Maeda MC305C-3 - Page 290

Section 5 – TROUBLESHOOTING Mini-Crawler Crane M A E D A
5-86 3/2019 MC305C-3
Error display
Main cause
Remedy
Transmitter
Receiver
Transmitter
Receiver
The Transmitter, internal devices
defective.
• Operation levers were not in the
neutral position, when power was
turned ON.
• Return operation
levers and push the
Reset button.
*Maintenance/replace
―――
―――
The Transmitter, internal Devices
defective.
• Data error in the memory.
• Power on the
Transmitter, again.
*Maintenance/replace
―――
Breaking of wire for telescopic
control
*Maintenance/replace
―――
Breaking of wire for hoisting control
*Maintenance/replace
―――
Breaking of wire for derricking
control
*Maintenance/replace
―――
Breaking of wire for slewing control
*Maintenance/replace
―――
Breaking of wire for accelerator
*Maintenance/replace
―――
Valve neutral error
*Maintenance/replace
The Crane operates perfectly
under the manual mode but
some functions are not
available in the remote control
mode.
• The Receiver PCB defective.
• Wiring failure between the
Receiver PCB and the control
valve solenoids.
• Electromagnetic proportional
control reducing valve error.
* Maintenance /
replace
* Maintenance /
replace
* Maintenance /
replace