RUN XT: Service & Maintenance Manual - rev. 2.0
Page 3.5
CN1 on the inverter interface board). The signal input to the inverter increases with increasing
speed.
The relationship between the speed reference and the inverter frequency is determined by the
programming of the inverter.
• Alarm signal
This is the signal generated by the inverter if a problem is detected in the motor drive, or if the
motor thermal cutouts open. It enters the inverter interface board (pins 3-4 of connector CN1)
and its value is 0 Vdc under normal conditions, 10 Vdc under alarm conditions.
The signal is then sent to the inverter interface board (pins 9-3 of connector CN2) to the CPU
board (pins 8-3 of connector CN1) and is 5 Vdc under normal conditions, 0 Vdc under alarm
conditions. When this alarm signal switches to 0 Vdc, the CPU disables the Start signal, resets
the PWM signal and shows the E3 or E4 error message on the display.
To Next Page
Loading...
