Catalogue

UNT-PRC001-EN 39
Controls
ECM Engine Controller
The Electronically Commutated Motor (ECM) engine controls and reports the performance of up
to two Trane Brushless DC (BLDC) motors.
• The engine also coordinates the operation of the fan in response to electric heat behavior and
electric behavior in response to hydronic heat behavior.
• The engine incorporates a user interface that allo
ws adjustment of certain unit parameters and
provides constant feedback on motor operation.
• The engine integrates service and troubleshooting tools.
• The engine integrates a versatile configur
able auxiliary temperature sensor.
• The engine incorporates various safety and loc
kout features, such as maintaining proper fan
speeds if electric heat is called for.
Status Display
The ECM engine 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, please consult Table 33 and Table 34 for the
graphical representation of each alphanumeric character.
Figure 2. ECM engine controller
Figure 3. Status display
Table 33. Screen representation of alphabetical characters
ABCDEFGHI J KLMNOPQRSTUVWXYZ

Table 34. Screen representation of numeric characters
1234567890

UNT-PRC001-EN.book Page 39 Tuesday, May 8, 2012 10:54 AM