ECM Overview and Setup
UNT-SVX041D-EN
39
Adjustments
After connections of power and hookup of customer
installed controls/fan speed control and under normal
operative conditions, the only adjustments needed to be
made to the motor control board during commissioning of
the unit are:
•
Adjustment and calibration of the variable speed
inputs (VSP/0–10V) on the system, where applicable.
•
Adjustment, calibration or disabling of the optional
auto-changeover function on CSTI units, where
applicable.
In addition, the CSTI adapter board offers configurability
that can be used in special cases to adjust the following
operation of the unit:
•
Courtesy cooling/main valve logic inversion relays for
use with normally open valves
•
Courtesy heating/auxiliary valve logic inversion relays
for use with normally open valves
•
Changeover function for use with changeover coils (in
conjunction with the motor control board)
The switches are factory-set based on the model number
configuration as ordered; however, the information is
provided below to aid in the understanding of the
operation of the system.
Adjusting Variable Speed Inputs
Table 23. Error codes
Displayed
during
abnormal
operation.
Indicates a locked rotor condition of Motor 1. The motor will be locked out until the
cause has been resolved, and the power cycled; refer to
for
resolution details.
Fan Status function, if being used, will report an inoperative motor. Electric heat and
changeover heat will be shut down.
Indicates a locked rotor condition of Motor 2. The motor will be locked out until the
cause has been resolved, and the power cycled; refer to
for
resolution details.
Motor 1 will continue to operate, but will not be monitored. Fan Status function, if
being used, will report an inoperative motor. Electric heat and changeover heat will be
shut down.
Indicates that Motor 1 has experienced a run-away or over speed condition, and has
been shutdown. The unit will offer limited “limp-in” performance, and Motor 2 will
continue to operate, but will not be monitored. Fan Status function, if being used, will
report an inoperative motor.
to reset, the cause must be resolved and the power to the
unit cycled. Electric heat and changeover heat will be shut down.
Indicates that Motor 2 has experienced a run-away or over speed condition, and has
been shutdown. The unit will offer limited “limp-in” performance, and Motor 1 will
continue to operate, but will not be monitored. Fan Status function, if being used, will
report an inoperative motor.
to reset, the cause must be resolved and the power to the
unit cycled. Electric heat and changeover heat will be shut down.
Indicates the motor is transitioning between speeds, ramping up or down. The
message “RAMP” is briefly displayed, followed by the target speed for “Motor 1” only.
Once the target speed has been reached, the status display will resume operation.
On power on, the version of software is briefly displayed, followed by the results of a
POST (power on self test).
Note:
Fan coil units have only Motor 1 installed.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. For variable frequency drives or
other energy storing components provided by Trane or
others, refer to the appropriate manufacturer’s literature
for allowable waiting periods for discharge of
capacitors. Verify with a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
