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FOREWORD
13. Handling controller
A. The controller contains a microcomputer and electronic control
circuits. These control all of the electronic circuits on the
machine, so be extremely careful when handling the controller.
B. Do not place objects on top of the controller.
C. Cover the control connectors with tape or a vinyl bag. Never
touch the connector contacts with your hand.
D. During rainy weather, do not leave the controller in a place
where it is exposed to rain.
E. Do not place the controller on oil, water, or soil, or in any hot
place, even for a short time. (Place it on a suitable dry stand.)
F.
Precautions when performing arc welding.
•
When performing arc welding on the body, disconnect all
wiring harness connectors connected to the controller. Fit
an arc welding ground close to the welding point.
14. Points to remember when troubleshooting electric circuits.
A. Always turn the power OFF before disconnecting or
connecting connectors.
B. Before performing troubleshooting, check that all the related
connectors are properly inserted.
•
Disconnect and connect the related connectors several
times to check.
C. Always connect any disconnected connectors before going on
to the next step.
•
If the power is turned ON with the connectors still
disconnected, unnecessary abnormality displays will be
generated.
D. When performing troubleshooting of circuits (measuring the voltage, resistance, continuity, or current), move the
related wiring and connectors several times and check that there is no change in the reading of the tester.
•
If there is any change, there is probably a defective contact in that circuit.
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HANDLING ELECTRIC EQUIPMENT AND HYDRAULIC COMPONENTS
PC390LL-10
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