Sirona DAC PROFESSIONAL, Service Manual

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Fault-diagnosis DAC Professional
Fault 37: Sterilization PO
FAULT 37: Sterilization PO
Triggered by:
The measured pressure gives a calculated value for the temperature required for saturated steam that lies above
the maximum temperature (T1-T5) + D5 for the sterilization / disinfection during the period T1-T5
Causes / Remedy
Operating fault / Checks by personnel:
Appliance faults / Repair by technical service personnel
►
Control of Steam Generator Output ACOUT1 faulty
Check the control on the basis of the program print-out records/ Check voltage at output ACOUT1:
Print-out pressure readings too high in comparison with pressures P 6 – P10
Print-out reading for temperature sensor "Temp_Kess_Prog“ (AIN1) and for temperature sensor
"Temp_Chambr_Dis1/2“ (AIN2) correspond to one another, but
both are too high for the generation of
saturated steam
Voltage at ACOUT1 does not switch off during the regulation:
•
Check thermal transition semiconductor relay ACOUT1 to the cooling body
•
Exchange CPU-board
►
Pressure sensor signal fluctuates
Check using the record print-out:
Pressure values show fluctuations, peaks above the relevant pressures P 6 – P10
Recorded temperatures from temperature sensor "Temp_chambr_elec" (AIN1) and from temperature
sensor "Temp_Chambr_Dis1/2“ (AIN2) correspond to one another
•
Exchange pressure sensor
•
If there are further malfunction reports exchange CPU-board
►
"Poor regulatory behaviour of steam generator"
Poor heat transition from the heating coil of the steam generator, particularly in the transition from the heating
up phase to the sterilization phase it is possible that the temperature will exceed the theoretical sterilization
temperature for short periods
Lower P6-P10 and increase D5
Exchange steam generator
09/21/2006 49/61 Servicemanual DAC Professional