Steris SYSTEM 1E, Maintenance Manual

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3-7
764333-675
energized closing V6. P2 is de-energized and units
drains. After 40 seconds control proceeds to
Event 19 .
Event 19 – Rinse Fill: P1 de-energizes and SOL3
de-energizes, opening V6. SOL4 energizes, closing
V5 and SOL7 water fill valve energizes, filling
chamber with water for rinse. After five seconds,
control proceeds to
Event 20 .
Event 20 – Rinse Fill Continue: SOL3 energizes,
closing V6. Chamber continues filling. Control
proceeds to
Event 21 when LS3 opens, sensing a full
chamber condition.
Event 21 – P1 Circulation Pump Prime: SOL3
de-energizes, opening V6, and SOL7 de-energizes. If
fill time exceeds five minutes, an abort is called
(Alarm: "
FILL PROBLEM" ). Control proceeds to
Event 22 .
Event 22 – Rinse: SOL4 de-energizes, opening V5 after
one second. SOL4 energizes, closing V5, and P1 and
P2 energize. Control proceeds to
Event 23 after
10 seconds.
Event 23 – Rinse Drain: SOL3 energizes, closing V6,
SOL4 de-energizes, opening V5, P1 remains
energized and P2 de-energizes. Unit drains for a fixed
40 seconds.
The control performs a total of two rinses, repeating
Events 19 to 23 for a total of two times. During the
final drain, after the second rinse, the control checks
the LS6 for an open condition. If not sensed open, an
alarm occurs and the cycle aborts. (Alarm:
"HP
PUMP FAILURE: PUMP OFF". ) At successful
completion of the test, the control continues with
Event 24 .
Event 24 – Air Purge: P1 is de-energized, P2 remains
energized, SOL4 is energized closing V5. After
60 seconds P2, SOL3 and SOL4 are de-energized,
cycle continues to
Event 25 .
Event 25 – Test # 12: MaxPure™ Filter test. The control
energizes SOL8 and controls COMP1 by PT1. If 55 psi
is not reached within a three-minute time period, the
first part of this test fails, an alarm occurs (Alarm:
"MAXPURE FILTER MEMBRANE TEST
FAILED"
), and the cycle aborts.
If pressure is achieved within three minutes, the test
enters a three-minute stabilization phase where
COMP1 is energized and de-energized to maintain
55 psi for three minutes. After three minutes, the
control measures PT1. If <52.83 psi, the test fails, an
alarm occurs (Alarm:
"MAXPURE FILTER
MEMBRANE TEST FAILED" ), and the cycle aborts.
If the pressure is >52.83 psi, then COMP1 is
de-energized while SOL3 and SOL4 are energized. The
control waits 15 seconds and reads PT1. If pressure is
<51.73 or >58.75 an alarm occurs (Alarm: "MAXPURE
FILTER MEMBRANE TEST FAILED" ). PT1 is
monitored for two minutes, during which time if the
pressure drop exceeds 4.4 psig, the test fails, an alarm
occurs (Alarm:
"MAXPURE FILTER MEMBRANE
TEST FAILED" ), and the cycle aborts. In the event of
a failure, the printout indicates three values: the
pressure level achieved, the pressure when the test
failed, and the time (in seconds) to failure. Otherwise,
cycle continues to
Event 26 .
Event 26 – Cycle Complete: SOL8, SOL3, and SOL4
de-energize. After 10 seconds PT1 is checked. If PT1 is
<3.51 psi or >11.7 psi, an abort is called (Alarm:
"DRAIN CHECK FAULT" ). Exposure time is also
checked: If <six minutes, an abort is called (Alarm:
"EXPOSURE TIME FAILURE" ). Printer prints cycle
summary, audible end-of-cycle tone sounds, and
complete is indicated. Control proceeds to
Event 27
after operator presses CANCEL button.
Event 27 – Seal Deflate: COMP1 de-energizes and
SOL2 energizes. Seal deflates and chamber open time
is printed on cycle tape. Control proceeds to
Event 28
when printer stops printing.
Event 28 – Return to Ready: SOL2 de-energizes after
15 seconds and enters a READY state.
Other alarm monitoring conditions:
1. Power Failure – anytime during a cycle where loss
of power is sensed, an alarm occurs and the cycle
aborts. (Alarm:
“POWER FAILURE". )
2. Temperature Problem – anytime a temperature
sensor on the control board senses an out-of-range
condition, an alarm occurs and the cycle aborts.
(Alarm:
“TEMP. PROBLEM". )
3.5 PRINCIPLES OF
OPERATION – DIAGNOSTIC CYCLE
DESCRIPTION
The Diagnostic Cycle is a test cycle used to check the
operation performance of the SYSTEM 1E Liquid
Chemical Sterilant Processing System. Refer to the
Diagnostic Cycle Graph when reviewing the following
description. Note that the Events listed coincide with
event number on the cycle graph.
Event 1 – DIAGNOSTIC button is pressed. If LS4 is
closed, cycle continues to Event 2 ; if door switch is
not closed, cycle will not start.
The control verifies the MaxPure Filter life and will
not start the cycle if the filters has been in use for more
than 90 days.
If UV intensity is <6.0 mA, display reads "WAIT FOR
UV LAMP". If at any time during test intensity drops