Fault Diagnosis DAC Professional
Fault 6: Ventilation
FAULT 6: Ventilation
Triggered by:
The monitoring time limit Uet7 for the ventilation of the chamber until reaching pressure P12 was
exceeded
Causes/ Remedy
Operating fault/Check by personnel:
•
The sterile filter is dirty, this will the autoclave show with the display “Replace sterile filter”
•
As a check, remove the filter and carry out a sterilization cycle with no load. Exchange sterile filter
Appliance fault / Repair by technical service personnel
►
Ventilation solenoid valve does not open
•
Solenoid valve blocked mechanically (soiling)
Open valve casing, clean or exchange valve
•
Control for ventilation solenoid valve faulty, output ACOUT8 giving
permanent signal (relay stuck)
Exchange CPU-board
►
Pressure sensor/ Analog input AIN 3 measures too low
•
Pressure sensor signal/ Signal processing to control too low, Pressure signal after ventilation still < P12,
follow up fault would normally be “Fault 35: Sterilization TO”
Check that the pressure displayed in “Diagnosis-Program“/ “Analog input“ is plausible, displayed value
should be current air pressure (door open)
See also under “Fault 35 Sterilization TO“ – “Pressure sensor, analog input AIN 3 measures too low“
Exchange pressure sensor
If a fault is still reported: Exchange CPU-board
►
Parameter P12 wrong
In “Service Program“ check that the parameter setting P12 = 800 is correct, if necessary update setting
(particularly for installation at high altitudes).
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Servicemanual DAC Professional
Summary of Contents for DAC PROFESSIONAL
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Page 56: ...Sirona DAC Professional Process 09 21 2006 54 61 Servicemanual DAC Professional...
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