Sirona DAC PROFESSIONAL, Руководство по обслуживанию

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Fault-diagnosis DAC Professional
Fault 35: Sterilization TO
FAULT 35: Sterilization TO
Triggered by:
The maximum temperature (T1-T5)+D5 for the sterilization / disinfection during the period T1-T5 (measured by the
temperature sensor "Temp_chambr_elec“ at AIN1) has been exceeded
Cause / Remedy
Operating fault / Checks by personnel:
Appliance fault / Repair by technical service
►
Temperature sensor "Temp_Kess_Prog"/ Analog input AIN1 measures too high
Check using the record print-out:
Print-out reading for control pressure corresponds to control pressures P 6 – P10
Print-out reading for temperature sensor "Temp_Chambr_Dis1/2“ at analog input corresponds with the
pressure required for saturated steam.
In order to determine whether the fault lies in the temperature sensor or the signal processing on the CPU-
board, proceed as follows:
Switch temperature sensors AIN1 and AIN2 and start the program again,
►
Pressure sensor / Analog input AIN 3 measures too low
Check using the program print-out records:
Pressure reading on print-out corresponds to the control pressures P 6 – P10
Print-out readings from temperature sensor "Temp_chambr_elec“ (AIN1) and from temperature sensor
"Temp_Chambr_Dis1/2“ (AIN2) correspond to one another, but both are too high to produce saturated
stream
•
Exchange pressure sensor
•
If there is still a fault, exchange the CPU-board
►
Control for steam generator output ACOUT1 faulty
Check using the program print-out records / test voltage at output ACOUT1:
In comparison with the control pressures P 6 – P10 pressure reading on print-out are too high
Pressure reading on print-out corresponds to the control pressures P 6 – P10
Print-out readings from temperature sensor "Temp_chambr_elec“ (AIN1) and from temperature sensor
"Temp_Chambr_Dis1/2“ (AIN2) correspond to one another, but both are too high to produce saturated
stream
Voltage at ACOUT1 does not switch off during the control process:
•
Check heat transition semi-conductor relay ACOUT1 to cooling body
•
Exchange the CPU board
•
Program runs without
disturbance, (or with "Fault 27“ )
•
Temperature on print-out too high
to produce saturated steam?
Exchange temperature sensor now
on AIN2 (previously on AIN 1)
•
Fault 35 again
Does temperature reading on print-
out correspond with the pressure to
produce saturated steam?
Signal processing on CPU-
board faulty,
Exchange CPU-board
09/21/2006 46/61 Servicemanual DAC Professional