Toshiba TOSVERT VF-MB1 Instruction Manual page 72

Note 1: If the load applied to the inverter exceeds 150% of its rated load or the operation frequency is less than
0.1Hz, the inverter may trip (  or  to  ) in a shorter time.
Note 2: The inverter is factory-set so that, if the inverter becomes overloaded, it will automatically reduce the
carrier frequency to avoid an overload trip (  or  to  ). A reduction in carrier frequency
causes an increase in noise from the motor, but this does not affect the performance of the inverter.
If you do not want the inverter to reduce the carrier frequency automatically, set the parameter
 =  .
Note 3: Overload detection level is variable by condition of output frequency and carrier frequency.
Note 4: Regarding to characteristic for aul = 2 setting, refer to section 3.5.5).
4) Electronic thermal memory f632
When the power is OFF, it is possible to reset or maintain the overload totaling level.
This parameter's settings are applied both to the motor's electronic thermal memory and the electronic
thermal memory for inverter protection.
[Parameters settings]
Title Function
Electronic thermal memory

 =  is a function for complying with the U.S. NEC standards.
Adjustment range
0: Disabled
1: Enabled
C-21
E6581697
3
Default setting
