Adjustments; Adjusting Variable Speed Inputs - Trane BCHE Installation, Operation And Maintenance Manual

ECM Overview and Setup
Table 32. Error codes
m m t t r r 1 1
LOCK
mtr2
LOCK
mtr1
Displayed
Ospd
during
abnormal
operation.
mtr2
Ospd
Ramp
0000 → 2000
2000 → 0000
v123
Note: Fan coil units have only Motor 1 installed.

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.
92
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
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
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 "ECM Motors," p. 138 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 "ECM Motors," p. 138 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).
"ECM Motors," p. 138 for resolution details.
"ECM Motors," p. 138 for resolution details.

Adjusting Variable Speed Inputs

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.
BCX-SVX002A-EN