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Service and Maintenance
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 1S70
to the Off position.
2. Turn the 24 volt control circuit switch to the Off position.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious
injury.
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 a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
Important: HIGH VOLTAGE IS PRESENT AT TERMINAL
BLOCK 1TB1 OR UNIT DISCONNECT
SWITCH 1S14.
3. To modify parameters:
a. Press Main Menu twice (if TR150 drive) (press
Back if the main menu does not display)
b. Use the Up and Down buttons to find the parameter
menu group (first part of parameter number)
c. Press OK
d. Use the Up and Down buttons to select the correct
parameter sub-group (first digit of second part of
parameter number)
e. Press OK
f.
Use the Up and Down buttons to select the specific
parameter
g. Press OK
h. To move to a different digit within a parameter
setting, use the Left and Right buttons (Highlighted
area indicates digit selected for change)
i.
Use the Up and Down buttons to adjust the digit
j.
Press Cancel to disregard change, or press OK to
accept change and enter the new setting
4. Repeat
Step 3
for each menu selection setting in .
140
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.
g. Ensure parameter 14-22 Operation Mode has
reverted back to "Normal Operation".
Notes:
•
Item 5 resets the drive to the default
factory settings. The program
parameters listed in will need to be
verified or changed as described in Items
3 and 4.
•
Some of the parameters listed in the
table are motor specific. Due to various
motors and efficiencies available, use
only the values stamped on the specific
motor nameplate. Do not use the Unit
nameplate values.
•
A backup copy of the current setup may
be saved to the LCP before changing
parameters or resetting the drive using
parameter 0-50 LCP Copy (All to LCP to
save all parameters to keypad and All
from LCP to download all parameters
into drive/replacement drive).. See LCP
Copy in the VFD Operating Instructions
for details.
6. Follow the start-up procedures for supply fan in the
"Variable Air Volume System" section or the "Relief
Airflow Measurement" start-up procedures for the relief
fan.
7. After verifying that the VFD(s) are operating properly,
press the STOP key to stop the unit operation.
8. Follow the applicable steps in the "Final Unit Checkout"
section to return the unit to its normal operating mode.
If a problem with a VFD occurs, ensure that the
programmed parameters listed for supply and relief VFD
have been set before replacing the drive.
Note: Follow listed sequence when updating VFD
parameters.
RT-SVX072D-EN
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