Trane HUV Installation, Operation And Maintenance Manual page 108

Replacing ECM Components
Figure 66.
Notice one ECM type is configured at address 99, but no
ECM is found at that address. Also, notice that another
ECM has been found with an address of 0. When this
situation occurs, Tracer TU displays a Softset... button you
can use to configure the engine module address.
Complete the following steps to softset the engine module
address:
1. Click the Softset... button to initiate the softest
procedure.
Tracer TU displays the Softset Rotary Address -
Expansion Module dialog box.
Figure 67.
2. Prior to clicking OK, activate the engine module using
the (+) button on the ECM engine board in the control
box.
Once the engine module is activated, the LED to the
right of the (+) button lights up.
Figure 68.
108
3. Once the light has been activated, click OK on the
Softset Rotary Address - Expansion Module dialog box
shown in Step 2.
When you click OK, Tracer TU softsets the engine
module IMC address to 99 and the light on the module
will turn off.
4. Return to the Expansion Module Status box, click
Discover and wait five to ten seconds for Tracer TU to
refresh the screen.
Once complete, the value in the Error column updates
to None and the Status column updates to Comm Up.
Figure 69.
UV-SVN02C-EN