Fault Phenomenon: Manitex truck crane using the wireless remote control, the display shows “No Signal,” wired operation is normal.

Troubleshooting Process:
– Checked remote control battery: sufficient power.
– Checked receiving antenna: antenna cable broken.
– Checked frequency matching: strong electromagnetic interference on site.
– Replaced antenna cable and switched to backup frequency.

Root Cause: The receiving antenna cable was broken and external electromagnetic interference was present.

Required Parts: Antenna cable assembly.