Trane TR200 Series Programming Manual page 20

Introduction
Protection Mode
Once a hardware limit on motor current or dc-link voltage is exceeded the drive will enter "Protection mode".
"Protection mode" means a change of the PWM modulation strategy and a low switching frequency to minimize
losses. This continues 10 sec after the last fault and increases the reliability and the robustness of the drive while
re-establishing full control of the motor.
In hoist applications "Protection mode" is not usable because the drive will usually not be able to leave this
mode again and therefore it will extend the time before activating the brake – which is not recommendable.
The "Protection mode" can be disabled by setting par.14-26 Trip Delay at Inverter Fault to zero which means
that the drive will trip immediately if one of the hardware limits is exceeded.
Note
It is recommended to disable protection mode in hoisting applications (par.14-26 Trip Delay at Inverter Fault =
0).
TR200 Programming Guide 19