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8.7.2. Navigating to the Fault Screen
Displayed on the initial Status screen (Figure 7-2) is
a Fault option. Scroll down with the cursor key and
select this option, and the Fault screen will display:
Figure 8-6 - Fault Screen
8.7.2.1. Critical Faults
• NO FLOW ON ZONE - Go to the Status
screen (Figure 7-2) and select FAULT. This
will display a NO FLOW message in each
individual zone affected. Check for a blockage
in the air sample line or at the line-end filter.
Once the blockage has been cleared, the RLDS
will return to normal operation after the zone
has been sampled.
NOTE: This can take several minutes
since it is dependent upon how many zones
there are and their lengths. The RLDS will
clear the fault the next time it polls the affected
zone.
• NO FLOW ON PURGE - Check the purge
line for a blockage. Verify that the length of the
purge line and exhaust line do not exceed 500
feet (152 meters) in length.
• NO FLOW DETECTED - Check for proper
pump operation. Examine the hydrophobic
filter for contaminants or water on the input
side. If the input side is gray, a contaminant is
present and the filter must be replaced. To
drain, remove the tubing from both sides of the
filter and tap the tubing on a hard surface to
dislodge the contents.
• CLIPPING FAULT - The detector voltage
36 • RLDS I&O Manual
may be out of tolerance. Refer to the Diagnostic
screen (Figure 8-12) for the DET voltage, AVE
voltage and ZERO voltage. Contact Technical
Support with this information for further
instructions.
• REZERO VOLT TOL - The detector output
voltage is out of tolerance. Refer to the
Diagnostic screen (Figure 8-12) and contact
Technical Support for assistance.
• TRIGGER FAULT - No trigger from IR
source pulser. Contact Technical Support with
all information from the Diagnostic screen
(Figure 8-12) for further instructions.
8.7.2.2. Non-Critical Faults
• BOX TEMP FAULT - Enclosure's internal
temperature is outside normal range (or IR
sensor has failed). Check the installation to
verify that the monitor is not being subjected to
extreme temperatures. Verify that the
ventilation holes are not obstructed. Check the
Diagnostic screen (Figure 8-12) for the ZERO
temperature, BNCH temperature and BOX
temperature. Contact Technical Support with
this information for further instructions.
• BENCH TEMP FAULT - Optical bench is
outside of normal operating range (or sensor
has failed). Check the installation to verify that
the monitor is not being subjected to extreme
temperatures. Check the Diagnostic screen
(Figure 8-12) for the ZERO temperature,
BNCH temperature and BOX temperature.
Contact Technical Support with this
information for further instructions.
• PRESSURE SENSOR - Manifold pressure is
outside normal operating range (or sensor has
failed). Check the Diagnostic screen record
ALL data (Figure 8-12). Contact Technical
Support with this information for further
instructions.
• LOOP FAULT - This would only be displayed
if the dual 4-20 mAdc option was installed and
one or both current loops are open. Check the
wiring to load/monitoring circuit on both 4-20
mA loops.
• CONFIG FAULT - There is an error in the
RLDS Setup screen 2 - NUMBER ZONES
INSTALLED field (Figure 7-4). Check that
the number of zones installed for each RLDS
unit and the number of RLDS units on the
026-1309 Rev 8
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