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bobby91Jul 25, 2025
What to do if the line switch (KM1) is open on Manitou Boom Lifts?
- JJasmine PenaJul 25, 2025
If the line switch (KM1) is open and the variable speed controller measures a voltage on terminal “A” 3 volts less than the battery’s rated voltage, examine the mechanical condition of the switch, the coil of the switch, and the control of the switch coil. Also, check the power and auxiliary fuses, and the wiring of the motors. Verify output B8 of the variable speed controller logic module, ensuring the signal is negative; if not, the line switch driver is out of service, and the variable speed controller should be changed.
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