T
roubleshooting
Maintenance Manual for Crawler Crane
No. Troubles Causes Solutions
8
The switch on control
panel is not in
1. The circuit is out of order. 1. Check and repair the circuit.
2. The switch is damaged. 2. Change the switch.
9
The control lever is not
in functional work.
1. The circuit is out of order. 1. Check and repair the circuit.
2. The control lever is
damaged.
2. Change the control lever.
10
The foot-operated horn
switch can not work.
1. The circuit is out of order.
1. Check and repair the circuit.
2. The switch is damaged. 2. Change the switch.
11
The LCD screen of
parameter monitor
fails.
1. The circuit is out of order. 1. Check and repair the circuit.
2. The screen is damaged.
(The screen is black, blurred or
the key on the screen is
2. Change the screen.
3. The communication to PLC
fails. (The data shown is
3. Check and repair the circuit
or consult the after-sale service
man of crane manufacturer.
5.4.2 Troubleshooting of slewing table electrics
Table 5-5 Troubleshooting of slewing table electrics
No. Troubles Causes Solutions
1
The battery master
The battery master switch is
Change the battery master
2
The pressure sensor
fails (no pressure is
shown on the screen of
the cab).
1. The circuit is out of order. 1. Check and repair the circuit.
2. The pressure sensor is
damaged.
2. Change the pressure
sensor.
3
The inclination sensor
fails (no inclination is
shown on the screen of
1. The circuit is out of order. 1. Check and repair the circuit.
2. The inclination sensor is
damaged.
2. Change the inclination
sensor.
4
The traveling alarm
does not sound the
alarm.
1. The circuit is out of order. 1. Check and repair the circuit.
2. The traveling alarm is
2. Change the traveling alarm.
3. The controller can not output
the signal.
3. Consult the after-sale
service man of crane
5-12
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