Tuttnauer 2301006, Operation & Maintenance Manual, Page: 87 / 122

Page 82 of 117 pages
Symptoms
Possible causes check-ups and
tests
Corrections
4.The conditioning
phase (prevacuum
does not work). 4.1 Check if the trouble is due
to pump or its electrical
supply circuit. 4.1 See solutions indicated in
par. 2.
4.2 The vacuum valve passing
water through the vacuum
pump stuck or damaged. 4.2 Check, repair or replace
the water to pump valve.
4.3 The exhaust to pump valve
stuck or damaged. 4.3 Check repair or replace
the fast exhaust valve.
4.4 Door improperly closed,
gasket damaged or
incorrectly seated on the
groove. 4.4 Close the door, fix or
replace the gasket.
4.5 Leakage at the vacuum or
exhaust piping. 4.5 Check and tighten fitting
joints, replace defective
packing.
4.6 Steam inlet valve blocked
or damaged. 4.6 Fix or replace the steam
valve.
No steam inlet or low
steam pressure. 4.7 Low pressure at the steam
supply line. 4.7 Check the steam
generator as shown in
par. 2.
4.8 Control system trouble. 4.8 Replace the control
boards.
5. Prevacuum phase
completed but
temperature and
pressure are low and
the sterilization point is
not reached or takes a
long time to reach it. 5.1
5.2
Low pressure at the steam
supply line.
Steam inlet valve clogged
or damaged. 5.1
5.2
Check steam generator,
fix pressure.
Check and fix or replace
the steam valve.
5.3 Electronic pressure
transducers or measuring
circuits faulty or set too
low. 5.3 Set correctly or replace
boards.
5.4 Control system trouble. 5.4 Replace the control
boards.