Doosan AD158TI, Operation & Maintenance Manual

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Troubleshooting
1. When the system does not work
When the engine actuator does not work, you can deduce the fault by performing the following four-step
voltage test.
Be sure to check the polarity when performing measurements.
Step Terminal Specifications Possible cause
1 F (+) & E (-)
Battery supply voltage
(12 or 24V DC)
1. DC battery power not connected, check for dam-
aged fuse
2. Low battery voltage.
3. Faulty wiring connection.
2 C & D
1.0V AC
(when starting the
engine)
1. Large gap between magnetic pick-up sensor and
ring gear (Check gap)
2. Faulty wiring in magnetic pick-up sensor
(Check whether the resistance between terminals C
and D is 30 ~ 1,200)
3. Fault in magnetic pick-up sensor
3 P (+) & G (-)
10V DC
(Internal supply voltage)
1. Short circuit in terminal P (causes fault in controller)
2. Fault in magnetic pick-up sensor
4 F (+) & A (-)
1.0 ~ 2.0V DC
(when starting the
engine)
1. Low setting value for controller speed adjustment.
2. Open or short circuit in actuator wiring.
3. Fault in controller
4. Fault in actuator