ECM Overview and Setup
36
UNT-SVX041D-EN
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)
The user interface has three input buttons (see the figure
below), from left to right:
•
Menu/Set
•
Decrement
•
Increment
Each button has several different actuation levels
depending on length of press, and what the UI is currently
displaying.
Figure 22.
Operational status codes
RPM Mode
RUNNING/ FAN STATUS
CONTINUOUS LOOP
Displayed when:
1) No error codes are present
2) Motor has completed ramping
Indicates the current rpm of Motor 1 in the system. “0” rpm
here indicate that no fan speed has been requested.
Indicates the current rpm of Motor 2 in the system. “0” rpm
here indicate a fan off condition OR a fan “missing”
condition
(a)
.
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
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
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
for additional troubleshooting
information.
3) If the target speed for Motor 2 is “0,”this is used to
indicate a missing motor
(a).
If “on,” this indicates that the fan is performing correctly and
will be used to report fan status correctly, depending on
mode.
/
Indicates that the temperature sensing circuit has calculated
a logical “on” based on the settings of the following
parameters:
/
/
/
(a) Motor 1 is the only motor in fan coil units.
Figure 23.
User interface input buttons
