PAT DS 150, Service Manual

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Troubleshooting Flow Charts 38
PROBLEM: Interference from crane
electric. Error Code “E93/E94"
intermittent. Frozen console displays.
Interference Problem
START
Refer to Section 8 - Bad Data
Transfer Between Console & Central Unit.
Correct? No Replace or repair part which is defective.
Yes
Check if additional ground link between main
board terminal X1:3 and central unit box mounting bracket is in place.
Correct? No
Install ground line - single cable minimum of AWG14 (2.0mm ) between
terminal X1:3 and central unit box mounting bracket.
Refer to system wiring diagram.
Yes
Ensure that cable shields are connected correctly. Refer to connection and
wiring diagrams, Refer to system wiring diagram.
Correct? No
Make correct shield connection.
Refer to system wiring diagram.
Yes
Find out which component of the crane electric is spiking out (e.g. dump valve, outrigger relay). Install
a diode or resistor across terminals of spiking component. Diode type such as 1N4001 can be used,
END