M A E D A Mini-Crawler Crane Section 4 – ELECTRIC MOTOR OPERATION
3/2019 MC305C-3 4-125
4. Conduct 5-minute warm-up after the electric
motor is started.
NOTICE: This machine is structured to switch to
the energy-saving mode if no lever operation is
attempted within 5 minutes after the electric
motor is started.
Once the energy-saving mode has been entered,
the electric motor undergoes an extreme
reduction in rotational speed.
Operate any lever for recovery from the
energy-saving mode.
The electric motor comes to a stop if no lever
operation is attempted within further 30 minutes
after being started.
Turn the starter switch to the "START" position
again for recovery.
5. Visually check through the access
protective cover of the Inverter unit that the
trouble lamp remains OFF.
Fig. 4-368
CAUTION: An error occurs in the Inverter
unit, which causes the trouble lamp to come
ON in red.
Contact us or our sales service agency.
6. Use the following procedure for checking
the power unit if an abnormal noise, odour,
or vibration is present in and around the
power unit.
(1) Turn the starter switch to the "OFF"
position.
The electric motor comes to a stop.
(2) See "Removing Rear Cover" on page
5-19 and remove the rear cover.
(3) Check the mounting bolts securing the
electric motor (5) and hydraulic pump
(6) for looseness and falling off, and
check the coupling (7) for looseness.
Fig. 4-369
(4) Keep the periphery of the power unit
free of dead leaves, paper waste, and
dust.
Eliminate dead leaves, paper waste,
and dust if heaped or adhered.
(5) See "Installing Rear Cover" on page
5-19 and install the rear cover.
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