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13 RLDS
Maintenance
13.1. Warnings and
Cautions
WARNING: Shock hazard! Always disconnect
the power supply before opening the enclosure
of the monitor.
CAUTION: When working inside the
instrument be very careful not to dislodge any
electrical wiring or pneumatic tubing. The
RLDS contains sensitive electronic
components that can be easily damaged. Be careful not
to touch or disturb any of these components.
13.2. Charcoal Filter
The charcoal filter removes refrigerant gas from the
purge-air stream during the purging process.
Replace the charcoal filter (P/N 275-0275)
approximately every six (6) months, when a zero
filter fault occurs (fault code <0100>), or after the
monitor has been exposed to unusually high levels of
refrigerant gas, such as after an evacuation alarm.
13.3. Hydrophobic Filter
The hydrophobic filter prevents water from
entering the detector. A zone flow fault will occur
(fault code <0800>) if this filter becomes blocked.
Replace the hydrophobic filter as required
(P/N 572-0980).
Warnings and Cautions
13.4. Servicing Air Lines and
The gas sample line and optional exhaust line should
be checked periodically for obvious signs of kinks,
damage and contamination. The gas-sample line and
purge-line termination filters prevent dust and dirt
from entering the monitor. Both of the filters should
be checked periodically.
• A zone flow fault will occur (fault code
<0800>) if the gas-sample line filter becomes
blocked.
• A purge flow auto will occur (fault code
<1000>) if the purge-line filter becomes
blocked.
Remove the filter from the line and replace it with
a new one (P/N 275-0300).
13.5. Annual Maintenance
To assure peak performance and accuracy of the
RLDS, it is recommended that maintenance be
performed on an annual basis. This maintenance
routine involves replacing all end-of-line filters,
charcoal filter, and internal dust filter/water stop.
These filters prevent dust and dirt from damaging
components of the RLDS such as the solenoid
manifolds, infrared sensor, and sample pump. If the
RLDS is installed in areas where dust and particulate
levels are high, it is recommended that the filters be
changed approximately every after three to six
months to prevent system faults caused by purge or
zone restrictions.
13.5.1. Checking Pump and Bench
During maintenance is a good time to check the
diagnostic screen ("DIAG") to verify that the detector
voltage and pump pressures are within optimum
parameters. If they are not, a voltage adjustment or
scheduled pump replacement could head off a system
fault.
To check the pump and detector diagnostics, enter the
diagnostic screen by using the front panel keypad and
pressing the arrow key to highlight DIAG.
Replacing Termination
Filters
Diagnostics
RLDS Maintenance • 63
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