Trane HUV Installation, Operation And Maintenance Manual page 52

ECM Overview and Setup
Error Codes
Displayed during
abnormal operation.
52

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

refer to
Motor 2 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 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

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
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
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).
"Troubleshooting (ECM), " p. 103
"Troubleshooting (ECM), " p. 103
"Troubleshooting (ECM), " p.
"Troubleshooting (ECM), " p.
for resolution details.
for resolution details.
103: to reset, the cause must be
103: to reset, the cause must be
UV-SVN02C-EN