RLE LD5200 V.2.3 - Manual (Page 113)

rletech.com LD5200 User Guide 113
D Troubleshooting
How do I clean the
cable?
Use a mild detergent solution - 1 cap full of Dawn liquid
dishwashing detergent to 2 gallons of lukewarm water (<105
degrees F) - to clean water and chemical sensing cable. Put the
cable into a bucket filled with the solution, agitate the cable, rinse,
and gently wipe dry. Test the cable prior to reinstallation to be sure
it has been thoroughly cleaned of contaminants.
If only a small section of the cable needs to be cleaned, wipe the
contaminated area of the cable with isopropyl alcohol.
My system shows an
alarm condition, but a
leak is not found at
location shown on
display. The system
will not clear. It is in
alarm all the time!
The most common causes for this condition includes:
1 Water is touching the cable in two places at the same time. The
distance reading is an average of the two values. For example, if
leaks are detected at 200 feet and at 100 feet, the system would
register a leak at 150 feet ( (200 + 100)/2 = 150 ). This is a
common problem when, after an alarm sounds, the operator
resets the system without recording the first value displayed. It
is very rare that water will touch two places on the same cable at
the exact same time. This situation is true for all systems which
measure distance. Check the Alarm History log for the first
incidence of the leak.
2 The cable has been exposed to high humidity, or the dew point
has been reached. This is especially common when two or more
air conditioners share the same under-floor space. Problems of
this nature can be resolved as follows:
a Fix the air conditioners. This is sometimes easier said than
done as most people believe if the unit is on and cooling, it is
working properly. Extensive investigation may have to be
done just to prove the air conditioner is faulty.
b Turn the sensitivity adjustment on the controller to its least
sensitive setting - refer to Chapter 3, “LCD Touch Screen
Interface” on page 29. This should keep the system from
alarming, but will not resolve the air conditioner problem.
c Move the cable at least 10' away from the front of the air
conditioner
d Cover the sensing cable in front of the air conditioner with
spiral wrap (plastic covering which allows water in but keeps
dew point from condensing water on the cable).
3 A cable has been contaminated either chemically (floor sealing
chemicals dissolve and damage cable), or physically (small
metallic chips from filings or solder around pipes or wires from
electrical installation). This requires replacement of the cable.
4 The cable has become damaged - most often from a floor tile
being dropped on it. Damaged cable must be repaired or
replaced.
Question Answer
Table D.2 Troubleshoot Sensing Cable (continued)