NOT Impossible to transfer
ACCESSIBLE data to SD card.
USB stick is not detected. Check SD Card proper installation.
Check SD Card proper locking.
Change the electronic card.
damaged.
S 009
NO PRINTER No connection with
printer is detected.
Printer/autoclave wiring not Check wiring.
connected.
Printer off/not powered. Check printer power/switch-on.
damaged.
S 010
PRINTER: PAPER OUT No paper/label roll is
detected in printer.
Roll improperly installed. Check installation.
Roll improperly positioned. Check positioning.
S 011
PRINTER: DOOR OPEN A failed/bad closing of
printer door was
detected.
Door open. Check closing.
Roll improperly positioned. Check positioning.
ALARMS
65
S 012
PRINTER NOT READY A failed/bad set-up of
printer was detected.
Improper set-up. Set up.
S 020
PERFORM BACK-UP Request cycle report Message is displayed at
download. every cycle.
250 cycles have been run Download cycle report, in PDF format, using “NEW”
and report was never item from menu DATA MANAGEMENT/USB.
downloaded.
S 021
DATA OVERWRITING Warning before Message is displayed at
(Classic only) starting to overwrite every cycle.
cycle report data. Proceeding without
downloading will delete
any overwritten cycle.
500 cycles have been run Download cycle report, in PDF format, using “NEW”
and report was never item from menu DATA MANAGEMENT/USB.
downloaded.
ALARMS 66
3.1 CLASSIC SYSTEM RESET
The system can be reset in two alternative ways depending on the type of alarm that
has occurred (see the List of alarm codes further on in this appendix):
1. Pressing the OK button.
2. Following the on-screen instructions and holding down the RESET button for
about 3 seconds:
Holding down the "padlock" button for 3
seconds and the sterilizer door will open.
Tap and hold the RESET button for 3

seconds and the device goes back to the
initial menu.
After the RESET and any technical

operation necessary to eliminate the
fault, the device will be ready to run a
new program.
Never turn off the device until after you have done the reset.
ALARMS 67
4. SERVICE MENU
SERVICE MENU
HYGENIUS AUTOCLAVES– SERVICE MENU
SQ1
From initial screen, access SETUP
menu.
SQ2
From SETUP screen, select SERVICE
menu and confirm with OK to access.
SQ3
To access the SERVICE menu:
select individual fields with OK,
enter PIN 0829 using keys + / -
confirm each input with OK
PIN 0829 is valid for all autoclaves of
the HYGENIUS series.
SERVICE MENU 68
SQ4
After accessing the SERVICE menu, a
vertical scroll menu with the following
options is displayed:
- Component test
- Test cycles
- Counter reset
- Initial settings
- PT1 calibration
- Report management
- Service customization
- User management
- REF input
- SN input
- H2O filling
- MPX calibration
SQ5
Selecting COMPONENT TEST and
pressing OK to confirm displays a
options:
- Solenoid valves
- Other components
- Door
SERVICE MENU 69
SQ6
Select the SOLENOID VALVES menu
and press OK confirm.
The screen shows the states of the five
solenoid valves of the manifold; state
labels are as follows:
solenoid valve open

solenoid valve closed
During a COMPONENT TEST, with the
door open, all solenoid valves (EV) are
powered off.
The FAN indicator shows the On/Off
state of heat exchanger fans.
SQ7
From the SOLENOID VALVES menu,
you can turn the individual solenoid
valves and radiator fans on and off.
Solenoid valves and fans can be
selected using the commands
and selection is confirmed by pressing
OK.
After the desired solenoid valve has

been selected, it can turned on/off using
the commands
Several elements can be turned on at

the same time to check specific sections
of the autoclave hydraulic circuit.
SERVICE MENU 70
SQ8
Select the OTHER COMPONENTS
menu and press OK to confirm.
The screen shows the following
components:
- BH – chamber tube bundle
heating element
- SG – generator heating element
- VP – vacuum pump
- WP – water injection pump/EV6
The following values are also displayed:

- PT2 – steam generator
temperature
- PT3 – chamber tube bundle
heating element temperature
- chamber pressure
SQ9
From the OTHER COMPONENTS
menu, you can establish the state of
individual components, which may
selected using the commands
and pressing OK to confirm you
selection.
After the desired function has been
confirmed, it can turned on/off using the
commands .
The BH-tube bundle heating element
activating is indicated by value PT3-
tube bundle heating element
temperature increasing.
The SG-generator heating element
activating is indicated by value PT2-
steam generator temperature
increasing.
A safety timeout is provided for the BH
and SG functions, so that the relevant
component is turned off after 120”.
SERVICE MENU 71
SQ10
Select the DOOR menu and press OK
to confirm.
The following indicators are displayed:

- μSw Door – door manual closing
- μSw Lock – door lock
- open – door open microswitch
- I motor – motor current draw
During the door closing and locking

phases, the variations in parameter I
motor are shown by the digital bar at the
bottom of the DOOR screen.
SQ11
From the DOOR menu, you can
establish:
- door state (closed/locked)
- the states of closing system micros
witches
- the motor current draw values
during the different door closing
phases
Door unlock can be activated manually.
SERVICE MENU 72
COMPONENT TEST – FUNCTIONAL CHECKS –
SOLENOID VALVES/OTHER COMPONENTS
SQ12
The following menus can be used:
- SOLENOID VALVES
- OTHER COMPONENTS
These menus are used to test individual
component or to activate and test
several components at the same time to
check the different functions that are
supposed to be performed during a
sterilization cycle.
To activate several components
available in the two menus at the same
time, you may toggle between the two
menus using the command ,
which changes between menus while
retaining the previously selected
commands.
SERVICE MENU
73
SQ13 – CHECK EV5 FOR PROPER OPENING/CLOSING
Close the door, access the SERVICE
menu and select COMPONENT TEST.
- From the SOLENOID VALVES
menu, activate EV1 and EV4.
- Go to the OTHER COMPONENTS
menu.
- Activate VP – vacuum pump.
- Go to the SOLENOID VALVES
menu.
With EV5 closed (not activated), there
should be no air suction from the middle
of the bacteriological filter.
With EV5 open (activated), there should
be air suction from the middle of the
bacteriological filter.
De-activate the components after
completing the test.
SERVICE MENU 74
SQ14 – CHECK EV1/EV3 FOR PROPER CLOSING
- Close the autoclave door
menu, activate EV1 and EV4
menu
- Note reading – chamber pressure
- Activate VP – vacuum pump
If EV1/EV3 are closing properly, reading

– chamber pressure will not change.
With the door open, proper closing of
EV1/EV3 is confirmed when there is not
suction from:
- Steam outlet, top/rear section of
chamber for EV1
- Chamber filter coupling for EV3
SERVICE MENU 75
SQ15 – CHECK FOR EV1 OPENING
menu, activate EV4.
menu.
- Note reading – chamber
pressure.
If EV1 is open (powered off), reading

– the chamber pressure will decrease.
With the door open, EV1 opening can

be confirmed by checking the effect of
suction from the steam outlet, top/rear
section of chamber.


menu, activate EV3 and EV4
menu
- Note reading – chamber pressure
- Activate VP – vacuum pump
If EV3 is open (powered on), reading

– the chamber pressure will decrease.
With the door open, EV3 opening can

be confirmed by checking the effect of
suction from the chamber filter coupling.

SERVICE MENU
76
- Close the autoclave door.
menu, activate EV2 and EV4.
menu.
- Note reading – chamber
pressure.
With EV2 open (powered on), reading

– the chamber pressure will
decrease and stabilize at around
0.035/0.040 bar, and will not drop
further.
Test example:
- The chamber pressure reading
0.000 bar.
- Chamber pressure reading of –
0,038 bar confirms that EV2 opened
correctly.

SQ18 – CHECK FOR WATER INJECTION PUMP/EV6 ACTIVATION
Keeping the autoclave door open, from
menu OTHER COMPONENTS:
- Activate WP – injection pump/EV6
- Check that water is supplied to
chamber properly
Perform test only if PT2 - steam

generator temperature is lower than
70°C.
SERVICE MENU 77
SQ19 – CHECK FOR TUBE BUNDLE HEATING ELEMENT ACTIVATION
menu, activate:
- BH - chamber tube bundle heating
element
Proper activation is indicated by

parameter PT3 – chamber tube bundle
increasing.
SQ20 – CHECK FOR GENERATOR HEATING ELEMENT ACTIVATION

menu, activate:
- SG – generator heating element
Proper activation is indicated by

parameter PT2 – steam generator
increasing.
SERVICE MENU 78
COMPONENT TEST – FUNCTIONAL CHECKS – DOOR
SQ21 - CHECK FOR DOOR MICROSWITCH ACTIVATION
From the DOOR menu, close manually

the door and confirm that the μSw door
indicator is activated.
The motorized door-locking device
remain in Open position.
The indication for the micro switches is

as follows:
micro switch closed
Activate door lock with command

After locking, the I motor indicator
should read 0,5/0,7A.
Both μSw door and μSw Lock are
closed
With command , you can unlock

the door and bring it into closed position
while keeping both μSw door and Open
micro switches activated.
SERVICE MENU
79
SERVICE MENU – TEST CYCLES
SQ22
Selecting TEST CYCLES displays a
options:
- No vacuum
- Continuous cycle
SQ23
Selecting NO VACUUM displays the
start-up screen for cycle Solids 134°C.
With command , you can activate

the cycle, which will be performed
without the pre-vacuum phase.
After the warm-up phase, the pressure

rise is performed to achieve the process
values of 134°/2.10bar, a condition that
will be maintained for 4’.
This special cycle, which has no alarms,
is designed to detect any steam leaks
from chamber, door, generator and
connected tubes.
SERVICE MENU 80
SQ24
Selecting CONTINUOUS CYCLE
displays the cycle selection screen.
When one of the available cycles is

selected and activated, that cycles will
run and repeated automatically with a 5’
pause between subsequent cycles.
SERVICE MENU – COUNTER RESET

SQ25
Selecting COUNTER RESET activates
the reset selection screen.
WARNING
When counter reset is confirmed, the
archive of performed cycles will be
deleted.
SERVICE MENU 81
SERVICE MENU – INITIAL SETTINGS
SQ26
Selecting – INITIAL SETTINGS
activates the factory settings screen.
WARNING
When the reset operation is confirmed,
the custom settings selected by user will
be deleted; language selection will be
retained.
SERVICE MENU 82
SERVICE MENU – PT1 CALIBRATION
SQ27
Selecting PT1 CALIBRATION displays
the check/edit screen for the typical
reading of sensor PT1 at 130.4°C.
This value is indicated on sensor PT1
and is stored at the factory.
If the PT1 sensor is replaced, proceed

as follows:
- note typical reading of new sensor
- activate setup system by pressing
OK
- change reading using + / - as
required
- press OK to confirm.
The system allows a maximum variation

range of +/- 10 ohm with respect to a
nominal reading of 1500 ohm at
130.4°C.
SERVICE MENU 83
SERVICE MENU – REPORT MANAGEMENT
SQ28
Selecting REPORT MANAGEMENT
displays a vertical scroll menu with the
following options:
- Print tech. report (function not
active)
- Download tech. report
- Download error log
Download tech. report transfers a .cvs

file (compatible with MS Excel)
containing information on the activation
times of the different components to
USB.
Download error log transfers a .cvs file

(compatible with MS Excel) containing
information on the alarms generated by
the autoclave to USB.
SERVICE MENU 84
SERVICE MENU – SERVICE CUSTOMIZATION
SQ29
Selecting SERVICE CUSTOMIZATION
displays four counters. These are cycle
counters for the following maintenance
operations:
- Lubrication of closing
system/chamber filter
- Bacteriological filter
replacement/Cleaning of tank and
dust filter
- Door gasket replacement
- General overhaul
The values can be modified, i.e. the

original values can be set lower as
follows:
- Select value using
- Press OK to confirm
- Change value using + / -
SERVICE MENU
85
SERVICE MENU – USER MANAGEMENT
SQ30
Selecting USER MANAGEMENT
displays the user list management
screen, which is normally used by office
personnel.
When you operate from menu

SERVICE/USER MANAGEMENT, the
system will request no password to
access the different users, including the
administrator.
You can make changes, delete or add

users, change authorizations.
WARNING
Confirming any changes will delete the
previous configuration settings.
SERVICE MENU 86
SERVICE MENU – REF INPUT
SQ32
The REF INPUT function lets you enter
the product code specific to each
individual model.
This code is stored at the factory and
needs only be input after the electronic
card has been replaced. The procedure
is outlined below.
From the SERVICE MENU, select REF
INPUT and:
- Insert a USB memory with the
original FW version or a later
version
- Ensure that the USB memory is
sensed and this is confirmed by two
beeps
- Press OK to confirm; this will display
the list of product codes from the
same series.
- The proper code is reported on the
ID plate on the rear panel
- Select the proper code
SERVICE MENU 87
SERVICE MENU – SN INPUT
SQ33
Function SN INPUT lets you store the
unique serial number of each individual
autoclave.
The serial number is stored at the

factory using commands + / - to change:
- 2 figures that denote year of
manufacture
- 2 progressive groups of figures
- and press OK to confirm
The two letters, unique to each model,

are automatically assigned when
product code is entered (see REF
INPUT).
SERVICE MENU 88
SERVICE MENU – WATER FILLING TIMES
SQ34
Selecting the WATER FILLING TIMES
menu displays the following indicators:
- Max filling – maximum feed tank
level
- Min filling – minimum feed tank level
- Outlet – supply to auto filling device
- Time – auto filling activation time
The automatic filling activation time is

shown by the sliding bar found under
the Time indicator.
The two counters indicate the times

expressed in seconds for:
Alarm – error indication during the first

automatic filling phase, from an empty
tank up to minimum level.
Filling – time duration of second tank

filling phase, from minimum level to full
tank, without reaching maximum level.
The WATER FILLING TIMES menu

shows the ALARM and FILLING times
stored at the factory for:
- external filling pump 150/150
- EV AUX 1000/1000
SERVICE MENU 89
SERVICE MENU – LEVEL SENSOR TEST
SQ35
The minimum/maximum level indicators
shown in the WATER FILLING TIMES
menu enable manual testing of level
sensors.
This test must be performed with an
empty feed tank to facilitate access to
the two level sensors.
MAXIMUM LEVEL SENSOR

Note reading of Max filling -
indicator, then actuate level sensor
manually and note reading of Max filling
- indicator.
MINIMUM LEVEL SENSOR

With an empty feed tank, note reading
of Min filling - indicator, then actuate
level sensor manually and note reading
of Min filling - indicator.
SERVICE MENU 90
SQ36 – EV AUX TIME STORAGE
After connecting the EV AUX KIT and
confirmed connection from the
PREFERENCES menu, access the
WATER FILLING TIMES menu.
When the first filling stage from an

empty tank is activated, the Outlet –
supply to automatic filling dev. is
activated, as well as countdown from
1000”.
Note the filling level until the minimum

level sensor is covered, which is
indicated by the Min filling indicator
turning off.
A second countdown from 1000” for the

second filling phase is activated.
Note filling level up to nearly Max filling,

without activating it. At the same time,
note the TIME indicator reading and
calculate the difference between 1000"
and this reading.
Enter this difference in counters Alarm
and Filling and press OK to confirm.
SERVICE MENU 91
SQ37
Menu - MPX CALIBRATION lets you
correct any differences between the
pressure value displayed and the
pressure measured with a reference
pressure gauge.
The three counters displayed can be

modified and represent:
- P+ pressure value correction at
+2.10 bar
- P0 pressure value correction at
0 bar
- P- pressure value correction at –
0.80 bar
In order to determine whether the

pressure value displayed is accurate,
you will need to connect the pressure
transducer to an external device
capable of reproducing the 3 control
conditions:
- P+ positive pressure +2.10 bar
P0 atmospheric pressure 0.00 bar
P- negative pressure –0.80 bar
The device must be equipped with a

reference pressure gauge to allow a
comparison with the displayed pressure
value.
The displayed value can be changed in

0.001 bar steps.
SERVICE MENU 92
TECHNICAL DATASHEETTECHNICAL DATASHEET ST01 - STEAM
GENERATOR
4.1.
The STEAM GENERATOR is installed HYGENIUS models. It is secured to the
rear/left upright of autoclave frame and can be accessed after removing the left side
panel and the rear panel.
WARNING:
The STEAM GENERATOR can become very hot and may reach
temperatures above 150°C; check the reading of PT2 – generator
temperature sensor in the SERVICE menu before removing the side
covers.
Power off the autoclave and disconnect the power mains cord before
removing the side covers.
The GENERATOR is protected by a insulating covering that must be refitted after
completing any maintenance operation; two double insulating washers are required
at each fastening point to the frame and they must be refitted correctly.
GENERAL CHARACTERISTICS
The generator is made of a cylindrical outer body and a grooved inner core that are
connected by a threaded coupling; the two sections can be separated for
maintenance purposes.
Pressure is sealed between cylindrical body and inner core thanks to two O-ring
placed on the core; these O-rings must be replaced each time the generator is
disassembled.
The cylindrical body accommodates:
- PT2 - generator temperature sensor, housed in a suitable seat, secured with a
retaining screw; PT2 can be removed and replaced.
- Safety thermostat – 300°C operation threshold – manual reset.
- Water inlet fitting – bottom.
- Steam outlet fitting – top.
The grooved inner core accommodates the heating element –

1000+1000W/115+115V – removable.
The heating element has 3 wires and is made up of two sections rated 13.3 ohm
each (total 26.6 ohm)
Resistance can be measured directly at the points where the heating element is
connected to the general electronic card using a common tester.
TECHNICAL DATASHEET 93
SERVICE OPERATIONS
Replacing the safety thermostat
The thermostat can be removed without taking off the external heat insulation.
Disconnect the wiring connected to the safety thermostat, remove the 2 fastening
screws, position the new thermostat and secure it using the 2 screws, reconnect the
wiring.
Replacing the heating element

- Remove the steam generator from its mount removing the 2 fastening screws
and their double insulating washers.
- Open the lower section of the heat insulator, remove the retaining screw that
holds the heating element in place, withdraw the heating element from its seat in
the middle of the central core
- Insert the new heating element gradually to let air flow out and push until fully
home
- Lock the heating element in place using the retaining screw, placing the washer
into the groove in the outer casing of the heating element.
- Refit the heat insulation, refit the steam generator on its mount using the 2
fastening screws and the double insulating washers
Replacing the PT2 sensor

- Disconnect PT2 wiring from the general electronic card
- Remove the retaining screw and pull the sensor out of the seat in the generator
outer body
- Position the new sensor and secure it in place with the retaining screw
- Re-connect PT2 wiring to general electronic card
- Refit the heat insulation, refit the steam generator on its mount using the 2
fastening screws and the double insulating washers
Cleaning inside of generator

- Disconnect the reinforces inlet and outlet tubes removing the 2 stainless steel
clamps.
- Disconnect the wiring connected to the safety thermostat.
- Disconnect PT2 wiring from the general electronic card.
- Remove the external heat insulation.
- Lock the central core from the 2 suitable flats at the sides of the heating element
seat.
- Unscrew generator outer body, and withdraw the central core.
- Remove any limestone residue in the grooves and passages of the central core.
- Clean the inside of generator body and the 2 water and steam passages.
- Remove the 2 O-rings from the central core and replace with new O-rings.
- Screw the central core fully home onto the outer body.
- Refit the external insulation and the aluminum-fastening strap.
TECHNICAL DATASHEET
95
- Refit the generator on its mount using the 2 fastening screws and the
double insulating washers.
- Reconnect the reinforced tubes and secure them in place using new stainless
steel clamps.
- Reconnect the safety thermostat wiring and the PT2 wiring.
GENERATOR HEATING ELEMENT TO GENERAL CARD CONNECTION
1 Autoclave general card

2 Heating element - 230V connection
3 Safety thermostat.
TECHNICAL DATASHEET
96
PT2 SENSOR TO GENERAL CARD CONNECTION
1 Electronic card
2 PT2 wiring connection
1. Water inlet
2. Heating element
3. Cylindrical outer
body
4. PT2 sensor
5. Safety thermostat
6. Inner core
7. Steam outlet
1. Steam
generator
complete with
heat insulation.
4.2. TECHNICAL DATASHEET ST02 - MANIFOLD
The MANIFOLD is installed on all “B CLASSIC/FUTURA” models. It is found on the
left side of the chamber and is easily accessed after removing the left side panel.
There are two screws that secure it to autoclave bottom and are accessible from
above.
For maintenance purposes, the MANIFOLD can be removed from inside the
autoclave because it can be displaced with no need to disconnect its connection
cables and the wiring of solenoid valves.
WARNING:
The solenoid valves feature 24Vdc class-H coils suitable for temperatures up to
150°C
Power supply to solenoid valves is electronically controlled and provides 24Vdc
inrush voltage; power supply is reduced to 16Vdc during regular operation.
Connections are made with one common (black) wire and a specific wire for each
individual solenoid valve; note the colour of the specific wire before disconnecting
any wires.
The five solenoid valves are clearly identified with their corresponding numbers
stamped on the read end of the MANIFOLD, close to each valve. EV1 and EV3
control steam discharge from the chamber and feature stainless steel seat.
FUNCTIONAL CHARACTERISTICS OF SOLENOID VALVES

- EV1 2-way, normally open NO
- EV2/EV3/EV5 2-way, normally closed NC
- EV4 3-way
In the event of a black-out, EV1-NO restores pressure balance in the chamber to

that the door can be opened manually.
OPERATION
EV1 NO is connected to the top drain of the chamber; it controls steam discharge
during the pressure release phases (vacuum pulses, cycle end, drying pulses). It is
powered on (closed) during all chamber pressure maintenance phases.
EV2 NC is connected to the MANIFOLD filter. It controls the supply of air at
atmospheric pressure into the circuit outside the chamber, and prevents pressure to
reach negative values which could otherwise lead to starting problems with the
vacuum pump.
EV3 NC is connected to the bottom drain of the chamber (chamber filter) and
controls condensate discharge during pressure release phases.
EV4 3-way is connected to heat exchanger, vacuum pump and drain tank; it
controls the direct discharge of condensed steam to the tank; when chamber
pressure drops to P=0.10 bar, it directs the outlet flow from the heat exchanger to the
vacuum pump.
EV5 NC is connected to the bacteriological filter and controls the flow of filtered air to
the chamber during the balancing phase at cycle end; the filtered air flow is
conveyed to the chamber through the seat of EV1, which is closed during the
pressure balancing phase.
SERVICE OPERATIONS
Each solenoid valve can maintained individually to:
- Check and clean solenoid valve seat.
- Check and clean cursor.
- Change the complete cursor/cursor holder assembly.
For solenoid valves EV1 – EV2 – EV3 – EV5, proceed as follows:

- Disconnect the power supply wiring (2 wires) from the coil; make sure to note the
colour of the 2 wires.
- Unscrew the coil retaining nut.
- Withdraw the coil from the cursor holder assembly.
- Unscrew the cursor holder assembly using a hexagon key; do not apply any
tools to the cylindrical body of the cursor holder assembly.
To refit, begin by positioning the cursor holder assembly, fasten the coil and connect
the wiring.
For EV4 only, proceed as follows:

- Disconnect the power supply wiring (2 wires) from the coil; make sure to note the
color of the 2 wires.
- Disconnect the tube that runs to the upper fitting by removing the retaining
clamp.
- Unscrew the top tube fitting together with the intermediate fitting.
- Unscrew the coil retaining nut.
- Withdraw the coil from the cursor holder assembly.
- Unscrew the cursor holder assembly using a hexagon key; do not apply any
tools to the cylindrical body of the cursor holder assembly.
To refit, begin by positioning the cursor holder assembly, fasten the coil, fit the
intermediate fitting/top tube holder (use thread locker), connect the wiring, and
connect the tube to the upper fitting locking in place with the new stainless steel
clamp.

1. EV4 – discharge to used water tank.
2. EV5 – air inflow from bacteriological filter.
3. EV1/EV3 – outlet to exchanger.
4. EV1 – inflow of steam discharge-high output
EV1 – balancing air outlet. Chamber pressure from EV5/bacteriological filter.
5. Air inlet.
6. EV3 – inflow from chamber discharge-chamber filter
7. EV4 – inflow of condensed steam from heat exchanger.
8. EV4 – outflow to vacuum pump.
1. Manifold

4.3. TECHNICAL DATASHEET ST03 - DOOR GEARMOTOR ASSEMBLY
The autoclaves are equipped with a motorized door closing and locking device that
uses a double hook system driven by the door gear motor.
The door servomotor assembly is secured to the left side the chamber and can be
accessed after removing the right side panel and the relevant lower cap.
The servomotor assembly includes a vertically mounted gear motor that drives
double hook system.
When in motion, the double hook system runs into the double fork installed on
the porthole aluminum support, bringing the porthole closer to the jamb until it
closes and the door is locked.
The locking phase can start only after manually closing the door.
The opening control enables the servomotor to move backwards and release the
door, which r e m a i n o n c l o s e d p o s i t i o n ; the door can be open manually.
SERVICE OPERATIONS
WARNING:
Replacing the gearmotor
Slide the autoclave partially out of the installation top counter in order to have free
access to lower cap
With the door open, remove the s c r e w s a n d t h e l o w e r c a p to have free access
to the 4 screws securing the door gear motor to double hook support
Withdraw the gear motor carefully, sliding it towards the unit base hole.
Be careful to the brass joint, positioned between the gear motor and the double hook
system.
Slide the new gear motor into its position by specific attention the brass joint
Position the gear motor and firmly secure it by means of the 4 screws, well tightened.
Replacing the door closed microswitch
Replacing the open hook microswitch
Replacing the closed hook microswitch

1
1 – door close sw, manually activated
2 – closed hook sw, activated by the double hook reaching the lock position
3 – open hook sw, activated by the double hook after reaching the open position
4 – gear motor
TECHNICAL DATASHEET
103
1

4.4. TECHNICAL DATASHEET ST04 - PRESSURE TRANSDUCER - SAFETY
PRESSURE SWITCH
The autoclaves are equipped with the following devices that are connected to the
chamber:
- Pressure transducer
- Safety pressure switch
PRESSURE TRANSDUCER
The pressure transducer is connected to the chamber by a TEFLON tube; it detects
internal pressure during the different cycle phase and sends an electric input to the
general electronic card.
This input signal, combined with the temperature readings, ensures that the
sterilization cycle is managed properly.
The transducer is installed at the side of the general electronic card and can be
accessed after removing the right side cover panel and, if necessary, the right upper
cross member.
The pressure transducer is not serviceable; if it needs replacing, proceed as follows:
- Power off the autoclave from the main switch and disconnect the power cord.
- Remove the right external cover panel.
- Remove the protective cover of the general electronic card, which is held in
place by 3 snap locks.
- Fully unscrew the locking ring nut of the TEFLON tube at the lower fitting of the
transducer and detach the tube from the fitting.
- Disconnect the transducer wiring from the general electronic card.
- Loosen the transducer retaining nut and slide the transducer off its support.
- Fit the new component in the seat in the support and secure with the retaining
nut.
- Re-connect the transducer wiring to the general electronic card; the connector
has a mounting position, be sure to observe it.
- Trim off the end portion of the TEFLON tube so as to eliminate the portion of
tube that had been sitting on the fitting.
- Fit the Teflon tube onto the fitting and secure it in place with the locking ring nut.
NOTE: Use great care when performing this operation; to not overtighten or you
will damage the tube.
SAFETY PRESSURE SWITCH

The safety pressure switch is connected through a TEFLON tube and disconnects
power supply to the door closing gearmotor when pressure inside the chamber is
positive.
At pressures below 0.40 bar:

- The pressure switch is off.
- The gearmotor power supply contact is closed (red and white wires).

- The safety contact is open (red and black wires).
- The motorised door opening system can be activated.
At pressures above the 0.40 bar limit:

- The pressure switch is on (safety mode).
- The gearmotor power supply contact is open.
- The safety contact is closed and short-circuits the gearmotor control relay.
- The motorised door opening system cannot be activated.
The safety pressure switch is not serviceable; if it needs replacing, proceed as

follows:
- Power off the autoclave from the main switch and disconnect the power cord
- Remove the right external cover panel
place by 3 snap locks
- Fully unscrew the locking ring nut of the TEFLON tube at the lower fitting of the
pressure switch and detach the tube from the fitting
- Disconnect the wiring from the pressure switch; make sure to note the positions
of the 3 wires
- Loosen the pressure switch retaining nut and slide the pressure switch off its
support
- Fit the new component in the seat in the support and secure with the retaining
nut
- Re-connect the pressure switch wiring to the general electronic card; be sure to
observe the correct positions of the wires
- Trim off the end portion of the TEFLON tube so as to eliminate the portion of
tube that had been sitting on the fitting
- Fit the TEFLON tube onto the fitting and secure it in place with the locking ring
nut
NOTE: Use great care when performing this operation; to not overtighten or you
will damage the tube.

1. Pressure
transducer.
2. Safety pressure
switch.
1. Pressure transducer.
2. Electronic card.

4.5. TECHNICAL DATASHEET ST05 - PT1 SENSOR -
CHAMBER TEMPERATURE SENSOR
Temperature inside the chamber is measured by a sensor termed PT1, which sits in
the central/lower of the chamber back wall; this position ensure more accurate
readings and reduces the chances of the sensor contacting the load placed inside
the chamber.
The sensor is a PT1000 and features the following resistance ratings:
- 1000 Ω at 0°C
- 1500 Ω at 130.4°C
In addition, to ensure improved accuracy, the actual resistance reading given the by
sensor at 130.4°C is stamped on the sensor
This value is stored in the autoclave at the factory and must be checked/modified
when the sensor is replaced (ref. SERVICE MENU – SQ26)
The PT1 sensor is connected to the general electronic card, which incorporates a
sensor input calibration circuit, which automatically checks calibration during
operation.
Automatic input calibration is provided for the other sensors as well:
PT2 – steam generator
PT3 – chamber tube bundle heating element
This eliminates the need for manual calibration.
SERVICE OPERATIONS
Replacing PT1
- Power off the autoclave from the main switch and disconnect the power cord.
- Remove the right side cover and the metal rear cover to gain access to the
general electronic card and the rear area of the chamber.
place by 3 snap locks.
- Disconnect the PT1 sensor wiring from the general electronic card.
- Loosen the fastening ring nut of the PT1 sensor to release it completely.
- Extract the PT1 sensor together with the ring nut from the seat in the chamber
back wall.
- Mark the new PT1 sensor at a position 60mm away from the sensor end and
measure its actual reading at 130.4°C, which is stamped on the wiring output
terminal.
- Fit a new fastening ring nut and a new taper fitting onto the new sensor.
- Insert the sensor into its seat; make sure not to distort or bend the sensor.
- Secure the sensor using the ring nut; when the ring nut is properly tightened.
- Position and connect the sensor wiring; the connector has a mounting position,
be sure to observe it.

When you have installed the new sensor and refitted the card protective
cover and the external covers, you will need to check/modify the PT1 value
stored at the factory as follows:
- Activate the device.
- Access the SETUP menu.
- Access the SERVICE menu using password 0829.
- Select the PT1 CALIBRATION menu (ref. SERVICE MENU – SQ26).
- Compare the value at 130.4°C stored with the actual reading of the new PT1.
- Change and confirm the new value if needed.
1. PT1 SENSOR
complete with
fastening ring nut.
2. PT1 actual
reading at
130.4°C.

1. Electronic card.
2. PT1 wiring connection.

4.6. FIRMWARE UPDATE
HYGENIUS AUTOCLAVE FIRMWARE UPDATE
The firmware is updated automatically as the new firmware is uploaded to the
autoclave from a USB pen drive.
Following is the proper update procedure after receiving the Firmware updated files
as e-mail attachments.
- Receive latest update in .ZIP file from FONA

- Extract the 2 files contained in the folder.
- Copy the 2 files to an empty USB pen drive.
- Switch off the autoclave.
- Insert the USB pen drive into the port on one side of the display.
- Switch on the autoclave.
The update process will start automatically and take about 2 minutes; depending on
the number of cycles performed, the process may last up to 7-8 minutes.
The update process is indicated by certain warning sounds.
During the initial phase, the display screen will turn BLACK, and then the wording
“WAIT” is displayed.
A message reading “USB error” may appear for a few moments, please disregard it
Do not remove the USB pen drive while the update process is running!
When the updated is completed, the autoclave is restarted automatically and the
display screen will default to the standard START menu.
- Switch off the autoclave
- Remove the USB pen drive
To confirm that t h e update p r o c e s s w a s completed successfully, go to:

Menu DATA>SYSTEM INFORMATION
Read and verify the FW version installed.
End of procedure.
111
TECHNICAL DATASHEET
Please contact FONA after sales when you find some discrepancy in this
service manual!
Sincerely,
Your FONA support team

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FONA HYGENIUS 17/22

Code Rev Date

In the STAND-BY ON mode the chamber heater is powered on in order to keep:

On STAND BY ON mode and door closed solenoid valve EV5 is activated.

STAND BY - components on state

Drain Drain Drain

Off Off Off Off

EV2 Air inlet

Drain Drain Drain

Section On Off Off On

Section Off On Off Off

Drain Drain Drain

Drop On Off On Off

Steam Off Off Off Off

Drain Drain Drain

Drain Drain Drain

Drain Drain Drain

Drain Drain Drain

Direct Off Off Off Off

Drain Drain Drain

Drain Drain Drain

Direct Off Off Off Off

Drain Drain Drain

Drain Drain Drain

Pressure Off Off Off On

LCD E 000 Indication Alarm description Effect / Symptom

LCD E 010 Indication Alarm description Effect / Symptom

LCD E 042 Indication Alarm description Effect / Symptom

Check door cap.

LCD A 032 Indication Alarm description Effect / Symptom

LCD A 112 Indication Alarm description Effect / Symptom

Vacuum pump maintenance.

Change vacuum pump.

Change vacuum pump.

LCD H 401 Indication Alarm description Effect / Symptom

1. Pressing the OK button.

Tap and hold the RESET button for 3

After the RESET and any technical

solenoid valve open

After the desired solenoid valve has

Several elements can be turned on at

The following values are also displayed:

The following indicators are displayed:

During the door closing and locking

If EV1/EV3 are closing properly, reading

If EV1 is open (powered off), reading

With the door open, EV1 opening can

De-activate the components after

SQ16 – CHECK FOR EV3 OPENING

If EV3 is open (powered on), reading

With the door open, EV3 opening can

De-activate the components after

With EV2 open (powered on), reading

De-activate the components after

Perform test only if PT2 - steam

Proper activation is indicated by

SQ20 – CHECK FOR GENERATOR HEATING ELEMENT ACTIVATION

Proper activation is indicated by

From the DOOR menu, close manually

The indication for the micro switches is