ECM Overview and Setup
UNT-SVX041D-EN
33
VelociTach Motor Control Board
The VelociTach
TM
motor control board controls and
reports the performance of up to two Trane brushless DC
(BLDC) motors.
The motor control board also:
•
Coordinates the operation of the fan in response to
electric heat behavior and electric behavior in
response to hydronic heat behavior.
•
Incorporates a user interface that allows adjustment of
certain unit parameters and provides constant
feedback on motor operation.
•
Integrates service and troubleshooting tools.
•
Integrates a versatile configurable auxiliary
temperature sensor.
•
Incorporates various safety and lockout features, such
as maintaining proper fan speeds if electric heat is
called for.
Status Display
The motor control board contains a four-digit, seven-
segment display that is used to present information in a
format close to real-world language, while having a small-
form factor. Most characters are immediately
recognizable; however, refer to the tables below for the
graphical representation of each alphanumeric character.
Figure 19.
VelociTach motor control board
Figure 20.
Status display
Table 20. Screen representation of alphabetical characters
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Table 21. Screen representation of numeric characters
1
2
3
4
5
6
7
8
9
0
