Operating Instructions

Descriptions of Parameter Settings
Descriptions of Parameter Settings
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When you set Pr.14-74 or Pr.14-77 to 2 or 4, an ot3/ot4 warning displays and the drive stops running after over-
torque detection. The drive does not run until you manually reset it.
Pr.
Explanation
Settings
Default
14-80
Electronic thermal relay selection
3 (motor 3)
0: Inverter motor (with external forced cooling)
1: Standard motor (motor with the fan on the shaft)
2: Disable
2
14-82
Electronic thermal relay selection
4 (motor 4)
0: Inverter motor (with external forced cooling)
1: Standard motor (motor with the fan on the shaft)
2: Disable
2
● Prevents self-cooled motor from overheating under low speed. Use an electronic thermal relay to limit the
drive’s output power.
● Setting the parameter to 0 is suitable for an inverter motor (motor fan using an independent power supply). For
this kind of motor, there is no significant correlation between cooling capacity and motor speed. Therefore, the
action of electronic thermal relays remains stable in low speed to ensure the load capability of the motor in low
speed.