User Interface - Trane BCHE Installation, Operation And Maintenance Manual

To check status, configuration, or to change settings on the
motor control board with the power on the unit, remove the
two screws at the top of the low voltage access lid and
open. The motor control board will be visible. See the
following figure.
Figure 88. VelociTach motor control board
Table 30. Operational Status Codes
RPM ModeRUNNING/ FAN
STATUS CONTINUOUS LOOP
Displayed when:
1) No error codes are present
2) Motor has completed ramping
(a) Motor 1 is the only motor in fan coil units.

User Interface

The VelociTach motor control board's on-board user
interface is easy to use and supports:
BCX-SVX002A-EN
Indicates the current rpm of Motor 1 in the system. "0" rpm here
mtr1 0000 → 2000
indicate that no fan speed has been requested.
Indicates the current rpm of Motor 2 in the system. "0" rpm here
mtr2
indicate a fan off condition OR a fan "missing"
0000 → 2000
Indicates the status being calculated or Fan Motor 1. If "off," this
indicates that either:
1) No fan speed is being requested or
2) The fan performance is failing to meet the request; refer to
Fst1
Motors," p. 138
yes / no
If "on," this indicates that the fan is performing correctly and will be
used to report fan status correctly, depending on
FPRV
mode.
Indicates the status being calculated or Fan Motor 2. If "off," this
indicates that either:
1) No fan speed is being requested or
2) The fan performance is failing to meet the request; refer to
Motors," p. 138
Fst2
3) If the target speed for Motor 2 is "0,"this is used to indicate a missing
yes / no
motor .
If "on," this indicates that the fan is performing correctly and will be
used to report fan status correctly, depending on
FPRV
mode.
Indicates that the temperature sensing circuit has calculated a logical
EhEn
"on" based on the settings of the following parameters:
Yes / no
Ai2m / ai2b / aipu
ECM Overview and Setup
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:
for additional troubleshooting information.
for additional troubleshooting information.
• Verification/auditing of on-board parameter settings
(read-only)
• Adjustment of the on-board settings (write)
(a) .
"ECM
"ECM
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