Mitsubishi Electric FR-F820-00077 Instruction Manual page 330

(H) Protective function parameter
Fig. 5-53:
NOTES When using terminal 2 for PTC thermistor input (Pr. 561 ≠ "9999"), the terminal 2 will not operate
as an analog frequency command terminal. The PID and dancer control functions assigned to the
terminal 2 will be also disabled. Use Pr. 133 "PID action set point" to set the set point for the PID
function.
To input power to the PTC thermistor power supply, always use the terminal 10. Do not use any
other terminals or an external power supply. Otherwise, the PTC thermistor protection (E.PTC)
does not operate properly.
When E.PTC is activated, the alarm display, "External protection (AU terminal)", may appear on the
parameter unit (FR-PU07), but it is not a fault.
5 - 158
PTC thermistor resistance
The elapsed time count is cleared.
Pr. 561 setting
ALM
Thermistor protection level and detection time
Time
Pr. 1016
E.PTC
Parameters
I003021E