Doosan D20S-7 - Page 152

Operation Section
-149-
List of Detectable Faults
No. Item
Critical Condition
of Fault
Symptoms at Fault
Corrective Action /
Conditions for
Restoration
No. of
Lamp
Flashes
1
Controller
Failure
Voltage supplied to
the controller is 10
Volt or less.
Forward/Reverse
gear shift impossible
Turn key off and
replace the controller.
*Call Doosan A/S
Center to replace the
controller
Remain
always on
2
Controller
Failure
Voltage supplied to
the controller is 30
Volt or above.
Forward/Reverse
gear shift impossible
Remain
always on
3
Controller
Failure
Temperature in the
controller is -40°C
or below.
Forward/Reverse
gear shift impossible
Remain
always on
4
Controller
Failure
Temperature in the
controller is 70°C or
above.
Forward/Reverse
gear shift impossible
Remain
always on
5
Engine RPM
Fault
Engine RPM is 200
or less.
Forward/Reverse
gear shift impossible
Turn key off and
replace the ECT
harness.
*Call Doosan A/S
Center to replace the
controller
1-1-1
6
Forward/Rever
se Lever
Signal Error
Forward/Reverse
signal is active at
the same time
Forward/Reverse
gear shift impossible
Turn key off,
check/replace
For/Rev lever and
harness.
*Call Doosan A/S
Center to replace the
controller
1-6-1
7
Inching Pedal
Sensor Fault
Inching pedal
sensor is higher
than setting value.
Forward/Reverse
gear shift impossible
Turn key off,
check/replace inching
pedal sensor.
*Call Doosan A/S
Center to replace the
controller
1-7-3
8
Inching Pedal
Sensor Fault
Inching pedal
sensor is lower than
setting value.
Forward/Reverse
gear shift impossible
1-7-4
9
T/M Forward
Valve Failure
Port is on but 'High'
status is detected.
Forward/Reverse
gear shift impossible
Turn key off and
replace the ECT
harness and forward
proportional control
valve.
*Call Doosan A/S
Center to replace the
controller
3-1-3
10
T/M Forward
Valve Failure
Port is on but 'Low'
status is detected.
Forward/Reverse
gear shift impossible
3-1-4
11
T/M Forward
Valve Failure
The port is detected
as OFF.
Forward/Reverse
gear shift impossible
3-1-5
12
T/M Reverse
Valve Failure
Port is on but 'High'
status is detected.
Forward/Reverse
gear shift impossible
Turn key off and
replace the ECT
harness and reverse
proportional control
valve.
*Call Doosan A/S
Center to replace the
controller
3-2-3
13
T/M Reverse
Valve Failure
Port is on but 'Low'
status is detected.
Forward/Reverse
gear shift impossible
3-2-4
14
T/M Reverse
Valve Failure
The port is detected
as OFF.
Forward/Reverse
gear shift impossible
3-2-5