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TECHNICAL MANUAL - B CLASSIC / B FUTURA / S CLASSIC
ALARMS
LCD H 400 Indication Alarm description Effect / Symptom
P/T PROBLEM
Pconv/T ratio not balanced
(Pconv greater than T) during
sterilization phase.
Difference between Pconv and
T is greater than 2°C.
Possible causes / Checks Solution
Drain solenoid valve EV1
does not open correctly.
Check cursor/cursor holder EV1 – see ST2 - MANIFOLD datasheet.
Firmware version not
updated.
Check/update autoclave FW version – see ST7-FW update.
Pressure transducer is
broken.
Change pressure transducer - see ST4-MPX_PRESSURE SWITCH datasheet.
PT1 – chamber
temperature detection fault.
Check proper storage of PT1.
Check by following SERVICE menu /PT1 CALIBRATION - SQ 26.
Change sensor PT1 – see ST5-PT1 datasheet.
Check for steam seepage
through door gasket.
Clean door gasket and steel ledge thoroughly.
Reset the alarm to repeat one sterilization cycle.
Change door seal.
Card is damaged. Change the electronic card.
LCD H 401 Indication Alarm description Effect / Symptom
T/P PROBLEM
T/Pconv ratio not balanced
(T greater than Pconv) during
sterilization phase.
Difference between T and
Pconv is greater than 2°C.
Possible causes / Checks Solution
Drain solenoid valve EV1
does not open correctly.
Check cursor/cursor holder EV1 – see ST2 - MANIFOLD datasheet.
Firmware version not
updated.
Check/update autoclave FW version – see ST7-FW update.
Pressure transducer is
broken.
Change pressure transducer - see ST4-MPX_PRESSURE SWITCH datasheet.
Card is damaged. Change the electronic card.
Check for steam seepage
through door gasket.
Clean door gasket and steel ledge thoroughly.
Reset the alarm to repeat one sterilization cycle.
Change door seal.
LCD H 402 Indication Alarm description Effect / Symptom
T ABOVE MAX LIMIT
Temperature above the MAX limit
during the sterilization phase.
Temperature reading of temperature sensor PT1 is
higher than Tnom + 4°C.
Possible causes / Checks Solution
Problem with steam
generator clogging.
Steam generator maintenance - See ST1-Steam generator datasheet.
Poor water feed to steam
generator.
The vibration pump of the
steam generator is not
operating properly.
Solenoid valve EV6 does
not open properly.
Check/clean feed tank lter.
Check/change vibration pump water lter.
Check vibration pump.
Check EV6.
To perform this check, it might be a good idea to activate vacuum pump and EV6 from
menu SERVICE/COMPONENT TEST/OTHER COMPONENTS – SQ 17, that lets you
detect water owing through the generator and into the chamber.
Change vibration pump.
Temperature sensor PT1 is
damaged.
Change PT1 – see ST5-PT1 datasheet.
Card is damaged. Change card.
Firmware version not
updated.
Check/update autoclave FW version – see ST7-FW update.
Check for air seepage
through door gasket.
Clean door gasket and steel ledge thoroughly.
Change door seal.