Sirona DAC PROFESSIONAL, Service Manual

Page: 19 / 66

Fault diagnosis DAC Professional
Fault 1: Vacuum system
Faults in the autoclave / Correction of faults by technical service personnel
Yes
Yes
Yes
Note:
No
Start the vacuum test
Important: All vacuum tests must be conducted with a cold, dry autoclave. Watch the
evacuation pressure achieved here and the pressure change over time (from the display).
Is the vacuum pump
running?
No
Æ
Fault Class: Control fault / faulty pump please check the following for faults: power
output ACOUT3; fuse F1; possibly defective vacuum pump. Correct the fault, and then go
to next.
Æ
Fault Class: Vacuum fault
Pump system too weak
Correct fault and go on with
normal program start.
Vacuum test OK
Leak rate OK
Pressure is stable
Leak rate is too great
(> 1.3 mbar) and permanent
pressure rise
"Fault 1: Vacuum
system"
The sub-atmospheric
pressure achieved is very
weak, or the pressure is
the same as in the room.
"Fault 31: System leaks"
Pressure rise over P3
(very large leaks)
Sub-atmospheric
pressure is within the
range of moderate to
just less than the
evacuation pressure
(P17)
In the Service Program, raise the evacuation pressure (P17) for the vacuum test by approx. 20 mbar more than
the evacuation pressure reached during the first test. Then repeat the test.
(Important: When changing
P17, make sure that P13 is always greater than P17. If necessary, also raise 13 to ensure that P13 >
P17. If this is not done, you will receive the error message “System leak”.)
Special vacuum test OK?
(System flag F11 = 1)
(Pressure stable?)
Vacuum test OK?
(Leak rate < 1.3 mbar/min)
No
Fault 1
Vacuum system
Æ
Fault Class: Leak fault
Repair the leak in the intake
line; then next
Æ
Fault Class: Leak fault
Stop the leaks and then next
09/21/2006 17/61 Servicemanual DAC Professional