Mini-Crawler Crane M A E D A Section 5 – TROUBLESHOOTING
1/2019 MC405C-3 5-91
• At the error diagnosis, always verify the indications in the Monitor display in the Receiver and the LCD
screen in the Transmitter. Then find the suitable error display description in the table below so that
the cause is presumed, then, follow the recommended remedy in it.
• First, perform the "Remedy 1" in the table, then continue the "Remedy 2" where the error is not fixed
yet.
• Remedies marked with "*" must inevitably be contacted us or our sales service agency.
• When any other causes are suspected than listed below, contact us or our sales service agency.
Main cause
―――
――
Receiver printed circuit board
(PCB) input voltage dropped.
• Relay PCB defective.
• Power line wire harness
defective between relay PCB
*Maintenance/replace
―――
Communication error
• Relay PCB in the Crane side
defective.
• Wiring failure between the
communication PCB and the
Moment limiter display panel.
• The Moment limiter display
• Power ON again the
Transmitter and
Receiver
• Shut down the
electrical power of the
Crane, then ON
*Maintenance/replace
emergency stop
to release the
*Maintenance/replace
―――
The Transmitter defective
• The Transmitter power is not
ON.
• The Transmitter PCB
defective.
• Wire cut in the Connection
• Power ON again the
Transmitter
*Maintenance/replace
*Maintenance/replace
*Maintenance/replace
• The Receiver PCB defective.
• Wiring problem in the
*Maintenance/replace
The Transmitter defective
• The Transmitter PCB
defective.
• Voltage dropped in the
Transmitter.
• Wirings for Accelerator and
operation levers cut, or fault
• Return the
Accelerator lever and
power ON the
Transmitter, again
*Maintenance/replace
―――
The Transmitter defective
• The Transmitter Accelerator
lever position defective.
• Return the
Accelerator lever and
power ON the
*Maintenance/replace
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