146 RT-SVX34C-EN
Diagnostics
TR-1 and TR-200 VFD Programming Parameters
Units shipped with an optional variable frequency drive (VFD) are preset and run tested at the
factory. If a problem with a VFD occurs, ensure that the programmed parameters listed in Table 79
Table 80, p. 145 have been set before replacing the drive.
Note: Model TR-1—Check to make sure that parameter 104 is set to 60 Hz. To check parameter 104
press the Extended Menu button, press the Left Arrow button until menu Load & Motor is
shown, press the up arrow until parameter 104 is displayed. Parameter 104 can then be
modified by pressing the Change Data button and then the Up Arrow button. When the
desired selection has been made press the OK button.
Note: Model TR-200—Check to make sure that parameter 1-23 is set to 60 Hz. To check parameter
1-23 press the [Main Menu] button (press [Back] button if the main menu does not display),
use the [
▼] button to scroll down to Load & Motor, press OK, use the [▼] button to select
1-2, press OK, and finally use the [▼] button until parameter 1-23 is displayed. Parameter
1-23 can then be modified by pressing OK button and using [
▲] and [▼] buttons. When
the desired selection has been made, press the OK button.
Should replacing the a VFD become necessary, the replacement is not configured with all of Trane's
operating parameters. The VFD must be programmed before attempting to operate the unit.
To verify and/or program a VFD, use the following steps:
1. Remove the mode input (RTRM J6-2 and J6-4) or turn the NSB panel to OFF so that the fan will
not attempt to start during programming.
WARNING
Hazardous Voltage! w/Capacitors!
Disconnect all electric power, including remote disconnects before servicing. Follow proper
lockout/tagout procedures to ensure the power cannot be inadvertently energized. For variable
frequency drives or other energy storing components provided by Trane or others, refer to the
appropriate manufacturer’s literature for allowable waiting periods for discharge of capacitors.
Verify with an appropriate voltmeter that all capacitors have discharged. Failure to disconnect
power and discharge capacitors before servicing could result in death or serious injury.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK 1TB1 OR UNIT DISCONNECT SWITCH 1S14.
2. To modify TR-1 parameters:
a. Press the Extended Menu button
b. Press the Left or Right Arrow button to scroll through menus
c. Press the up or down arrow to scroll through parameter settings within a specified menu
d. Press the Change Data button to allow a parameter value to be changed
e. Press the Up or Down arrow button to change the parameter
f. Press OK button when desired change has been made.
3. To modify TR-200 parameters:
a. Press Main Menu button (press [Back] button if the main menu does not display)
b. Use the [
▲] and [▼] buttons to find the parameter menu group (first part of parameter
number)
c. Press [OK]
d. Use [
▲] and [▼] buttons to select the correct parameter sub-group (first digit of second
part of parameter number)
e. Press [OK]
f. Use [
▲] and [▼] buttons to select the specific parameter
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