Sirona DAC PROFESSIONAL, Руководство по обслуживанию

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Fault Diagnosis DAC Professional
Fault 10: Overheating Steam generator
*1) Until exchange of pump, increase switching times z24, z25 by 3 (s)
*2) Until exchange of steam generator, increase switching times z24, z25 by 3 (s), connect contacts to capillary
tube controller "Overheating protection"
Fault during the
program
Feed pump stays on -
pumping noise
no
yes
Water level in steam
generator rises
(check condensation
return flow pipe)
yes
no
•
Control for feed pump/ feed
pump solenoid valve on
CPU-board output ACOUT 5 /
Fuse F3 defective
⇒
F3/ exchange CPU-board
•
Feed pump faulty/
•
Feed pump solenoid valve
faulty (does not open)
⇒
Exchange feed pump or
solenoid valve for feed pump
•
Pressure release solenoid
valve leaking (observe pipe
from valve)
•
Vacuum solenoid valve
leaking
⇒
Clean/exchange solenoid
valve
•
Feed pump not providing
sufficient power
⇒
exchange Feed pump*
1)
•
(Float switch for feed water
(Digital input DIN 4) faulty
(does not close, water
shortage is not recognised))
•
Poor heat transfer from heating coil
•
Capillary tube level control for the
steam generator closes too soon
⇒
Replace steam generator
*2)
09/21/2006 26/61 Servicemanual DAC Professional