ML442 | v5k
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Expo Technologies UK
T: +44 (0) 20 8398 8011
E: [email protected]
Expo Technologies US
T: +1 (440) 247 5314
E:[email protected]
Expo Technologies China
T: +86 532 8906 9858
E: [email protected]
For PO option only
Is there pressure at the
power switch output
bulkhead and at the
power switch? Is the
power switch OK?
Is the Purge
time correct?
System fails to switch power
on after the purge time has
elapsed.
Call Expo
Has the purge
time completed
its course?
Is Power
available?
No
Yes
Check the small
indicator button
on the timer
valve. When the
valve has timed
out, it should
return out when
depressed.
No
Yes
Yes
Check if the
external Power
Switch contacts
close at 1.4 Barg
No
Note the timer setting. Reset the timer to the
minimum available purging period and check
the operation on that purge time.
Ensure that the purge time is returned to
its original setting and checked before
putting the system back into service.
No
For PO option only
Is the tube to the
power switch air
tight?
Ensure fitting nuts
are tightened and
that the tube is
not damaged.
Check and repair
as necessary.
No
Yes
Yes
Is Power
isolator closed?
No
Yes
Yes
Are the fuses or
circuit breaker?
No
