Failure Code [Dv00Ky] Alarm Buzzer: Hot Short - Komatsu WA250-6 Shop Manual

SEN03846-00

Failure code [DV00KY] Alarm buzzer: Hot short

Action code Failure code
E01 DV00KY
Contents of
• The alarm buzzer output circuit is shorted with the power source.
trouble
Action of • Stops alarm buzzer output.
machine monitor
• Even if cause of failure disappears, system does not reset itself until starting switch is turned OFF.
• Alarm buzzer does not sound.
• Backup alarm/lamp may not operate.
Problem that
appears on • ECSS may not operate.
machine
• If trouble occurs while backup alarm/lamp is in operation, backup alarm/lamp output is turned OFF.
• If trouble occurs while ECSS is in operation, ECSS output is turned OFF.
• The output state (ON/OFF) to the alarm buzzer can be checked with the monitoring function.
(Monitoring code: MONITOR PANEL – 40925 – D-OUT-0)
• Output state (ON/OFF) to backup alarm/lamp relay can be checked with monitoring function.
Related
(Code: MONITOR PANEL – 40952 – D-OUT-2)
information
• Output state (ON/OFF) to ECSS relay can be checked with monitoring function.
(Code: MONITOR PANEL – 40952 – D-OUT-3)
• Method of reproducing failure code: Turn the starting switch ON.
Hot short in wiring harness
1
(Contact with 24V circuit)
Possible causes
and standard
value in normal
Defective alarm buzzer
2
state
(Internal short circuit)
3 Defective machine monitor
28
40-360
Alarm buzzer: Hot short
Trouble
(Machine monitor system)
Causes
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harness between L24 (female) (14) –
L46 (female) (2) and chassis ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
• Remove the buzzer, then connect +24 V to L46 (male) (1) and
GND to L46 (male) (2).
Alarm buzzer sounds
Alarm buzzer does not sound
• When above 1 and 2 are normal, failure on the machine monitor
can be suspected. (Since trouble is in system, troubleshooting
cannot be carried out.)
360 Troubleshooting by failure code (Display of code), Part 6
Failure code [DV00KY] Alarm buzzer: Hot short
Standard value in normal state/Remarks on troubleshooting
Voltage Max. 1 V
Alarm buzzer is
normal
Defective alarm
buzzer
WA250, 250PZ-6