Service and Maintenance
182
RT-SVX24J-EN
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 60, p. 183
have been set before
replacing the drive.
Note:
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 VFD become necessary, the
replacement is not configured with all ofTrane'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. At the unit, turn the 115 volt control circuit switch to the
“Off” position.
2. Turn the 24 volt control circuit switch to the “Off'
position.
HIGH VOLTAGE IS PRESENT AT TERMINAL BLOCK OR
UNIT DISCONNECT SWITCH.
3. To modify 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 the [
▲
] and [
▼
] buttons to select the correct
parameter sub-group (first digit of second part of
parameter number)
e. Press [OK]
f. Use the [
▲
] and [
▼
] buttons to select the specific
parameter
g. Press [OK]
h. To move to a different digit within a parameter
setting, use the [
►◄
] buttons (Highlighted area
indicates digit selected for change)
i. Use the [
▲
] and [
▼
] buttons to adjust the digit
j. Press [Cancel] button to disregard change, or press
[OK] to accept change and enter the new setting
4. Repeat step (3) for each menu selection setting in
Table 60, p. 183
.
5. To reset all programming parameters back to the
factory defaults:
a. Go to parameter 14-22 Operation Mode
b. Press [OK]
c. Select “Initialization”
d. Press [OK]
e. Cut off the mains supply and wait until the display
turns off.
f. Reconnect the mains supply - the frequency
converter is now reset.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors 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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors 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.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
