Thermistor Calibration (C29) - Mitsubishi Electric 800 Series Instruction Manual

6.3.4

Thermistor calibration (C29)

Perform calibration of the inverter and FR-A8AZ (thermistor interface) at installation, before starting the motor.
NOTE
• Calibration must be performed at installation.
 Calibration method
1.
Set the switch for thermistor calibration (SW2) to align with the line to bring the FR-A8AZ to the calibration status.
2.
Read C29 (Pr.925) and set the compensation value.
• Compensation using the operation panel (FR-DU08) Refer to
• Compensation using the LCD operation panel (FR-LU08) Refer to
3.
After the compensation is completed, return the switch for thermistor calibration (SW2) to the original position.
NOTE
• Always return the SW2 to the original position after calibration. If the motor is started in the calibration status, the Motor
overload trip (E.THM) is activated to shut off the inverter output.
SW2
SW2
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SW2
MOTOR THERMISTOR INTERFACE
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