Envent Engineering Ltd. Page 40 Revision 2.4
Electronics Issues (Cont’d)
IS Barrier failure (For 330S
analyzer series only)
IS Barrier may need replacement. Consult
Envent Engineering Ltd.
Contaminants in sample
chamber
Clean sample chamber. Replace aperture
and window if required. Contact Envent
Engineering Ltd for replacement and
assistance.
Fault LED (Low
H2S sensing
Tape)
New H2S sensing tape is
required
H2S Sensing tape requires change
(Average of 2 to 3 days left, from the
moment alarm goes off, for the tape to be
completely used up). Refer to "H
2
S Sensing
Tape Change Procedure" on page 31 or on
sticker in the analyzers door.
Low H2S sensing tape sensor
failure
If the alarm does not clear once a new H2S
sensing tape is installed, the low H2S
sensing tape sensor or its wires have failed
and need to be replaced. Consult Envent
Engineering Ltd to order a replacement.
Low H2S sensing Tape Sensor Part #:
330046A
Fault LED (Low
Pressure)
Pressure of sample gas is
lower than setpoint of pressure
switch (factory set to 10 psi
descending)
Inspect the sample inlet upstream to
troubleshoot the problem.
Pressure switch failed If pressure is above 10 psi and alarm
continuous, the pressure switch setpoint
might have changed. Set back to 10 psi
descending. Also, check pressure switch
wiring
If the problem persists, pressure switch
might need replacement. Contact Envent
Engineering Ltd.
Pressure regulator failed The problem might be coming from the
pressure regulator. Troubleshoot and
consult Envent Engineering Ltd.
Fault LED
(Oven Fail)
Fuse not installed. Fuse for furnace does not come installed in
the controller board. Please check spare
fuse bag and install fuse.
Oven not working properly Oven failed and temperature has dropped
below the optimal temperature. Please
consult Envent Engineering Ltd.
Blank Display Contrast needs adjustment Change contrast by turning the
potentiometer in the display board.
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