Velocitach Motor Control Board - Trane UniTrane Fan Coil Installation, Operation And Maintenance Manual

ECM Overview and Setup

VelociTach Motor Control Board

WARNING
Safety Alert!
You MUST follow all recommendations below. Failure
to do so could result in death or serious injury.
All settings take effect immediately, including fan
startup and enabling of electric heat. Caution should be
taken to stay clear of hazardous voltages, moving parts
and electric heat elements while making adjustments
to the motor control board. If it is not practical to stay
clear of these areas during adjustment of the motor
control board, please contact Trane Global Parts for
configuration kit that allows easy powering of the
motor control board outside of the unit with a
9V battery.
CAUTION
Burn Hazard!
On electric heat units, certain parameter values are
locked out to prevent overheating of the unit. These
functions will appear to be saved; however, they will
not be accepted if the Electric Heat Protection setting is
"On" . Do not change the Electric Heat Protection setting
to "Off" and make changes to the protected settings
unless you are programming an unconfigured service
replacement board to match the unit settings on a ECM
configuration label. Failure to follow this instruction
could result in the unit overheating and becoming hot
to the touch, which could result in minor or moderate
injury, and/or equipment damage.
The motor control board functions and unit specific
settings are summarized on the motor control board
configuration label affixed to the back side of the control
panel low voltage lid on every unit.
To check status, configuration, or to change settings on the
motor control board with the power on the unit, detach the
low voltage access lid and look or reach through the low
voltage access panel. See
88
Figure 77.
Figure 77. VelociTach motor control board
The motor control board features a nested menu
integrated user interface (UI) that supports:
• Status display for instant touch-free confirmation of
unit operation.
• Configuration parameter and value display and
modification changes (using integrated menu/set
buttons).
• Error code prioritized reporting.
Note: Characters on the VelociTach motor control board
display appear in red, on a black background.
The display contains decimal positions as well that change
position with each parameter, as appropriate. Under
normal conditions (i.e., with no error code displayed), the
status will loop the following message:
UNT-SVX07E-EN