Failure Code [Dv20Kb] Travel Alarm Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06136-00

Failure code [DV20KB] Travel Alarm Short Circuit

Action
Failure code
level
L01 DV20KB
q
Detail of failure Abnormal current flows when pump controller drives travel alarm circuit.
q
Stops driving travel alarm circuit.
Action of con-
q
Even if cause of failure disappears, machine does not become normal until starting switch is set to
troller
OFF position.
Problem on
q
Travel alarm does not sound.
machine
q
Operation (ON or OFF) of travel alarm can be checked with monitoring function.
Related infor- (Code: 03701 Controller output 2)
q
mation As T-adapter for pump controller connector is "socket-type box", operating voltage cannot be mea-
sured at pump controller connector.
Cause
Defective travel alarm
1
(internal defect)
Ground fault in wiring harness
2
(contact with ground circuit)
3 Defective pump controller
34
40-304
Travel Alarm Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector M14, and connect T-adapters to female side.
3. Turn starting switch to ON position.
4. Operate travel lever to perform troubleshooting.
Between M14 (female) (1)
and (2)
a If the above voltage is normal but travel alarm does not sound, travel alarm
is defective.
1. Turn starting switch to OFF position.
2. Disconnect connectors C02 and M14, and connect T-adapters to either
female side.
Between C02 (female) (107) and ground, or
between M14 (female) (1) and ground
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector M14.
3. Turn starting switch to ON position.
4. Operate travel lever to perform troubleshooting.
Between M14 (1) and (2)
304 Troubleshooting by failure code, Part 4
Failure code [DV20KB] Travel Alarm Short Circuit
Travel lever:
Voltage
NEUTRAL
Travel lever:
Voltage
Operated
Resistance
Travel lever:
Voltage
NEUTRAL
Travel lever:
Voltage
Operated
PC200, 200LC, 220, 220LC-8M0
Max. 1 V
20 to 30 V
Min. 1 Mz
Max. 1 V
20 to 30 V