Maeda MC285CB-3 - Electric Motor

Section 5 – TROUBLESHOOTING Mini-Crawler Crane M A E D A
5-60 9/2020 MC285CB-3
Electric Motor
Problem Major Cause(s) Actions
Motor does not start with the starter
switch turned on, even when control
levers are operated.
Insufficient battery capacity Charge battery.
Defective wiring * Inspect, repair, or replace.
Operation detection limit
switches incorrectly
adjusted or defective
* Inspect, repair, or replace.
Motor stops during use.
Overheating
Reduce the hydraulic oil
temperature, motor temperature,
and motor controller temperature.
Electric motor defect * Inspect, repair, or replace.
Operation detection limit
switches incorrectly
adjusted or defective
* Inspect, repair, or replace.
Insufficient battery capacity Charge battery.
Motor output is low or gradually
decreases.
Motor emits abnormal sound or vibration
while in operation.
Insufficient battery capacity Charge battery.
Controller error * Inspect, repair, or replace.
Motor overheats while in operation.
Motor output is low or gradually
decreases.
Motor or pump retaining
bolts loose
* Inspect and replace.
Motor or pump defect * Inspect and replace.
Motor emits abnormal sound or vibration
while in operation.
High working load
Reduce working load.
Increase interval between tasks.
Working at high elevation
Move to lower elevation.
High ambient temperature
Take measures to protect against
high temperatures.
Warming up is turned on. Turn off warming up.
Defective cooling fan * Inspect and replace.