SES 2000 AUTOCLAVE Part 3
ST-SM8l Page 15 of 43
PART 3 MAINTENANCE
FUSES (Fig. 4 and 8 )
3.1 The autoclave is protected by four fuses. Three mains supply fuses are fitted on the autoclave back panel
(Fig. 4). The fourth fuse (process and control circuits) is fitted on the controller board inside the autoclave (Fig. 8).
Printer versions have an extra fuse on the printer PCB. All fuse ratings are given in Technical Data, pages 4 and
5.
FAULT DIAGNOSIS
3.2 The following table sets out a number of typical ‘faults’ which could occur, and indicates likely causes and
how to rectify them. For maintenance procedures refer to Parts Replacement And Adjustment. Cross references
in the ‘Remedy’ column refer to paragraphs under Part Replacement and Adjustment.
WARNINGS
Switch-off and disconnect mains power supply before removing the autoclave cover, or doing
maintenance procedures. During certain procedures mains voltage may have to be present with
the cover removed and extreme care should be taken to avoid contact with mains voltage.
Check that chamber is at atmospheric pressure before opening the door.
Should the door be opened beware of possible very hot water or steam escaping
from the chamber.
Fault Diagnosis Table
Fault Possible Cause Remedy
(1) Nothing happens when power (a) Mains supply failure. (a) Check mains supply, also
switched on (No display). plug and supply cable
for loose connections
or breaks.
(b) Main fuses blown (rear panel). (b) Replace fuse(s)*.
(c) Faulty power switch. (c) Replace power switch.
(d) Thermal fuse blown (d) Replace thermal fuse.
(e) Transformer failed. (e) Check transformer secondary
voltage (20V a.c. rms).
Replace transformer if
output is zero (section 3.6).
(f) Short circuit on (f) Check sensor, fill valve, vent
24V circuit. valve etc. for short circuit
Replace where necessary.
*Note: Blown fuses can indicate further problems. Always investigate the reason for any fuse blowing, but bear
in mind that fuses can ‘age’ and blow for no other reason.
(2) Door cannot be opened. (a) Pressure door lock jammed. (a) Replace pressure door lock
(section 3.8). To open
chamber door, disconnect
body from unit (section 3.10)
and pull it backwards so that
the locking bolt clears the
door.
Continued
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