J22 TDLAS Gas Analyzer 4900002277
SpectraSensors, Inc. 109
9 Diagnostics and Troubleshooting
General
Troubleshooting
For local display
Error Possible Causes Solution
Local display dark and no
output signals
Supply voltage does not
match the value indicated
on the nameplate.
Apply the correct supply
voltage → 15.
The polarity of the supply
voltage is wrong.
Correct the polarity.
No contact between con-
necting cables and termi-
nals.
Check the cable connec-
tion and correct if neces-
sary.
Terminals are not plugged
into the I/O electronics
module correctly. Termi-
nals are not plugged into
the main electronics mod-
ule correctly.
Check terminals.
I/O electronics module is
defective. Main electron-
ics module is defective.
Order spare part →
137.
Local display is dark, but
signal output is within the
valid range
Display is set too bright or
too dark.
• Set the display
brighter by simulta-
neously pressing +
.
• Set the display darker
by simultaneously
pressing + .
The display module cable
is not plugged in correctly.
Insert the plug correctly
into the main electronics
module and display mod-
ule.
Display module is defec-
tive.
Order spare part →
137.
Backlighting of local dis-
play is red
Diagnostic event with
"Alarm" diagnostic behav-
ior has occurred.
Take remedial measures.
Message on local display:
"Communication Error"
"Check Electronics"
Communication between
the display module and
the electronics is inter-
rupted.
• Check the cable and
the connector
between the main
electronics module
and display module.
• Order replacement
part → 137.
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