起
重
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说
明
Tr
ou
bleshooting
Maintenance Manual for Crawler Crane
5.4 Troubleshooting of electrical system
5.4.1 Troubleshooting of cab electrics
Table 5-4 Troubleshooting of cab electrics
No. Troubles Causes Solutions
1
The wiper does not
work.
1. The wiper switch is
1. Change the wiper switch.
2. The wiper motor fails. 2. Check and repair the wiper
motor. Or change it if
3. The drive device of wiper
3. Check and repair the drive
2 The fan does not work.
1. The fan motor fails. 1. Check and repair the fan
motor. Or change it if
2. The circuit is out of order. 2. Check and repair the circuit.
3
The cigarette lighter
does not work.
1. The safety fuse is broken. 1. Change the fuse.
2. The resistance wire blows
2. Change the wire.
3. The circuit connection is
3. Check and repair the circuit.
4. Poor contact of switch. 4. Check or change the switch.
4
The radio does not
work.
1. The circuit is out of order. 1. Check and repair the circuit.
2. The radio is damaged. 2. Change the radio.
5
The interior light of cab
fails.
1. The circuit is out of order.
1. Check and repair the circuit.
2. The interior light is
2. Change the interior light.
6
Nothing is shown in the
LCD screen of monitor.
1. The circuit is out of order. 1. Check and repair the circuit.
2. The relevant video camera
2. Change the relevant video
3. The LCD screen is
3. Change the LCD screen.
7
The rocker switch is
not in functional work.
1. The circuit is out of order.
1. Check and repair the circuit.
2. The rocker switch is
damaged.
2. Change the rocker switch.
5-11