BCX-SVX002A-EN
89
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
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:
Table 30. Operational Status Codes
RPM ModeRUNNING/ FAN
STATUS CONTINUOUS LOOP
Displayed when:
1) No error codes are present
2) Motor has completed ramping
mtr1 0000 → 2000
Indicates the current rpm of Motor 1 in the system. "0" rpm here
indicate that no fan speed has been requested.
mtr2
0000 → 2000
Indicates the current rpm of Motor 2 in the system. "0" rpm here
indicate a fan off condition OR a fan "missing"
(a)
.
Fst1
yes / no
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 “ECM
Motors,” p. 138 for additional troubleshooting information.
If "on," this indicates that the fan is performing correctly and will be
used to report fan status correctly, depending on
FPRV
mode.
Fst2
yes / no
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 “ECM
Motors,” p. 138 for additional troubleshooting information.
3) If the target speed for Motor 2 is "0,"this is used to indicate a missing
motor .
If "on," this indicates that the fan is performing correctly and will be
used to report fan status correctly, depending on
FPRV
mode.
EhEn
Yes / no
Indicates that the temperature sensing circuit has calculated a logical
"on" based on the settings of the following parameters:
Ai2m / ai2b / aipu
(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:
• Verification/auditing of on-board parameter settings
(read-only)
• Adjustment of the on-board settings (write)
ECM Overview and Setup
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