Fault diagnosis DAC Professional
Fault 2: Steam generator
FAULT 2: Steam generator
Triggered by:
The following monitoring time limits have been exceeded
•
Uet2 for the warming-up phases in the fractionations until reaching P5 (warm start), P39 (cold start),
P43 (cold start disinfection) or
•
Uet3 for the heating up to the sterilization / disinfection temperature T1-T5
Causes / Remedy
Operating fault / Checks by personnel:
•
Maximum load exceeded
•
Mains power voltage too low (check mains installation)
Appliance fault / Repair by technical service personnel
►
Control steam generator Output ACOUT1 faulty
Check in "Diagnosis Program":
Switch on ACOUT1, (the LED for this output lights up),
Measure voltage at output ACOUT1
►
Capillary control "2
nd
Overheating protection for the
Steam Generator" is faulty
•
Control unit is permanently open
Check for passage when cold
•
Control unit switches too soon
During a program, measure the voltage behind the control unit
with a sufficient water level in the steam generator (check level in the
condensate return) the control unit must not switch
►
"3
rd
Overheating protection for the Steam Generator"
fuse blown on the heating coil of the steam generator
(contact broken )
Measure voltage behind fuse, this will usually be due to a fault at the
output ACOUT1 of the control unit and additionally failure of the 2
nd
overheating protection
►
Heating Steam Generator faulty
In the Diagnosis Program switch on output ACOUT1, measure voltage
directly at the connectors of the heating coil of the steam generator
(voltage measured but coil remains cold)
►
Capillary level control unit faulty
•
Control unit does not open on overheating (water shortage).
Water shortage is not recognised and the overheating protection
switch switches off.
Functional test of the capillary level control unit:
In the "Service Program“/ "switch-times" set z24 = 0,
Start Universal Program with full load, by switching capillary control unit
and the resultant feed of distilled/demineralised feed water should
compensate for the water shortage in the steam generator
(observe condensation return to steam generator)
►
Pressure sensor-Signal/ Signal processing faulty
•
Pressure sensor signal or the signal processing too low
Steam generator heats until security-valve opens)
09/21/2006
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Servicemanual DAC Professional
Summary of Contents for DAC PROFESSIONAL
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Page 7: ...Figure 4 Back view 09 21 2006 5 61 Servicemanual DAC Professional...
Page 56: ...Sirona DAC Professional Process 09 21 2006 54 61 Servicemanual DAC Professional...
Page 60: ...Valve diagram 09 21 2006 58 61 Servicemanual DAC Professional...
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