RTHD and RTAC - Trane

Transducer Checkout Procedure
Is the transducer
bound and
communicating?
CAUTION
Equipment
Damage Possible!
Pressure Transducers
All of the Pressure Transducers used on RTAC and RTHD units are mounted on
service valves. Pressure Transducers measure absolute pressure. They have a
range of 0 to 475 psia with an accuracy of ± 1.5 psi under steady state conditions.
Figure 10.Pressure Transducer
Connect TechView and get into Binding View. This will shut the chiller down.
Once in Binding View verify that the Pressure Transducer is bound.
Note: Please refer to Service Tool for questions concerning binding LLIDs and
getting into Binding View.
If there are multiple LLIDs that are not verified go to IPC troubleshooting.
If the transducer is not bound, try to bind it. If the transducer will not bind, it
could be a problem with the connector or the sensor itself. Take a close look at
the connector to make sure that all four wires are securely in place. It may be
necessary to remove the cap to check for broken or misplaced wires.
All units built before October 1, 2002 (U02#####) used connectors that must be
replaced if the cap is removed. If the cap is removed on any of these units cut out
the old connector and splice in a new section of cable and a new connector. See
Section 2-IPC Overview for instruction on installing a new cap.
If the transducer is bound, try to turn the LED on with a magnet. If the light will
not turn on there could be a problem with the transducer. Try to turn the light on
in Binding View. With the light on hold the magnet to the LED. The LED should
get brighter. If it doesn’t get brighter, this may indicate a problem with the
transducer or the connector. Take a close look at the connector to make sure that
18 RLC-SVD05A-EN
LED