Malfunctions during crane operation
14.4 Troubleshooting
Operating manual GMK 6400 3 112 993 en 14 - 17
12.07.2013
Telescoping
mechanism error
messages
If ECOS disables the telescoping mechanism, the following display is shown
in the
Telescoping submenu.
– All the symbols (3) for operation disappear –
the corresponding buttons are disabled.
– The display (1) appears.
– An error code (2) is indicated.
• Always note this error code before contact-
ing Manitowoc Crane Care
.
The display (1) shows the symbol for the cur-
rent status:
s
Telescoping function not
working
Function disabled by ECOS If necessary, acknowledge
error once and briefly turn off
the ignition – if error persists,
notify Manitowoc Crane Care
Fuse RCL F6 blown Replace blown fuse;
à p. 14 - 11
Fuse F3/3 blown Replace blown fuse;
à p. 14 - 9
Telescoping not possible, or
only at low speed
Speed limited Increase limit;
à p. 11 - 107
Telescoping cannot be
switched off
ECOS malfunction Emergency stop switch;
à p. 14 - 1
The main boom can no longer
be telescoped; the telescop-
ing cylinder can no longer be
moved
The hydraulic supply is inter-
rupted
Retract the telescopic section
by means of mechanical
emergency operation;
à p. 14 - 40
No response to control lever
movements
ECOS malfunction concerning
operating elements in the
crane cab
Unrig using hand-held con-
trol;
à p. 14 - 55
Malfunction Cause Solution
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