
13
Fig 6
System Alarm Codes
Alarm Code 4 or 5 ( Length Sensor)
This code is caused by the output voltage of the length sensor is lower (code 4 ) than the
minimum, higher (code 5 ) than the maximum voltage or higher than the actual value.
Actions to take; Level the machine,
Fully retract the boom and lower the angle to zero
degrees.
Length indication is in percentage of length 0-100%
1.
Check the cable is spooling properly on the drum. If cable is built up on one side of
drum correct it and adjust the roller guide on the cable reel to correct.
2.
Remove the cover of the cable reel using a m3 allen wrench and check the +12.00vdc
(Typically the voltage is about 11.94vdc) supply voltage (Brown wire) and the ground
wire (white wire). See Fig 5. If the voltage is ok continue to step 2, if not check the
wiring from the cable reel to the display for damage.
3.
Check the output of the length sensor. The output of the length sensor when the boom
is fully retracted should be approximately .250vdc.( wire), (tolerance .246 to .254vdc is
OK). If it is higher or lower check the wiring first for damage. If the wiring is ok, press
down on the length pot swing arm(Fig 6) and adjust the gear until the display indicates
what the minimum boom length for that model of machine. Check the voltage and
record this for later use.
4.
If adjusting the length gear assembly and the length does not change on the display,
remove the output wire and check if the voltage changes, if not change the length pot
and adjust the length.
5.
If still incorrect call service to set length sensor in display
Fig 5
3B6
Troubleshooting Manual