Mini-Crawler Crane M A E D A Section 4 – ELECTRIC MOTOR OPERATION
1/2019 MC405C-3 4-137
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. 4-396
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.
Fig. 4-397
(1) Turn the starter switch key to the "OFF"
position.
The electric motor comes to a stop.
(2) Remove the rear cover (3) as described
in "Removing Rear Cover" on page 5-
19.
(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.
If check finds looseness, torque the
bolts to the specified value to provide
retightening.
Fig. 4-398
(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) After inspecting or cleaning, reattach the
rear cover (3) as described in "Installing
Rear Cover" on page 5-19.
Machine Operation
CAUTION: For more information on individual
crane operations, see the sections from
"TRAVELLING POSITION" on page 4-23 to
"Dos and Don’ts During Crane Operations"
on page 4-60.
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