43
Normally the operator is informed at the start of the next process if an
output is set to manual mode. Despite this, the status must always be
reset to auto mode immediately on completion of work.
External safety interlock fault
The sterilizer is equipped with an automatic monitoring system for
those external components that serve as safety interlocks independently
of the control system.
If the external components changed their position, or got stuck and are
constantly indicating “safe position”, this would not normally have
been noticed in service. It would only have been discovered when it was
too late and the control system ha also failed, ie when the external
components were needed for safety purposes.
The purpose of the monitoring system is to ensure the operation of both
the safety systems that allow media, among other things, to be admitted
to the chamber or the door to be opened.
Monitoring is done by a system of relays which is in contact with the
external components and the control system. At certain predetermined
places before and during the process, the control system checks by
means of the relay monitoring that the respective external component
has opened or closed its contacts as expected.
If the relay information does not agree with the control system’s own
information, the control system stores the discrepancy until the process
has ended.
After the process, an alarm is activated and a message indicated what
type of interlocking is present (see also “Fault codes” in the operation
chapter of the OPERATION manual).
The alarm cannot be reset in the normal way, and as long as the alarm
is activated, a new process cannot be started.
INTERLOCK FAULTS
1. Shut off the audible signal by pressing the button or the
[ALARM OK] button.
2. Rectify the faulty component.
3. Activate the stepping key and reset the alarm with the button
or the [ALARM OK] button.
4. Set up the component and do a safety check. The procedure is
described in the DOOR chapter.
When using this method, the blocks that prevent
hazardous situations from arising are removed. The
technician himself has to decide which operations are
permitted.
To Next Page
Loading...
Need help?
General
