Manitowoc GROVE GMK4090 User Manual

Malfunctions during crane operation
14.4 Troubleshooting
Operating manual 3 302 736 en 14 - 17
GMK4090
xx.xx.xxxx
14.4.6 Malfunctions in the telescoping mechanism
Malfunction Cause Solution
Telescoping mechanism
not working or
malfunctioning
Telescoping mechanism off,
lamp in button lights up dimly
Switch on the telescoping
mechanism;
à p. 11 - 88
Dead man's switch system
not actuated
Press dead man's switch
Emergency stop switch on
à Emergency stop switch,
resetting
, p. 4 - 20
Control unit fuse blown Replace the blown fuse;
à p. 14 - 72
Control unit faulty, error mes-
sage is displayed
Acknowledge error mes-
sage once;
à p. 14 - 7 – if
error persists, notify
Manitowoc Crane Care
Extending function not
working
Control unit fuse blown Replace the blown fuse;
à p. 14 - 72
RCL shutdown, lamp lights up Leave the shutdown
range;
à p. 11 - 56
Lifting limit switch
approached, lamp lights up
Leave the shutdown
range, retract boom
Retracting function not
working
Insufficient lubrication Lubricate main boom;
à Maintenance manual
Main boom is not steep
enough
Leave the shutdown
range and raise the boom
Telescoping function not
working
Function disabled by CCS,
error message is displayed
Acknowledge error mes-
sage once;
à p. 14 - 7 – if
error persists, notify
Manitowoc Crane Care
Control unit fuse blown Replace the blown fuse;
à p. 14 - 72
Telescoping not possible
or only possible at very
low speed
Speed limited Increase limit;
à p. 11 - 123
Telescoping cannot be
switched off
Malfunction in crane control Emergency stop switch;
à p. 10 - 12
s

Manitowoc GROVE GMK4090 Specifications

General

Brand	Manitowoc
Model	GROVE GMK4090
Category	Construction Equipment
Language	English