Failure Code [Ca227] Sens 2 Supply Volt High Error; Failure Code [Ca234] Eng Overspeed - Komatsu PC200-8M0 Shop Manual

SEN06133-00

Failure code [CA227] Sens 2 Supply Volt High Error

Action
Failure code
level
L03 CA227
q
Detail of failure High voltage appears in sensor power supply 2 circuit.
q
Action of con- Takes boost pressure and boost temperature to be at fixed values and allows engine to run.
q
troller Restricts engine output and allows engine to run.
q
Problem on Engine output lowers.
q
machine Engine starting performance becomes deteriorated.
Related infor-
q
Method of reproducing failure code: Turn starting switch to ON position.
mation
Cause

Failure code [CA234] Eng Overspeed

Action
Failure code
level
– CA234
q
Detail of failure Engine speed exceeds upper limit of speed control.
Action of con-
q
Stops injection until engine speed lowers to normal level.
troller
Problem on
q
Engine speed fluctuates.
machine
q
Engine speed can be checked with monitoring function.
Related infor-
(Code: 01002 Engine speed)
mation
q
Method of reproducing failure code: Start engine and keep it running at high idle.
Cause
1 Use of improper fuel
2 Usage is improper
3 Defective engine controller
44
40-301
Sensor 2 Power Supply Voltage High Error
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Perform troubleshooting for failure code [CA187].
Engine Overspeed
Failure
(Engine controller system)
Procedure, measuring location, criteria and remarks
Fuel used may be improper. Check it.
Method of using machine may be improper, so instruct operator on how to use
machine properly.
If no failure is found by checks on causes 1 and 2, engine controller may be
defective. (Since this is an internal defect, troubleshooting cannot be per-
formed.)
301 Troubleshooting by failure code, Part 1

Failure code [CA227] Sens 2 Supply Volt High Error

PC200, 200LC, 220, 220LC-8M0