ECM Overview and Setup
92
UNT-SVX07E-EN
Adjustments
After connections of power and hookup of customer
installed controls/fan speed switches 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 40. 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
“,” page 148
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
“,” page 148
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.
Refer to
“,” page 148
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.
Refer to
“,” page 148
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. Verify with an appropriate
voltmeter that all capacitors have discharged.
For additional information regarding the safe discharge
of capacitors, see PROD-SVB06A-EN
